STL - YUL

Find cheap flights from St. Louis to Montreal

Search hundreds of travel sites at once for deals on flights to Montreal

STL — YUL
6 Dec — 13 Dec1
Return
1 adult
Economy
0 bags
From?
To?
Tue 6/12
Tue 13/12

Let KAYAK do the searching

Save 23% or more

Search hundreds of travel sites at once for deals on flights to Montreal

We’re completely free to use – no hidden charges or fees.

Filter by cabin class, free Wi-Fi and more

Good to know

Low season

January

High season

November

Cheapest flight

C$ 628

Average price round-trip

C$ 715
Best time to beat the crowds (63% less expensive on average)
Most popular time to fly (23% more expensive on average)
Flight from Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl
(avg. price over the last 2 weeks)

When to book flights from St. Louis to Pierre Elliott Trudeau Intl

Estimated round-trip price
Average price per month
Flight prices as travel date approaches

Top tips for finding a cheap flight out of St. Louis

  • High season is considered to be October, November and December. The cheapest month to fly is January.
  • Morning departure is around 28% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for booking St. Louis to Montreal flights

Top 4 airlines serving Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl

Scores according to KAYAK customer reviews
7.9
DeltaOverall score based on 31860 reviews
8.1Boarding
7.8Comfort
8.5Crew
7.8Entertainment
7.5Food
Airline reviews

In Salt Lake City the directions from the gate to the outside bus area to take passengers to the outside gate was unclear. There was no one in view from the entry of the ramp to the end of it. I tripped over the metal bumper and fell on my knees, causing cuts and bruises. Although my luggage falling made a loud noise, there was no response from anyone. I had placed a request for a wheelchair beforehand, also with no response from Delta.

Read more about Delta

In Salt Lake City the directions from the gate to the outside bus area to take passengers to the outside gate was unclear. There was no one in view from the entry of the ramp to the end of it. I tripped over the metal bumper and fell on my knees, causing cuts and bruises. Although my luggage falling made a loud noise, there was no response from anyone. I had placed a request for a wheelchair beforehand, also with no response from Delta.

Pros: "the crew took very good care of us"
Pros: "The crew was nice."
Cons: "N/A"
Pros: "The crew was nice"
Pros: "Nothing, the flight was canceled without a refund. I highly recommend canceling all business with kiwi in the future."
Cons: "My flight could have occurred or I could have been refunded."
Pros: "Being on time with everything."
Cons: "Nothing"
Pros: "quick easy flight"
Cons: "sockets to charge electronics"
Cons: "Really felt happy on time touch down nice journey with delta"
Pros: "Friendly crew"
Cons: "being on time"
Pros: "we could not get a seat until we arrived at the airport."
Pros: "This is a delayed flight after having my flight to the previous night delayed to the extent that I could not take it and make my connecting flight out of Minneapolis."
Cons: "This is a delayed flight after having my flight to the previous night delayed to the extent that I could not take it and make my connecting flight out of Minneapolis."
Pros: "N/A"
Cons: "N/A"
Cons: "Food. Phone charging at seat, entertainment screen."
Pros: "The crew was amazing! The seat was comfortable."
Cons: "Used the self check in kiosk to begin! That was awesome! But after that I still had to stand in line to check in my bags. That part of the process took a bit longer than expected."
Pros: "Nothing special"
Cons: "That was the most uncomfortable and cramped seat I had ever had on a plane flight. Even sitting on the pillow did not help."
Cons: "Slow WiFi"
Pros: "I like that I arrived at my destination safely."
Cons: "My allergies were bothering me due to the airlines allowing animals to travel as passengers, in this case a rabbit. I am very allergic to animals. My breathing was compromised."
Pros: "This had one of the best attendants I have encountered. She was extra friendly and made us feel good."
Cons: "The flight was 2 hours delayed.. this cause a lot of inconvienece.."
Pros: "Everything was on time and efficient. I also liked that the captain came on and updated us on arrival, turbulence, weather, etc."
Cons: "Flight was delayed out of St. Louis causing several of us to miss our connecting flight from Salt Lake City to Portland. Delta was of very little help in assisting us in making a connecting flight. They could have at least helped with travel arrangements and provided us with a little food, a pillow and a blanket as we waited in their terminal for the next flight on their airline which was a several hour wait. I understand these things happen but the passengers didn't cause the problem and Delta needs to take care of people better if they expect to earn repeat business."
Pros: "On time"
Pros: "The flight was fine"
Cons: "Delta does not transfer your luggage in Canada even if they say they do. It will not make it to your final destination"
Cons: "Ac not working at last 30 minutes of flight."
Cons: "The flight attendants weee rude, and no bar service"
Pros: "Nothing"
Cons: "We lost our whole vacation and had to pay for the plans fare twice because My last name was spelled wrong on our tickets and we were unable to use them because my passport didn’t match the name on the ticket. We had to rebook everything pay almost twice as much for the plane fare, our Lodi g cost more and our trip was delayed for two weeks. Vyama is blaming us for spelling our name wrong and claimes that it’s our fault this happened because everything is automated. There saying they don’t touch anything that we enter into the booking but somehow everything they claim we entered is now in all capital letters and the space between our first name and middle name is now gone and all run together. The coustomer service number gets you to someone in India. I have tried to get this addressed four times now at first they tried to place the responsibility on the airlines now us and they have hung up on me twice. Kayak has been worthless, they also just pass the responsibility on to someone else. We will never use them again ant I intend to make sure that this mess is put out in social media to hopefully keep others from having their travel plans ruined by their flawed system."
Cons: "They changed my flight to a different one departing 2 hours earlier and did not notify me! The original flight was still available & they would not let me take it despite my reservation paper work. CRAZY! I have a two hour drive to the airport this gave me the option to leave home at 2:30am or go the night before and pay for a hotel. Flight was managed by DELTA who also did not care! All involved blamed each other. Beware"
Pros: "After flight was cancelled, rebooking was easy and quick on the app."
Cons: "Flight was cancelled. flight attendants were grumpy. One of the tightest seats I've flown in economy. No room in overheads so I had to stuff my winter coat between my legs with my backpack under the seat in front of me. Was basically wedged into the seat with my stuff."
Pros: "it was easy to navigate ."
Cons: "The flight left three hours late while the crew was waiting for an oxygen tank to arrive. We were boarded onto the plane after it was nearly an hour and a half late, then waited in out cramped seats for another hour and a half as we continued to wait for the same piece of equipment. At one point a Delta employee announced over the plane's PA system that we'd be getting vouchers to compensate us for this absurd delay, but there was no explanation of how to claim those vouchers."
Pros: "In flight movies"
Cons: "The flight was 3 hours late taking off which made us miss our connection to chicago so we are stuck in Atlanta tonight with unplanned expenses we were not planning on!"
Cons: "I was seated in first class, and due to some catering mix-up, no meal was served. I was given a banana and crackers which was very disappointing since I hadn't eaten in 8 hours and was starving. No on board entertainment whatsoever."
Cons: "Very uncomfortable seats Oddly shaped overhead bins, unable to put standard sized bags overhead, meanwhile they fit in planes of other major airline companies such as American Airlines. No food options, only sweet biscuit which contains soy and milk."
Cons: "The flight was delay for 3 hours and they only give us chips and water. They didn't explain well what was the problem. The plane was dirty inside and the seats werent comfortable at all, the plane was making weird noises. There is no window in the 11A Window Seat. Really really bad service at all."
Pros: "Plane was clean, attendants were friendly, and food was fine."
Cons: "I had a flight from Detroit to Montreal. Tried to check in and DTW was not a choice on the westjet website and so I physically could not check in. I realized the flight was technically operated not by WestJet, but Gojet. Went to Gojet's website and was told that Delta took care of all of their ticketing and such. Went to Delta's website, entered my ticket number and card number but I was not in the system as I was given all WestJet info (not Delta's). Luckily the baggage check in people figured it all out."
Cons: "My flight got to New York so late!!!! I missed my international flight."
Pros: "Nothing"
Cons: "I could not check in on the kiosk and I had to go to two agents before they could find my reservation. The lines were extremely long and the customer service was poor."
Cons: "Not great communication from gate or staff on board. Failed to provide adequate water. No ice on super warm flight. Just bad experience overall."
Pros: "Spacious, clean, great host and hostesses. The flight arrived at our destination 30 minutes early."
Cons: "Nothing."
Pros: "Newer plane! Comfortable"
Cons: "Nothing just great"
Cons: "Almost everything"
Cons: "Not enough water on the flight and we landed in a parking lot and shuttled back to the airport."
Pros: "Friendly service. On-time."
Cons: "No tv's in airplane."
Cons: "turbulance"
Pros: "I was cleared for standby! Flight attendant at the stl gate is always friendly and willing to help! I love her!"
Cons: "I waited almost 6 hours on the phone the night before the flight to get on standby! Almost didn't get the flight! Was charged $50 only to not get on my next flight because it was over booked! Flight attendant was very rude!"
Pros: "Flight was short."
Cons: "Travel to Canada from the US is generally an unpleasant experience, probably because there are not many travelers. Not many connecting flights and long layovers. Plane is small, no exntertainment, no food, few beverage options."
Pros: "I liked that I was able to get able to get an earlier flight!"
Cons: "I don't like that I had to pay $50 extra dollars for standby on both legs of my flight! I am a very loyal delta customer and these past times flying I feel like my favorite airline is turning into the bad airlines delay everytime, problems with the plane fare prices too high! I'm starting to think about taking my business elsewhere!"
Pros: "10 minutes early departure"
Cons: "There isn't enough seats in the gate area and sitting on the runway for 10 extra minutes we could have been early"
Pros: "It was great and very roomy I felt like a movie STAR!!!"
Cons: "N.A"

So many stories of flights going wrong, and our travel was outstanding.

Leg room was really good.

The staff was very friendly, they were enforcing good safety practices. It's pretty good value for the money, too.

Plane smelled a little funny. Flight was 30 minutes shorter than expected, but gate was occupied when we arrived. Staff was great.

Cons: "Terrible logistics. Stuck on tarmac because they couldn’t clear the previous plane out of the gate. Fellow passengers missed their connecting flights."
Cons: "Same old tiny uncomfortable commuter jet."
Cons: "First time we have flown First Class on American Airlines and service was outstanding and perfect! Thank you for an amazing experience!!"
Cons: "We stay stuck in PVR"
Pros: "Nothing"
Cons: "Handicap issues. We were exiting on the tarmac in Charlotte- all crew left us on the plane waiting for assistance to get off. Finally when someone showed they would not come up the ramo to get my Mom. I backed her down myself while 5 bewildered airport workers looked confused."
Cons: "2 hour delays on both flights of a round trip"
Cons: "4 hour plane availability delay - of course planned on weather but not planning"
Cons: "you didn't respond and we were unable to take the flight."
Pros: "You got us there safely."
Cons: "Not sure who is at fault for running out of de-ice solution, but keeping us sitting on the tarmac without air ventilation for almost 3 hours... with only an apology and a last minute glass of water? that was terrible customer service."
Pros: "Flight left St. Louis on time,"
Cons: "My connecting flight was cancelled while I was in the air. Customer service was SWAMPED with cancellations with only a handful of staff to help. My plane was a mechanical cancellation so I received a food and hotel voucher. Trying to get another flight from LaGuardia to YYZ was horrible."
Cons: "i wasnt able to select a seat when I checked in. they couldn't give me a better seat before bording and the fact that Im the one approaching then to have a seat selection, no one called my name."
Pros: "Flight did not take place because of cancelled return flight. the whole itinerary was cancelled."
Cons: "because of cancelled flight I had to schedule a new itinerary directly through American Airlines. The cost increased from $947.50 to $1,873 plus airport parking for 17 days."
Pros: "On time. Friendly and attentive staff."
Pros: "They got me there on time"
Cons: "Long delay getting off STL-CLT. Made it to gate for CLT-ROC. Then, crew delay. The usual crammed interior, cheap snacks, feeling about like a public bus"
Pros: "I fflew Delta last Nov. Had meals movies dinner inks etc. American I am serv d beverages no meals and no movies. Getting ridiculous"
Pros: "Great seats in first class"
Cons: "N/a"
Pros: "Room between rows Entertainment from St Louis to Phoenix"
Cons: "Flight was cancelled with no compensation"
Pros: "We got to our destination safely, and American provided us with extra legroom seats."
Cons: "Service was curt and there was only phone-based entertainment."
Pros: "Fast"
Pros: "Smooth boarding. On time flight"
Cons: "No gluten free snacks:("
Pros: "Everything went smoothly."
Pros: "The flight was what one would expect from a domestic airline. They did provide free movies/tv which was nice. It was one time to leave and on time to arrive."
Pros: "We got upgraded...Happy New Year to us!!! Service was excellent...landing was one of the smoothest we have ever had! Nice quiet flight with not too many people on board! I will use American Airlines again!"
Cons: "Me 6’ 200 lb sitting in middle seat next to somebody that needed 2 seats for self (pls understand I’m not unsensetive nor prejudice just stating a fact). I requested to sit in last row (of both sides of plane that were empty but attendant said sears reserved for attendants - 2)."
Pros: "Quick boarding, on time departure and early arrival. No waiting for a gate at LGA upon arrival - excellent."
Pros: "To be fair. The flight is only 50 minutes. By th time you get a drink it's time to land. It is completely unfair to the staff to have to do that. A flight like that. Have a box with a snack and some coolers that have 5 different beverages. I wouldn't even sell booze. I person can hold out for a flight that shot to get one on the connection or in the terminal."
Cons: "It's always a cramped flight. Nothing to be done except use a bigger, more spacious plane. The good thing is it's the fastest way to get to Chicago from where I lived it would take 6hrs by car."
Pros: "Spacious seats"
Pros: "Everything was on time!"
Cons: "The video monitor for my seat was broken. So, low entertainment score."
Pros: "everything was on tyime"
Pros: "On time take off"
Cons: "Delayed a total of four hous!"
Cons: "good"
Pros: "Flight was on time, staff was friendly and boarding was organized."
Cons: "I'm a small person (5'-2", 105lbs) and I didn't have room to breathe in that tiny little seat."
Pros: "Smooth - trouble free - calm process"
Pros: "On time arrival"
Cons: "Everything else"
Cons: "Everything was great."
Pros: "The flight attendants were great and very friendly!"
Cons: "The wifi wasn't very good so I couldn't access the in flight entertainment I also had my own snacks so I didn't buy any food"
Cons: "Got to charlotte with 80 minutes to connect. Sat on the tarmac for 60 waiting for a gate. Missed connection by <5 minutes. Thanks, AA!"
Pros: "Non stop"
Cons: "Airline"
Cons: "No food or beverages for me. I slept comfortably on my flight"
Pros: "Plenty of leg room no entertainment so I dozed."
Cons: "People stuffing oversized bags in overhead."
Pros: "The movies"
Cons: "No Food"
Pros: "Frankly there isn't much to say here. After 7 flights in 2 weeks there was only 1 flight with great staff that actually cared about the customers and looked like they enjoyed their job. The rest treated guests with indifference at best."
Cons: "Customer service is dreadful, the planes are so old they still have cigarette lighter charges in first (but of course no adapters), no food/snacks of any significance, and they seemingly cancel flights at a whim with basically no staff to help re-book the lines of guests that have been disrupted. I pity those who loose luggage AA baggage services are flooded with lost baggage they just don't care any more. Seriously its embarrassing how little they care about customer service."
Cons: "We were delayed for 4 hours, due to a mechanical issue. We were not given any forms of reimbursement. I would like a 500.00 voucher."

We had to run to catch our flight. An announcement should have been made that they would wait for us. When we were departing our flight from Hfx. There was commotion became the flight attendants asked for passengers to wait that weren’t connecting to another flight,a passenger yelled out for everyone to SIT DOWN that weren’t connecting. I feel that the air craft should be exited the same way as is boarded,by zones.Also,if people are connecting then those passengers should be exited first,an announcement to suggest that people wait DOES NOT WORK. So much for social distancing!

Pros: "The boarding was smooth and quick, flight arrived early. Service onboard was very good"
Cons: "We parked at the furthest possible gate in international. Ridiculous walk!!"
Cons: "Online check in was not accessible."
Cons: "Good flight"
Cons: "Delays"
Pros: "No food , no entertainment options ."
Cons: "Have the option to purchase food on a 5 hour flight ."
Cons: "I used Kayak to find my ticket and fill out my information (all kayak logos on top of the page and so on). However, when my confirmation email and e-ticket came in, they were issued by Budgetair.com. I had no experience with them and took it to be a reliable website since they were working with Kayak. However, I had to change/cancel my flight because of delayed passport delivery, and this is when everything turned very Ugly! I had to spend an hour over the phone to get connected to an agent with BudgetAir, who disconnected the line within 2 minutes saying: “please hold so I can pull up your information”. This game went on for 6 hours. I tried to connect with the airline directly to make the change, which was not possible since Budgetair had placed a restriction on this ticket. After 6-7 hours, which meant no work for me or lunch because I was sitting behind my desk with a phone on my hand, I got through an agent who was rude and impolite. He took 15 minutes to find flights for the new dates (I did it in 2 minutes on their website), and then told me to pay $315 in extra fess. When I inquired that the prices on your website for the exact same ticket is way cheaper than my original ticket price, he got angry and aggressive. Basically implying that I have no choice to take their offer as is, or let go of my original ticket price of over $2000. Long story short, DO NOT buy from BudgetAir if you like having a peace of mind!"
Pros: "Seats and plane condition"
Pros: "Liked the comfort of the plane, on time, and smooth touchdown"
Cons: "Food was dried out, crew was extremely slow to dispense beverages and food"
Pros: "On time and all fine. Excellent service and good food."
Pros: "Most of the flight there was strong odor of suer smell"
Cons: "Lack of food choices!"
Cons: "I want to seriously complain about Air Canada and Kayak booking systems. I reserved the tickets to Shanghai but there were no place reminding me that I need Canadian VISA to connect flights between two Canadian cities. I am a Chinese citizen who is working at USA and not allowed to change flights in Canada based on the newest government rules. However, in both booking systems, there is no reminders. In my opinion, either Kayak or Air Canada can add a simple checkbox to let the potential guest choose his or her nationality status, then this kind of trouble can be mitigated. We talked and called Air Canada people but no buying. They kept saying this is our responsibility. We bought United Airline tickets at the last minutes and cost us about $2,400 because we cannot wait to get back China to prepare our wedding ceremony and US Visa interview. We are very very disappointed with Air Canada and will keep complaining about this issue. As a service supplier, how cannot you think on behalf of a customer? The air company definitely knows more about government rules than a customer. We did have mistakes of not researching government rules. However, the biggest mistake was we trusted Air Canada and Kayak who we thought had taken care of those kind of issues for us. Thanks."
Cons: "Delay"
Pros: "Kind and polite service."
Cons: "Again, very rude staff, not helpful at all."
Pros: "Cancelled my original flight plus 2 hour delay. Crew not exactly nice either."
Pros: "Friendly, helpful crew."
Cons: "Awful headphones"
Pros: "There was no entertainment !"
Cons: "Some of the crew were rude no food or drinks No entertainment of any sort for long trips"
Pros: "Crew was nice."
Cons: "Just before boarding it was announced that there would be no hot water on board and passengers should try to run and get a coffee at the airport. 5 hour flight ahead. I didn't have free hand to carry a coffee on board.So no coffee or tea. Also no water in the bathrooms! All meals for purchase were not loaded so no veggies or any gluten free options for purchase. Wanted to buy Duty Free and was told that it wasn't loaded either for some reason. The cabin was a bit cool and after 4 hours of cold drinks I was a bit chilled and asked for a blanket only to discover that they only sell them to the passengers. Then I got the giggles as they thanked us for choosing Air Canada voted number one airline in North America. Hilarious!!!"
Pros: "Movie selection"
Cons: "Everything was ok"
Pros: "Most parts of the flight were normal - nothing exceptional or problematic"
Cons: "N/a"
Pros: "Friendly folks"
Cons: "My flight was first delayed, then cancelled, and there wasn't even bad weather at either airport. I still don't know why the flight was cancelled. My alternate flight had to be from a different airport and that flight was also delayed. I went from a non-stop flight to a flight with a layover... a 7 hour layover. Was not fun sleeping at the airport. On top of that, I had paid to select my seat and it wasn't honored on the flight back. Somehow I was unassigned because of the flight change during departure but I was still charged."
Pros: "Seats"
Pros: "I hated both my trips with Air Canada. I payed extra for a better seat and the one I got was dirty. The tv was NOT working. On top of the 5 hours delay, I hated all the experience. The attendants messages is never clear and focus. It's like Air Canada is employing teenagers with NO work etics or professionalism. I am a frequent flyer and will NEVER flew with Air Canada again. The cheap ticket is not worth the cheap aircraft and cheap service I received."
Cons: "There was absolutely nothing that I found to complain about"
Cons: "dirt and stuff on floor between floor and wall, bad, never seen that before in a nearly new plane"
Pros: "Managed to be on a big plane with leg room. So paid cheap and didn't have to compromise on anything."
Pros: "Easy flight good crew"
Cons: "Lost our baggage"
Pros: "Boarding process was efficient"
Cons: "Entertainment system options did not feature a lot of new content"
Pros: "This was a full sized AB 330-300 which was full. With two aisles - everyone is no more than 1 from an aisle. The desk staff and crew were excellent."
Cons: "They delayed push back for 40 passengers that missed their connection. We left 20 minutes late and arrived only 7 minutes late."
Pros: "Nothing"
Cons: "Everything"
Pros: "Everything went very smoothly...quick and easy flight"
Pros: "I had an exit row seat so the extra room was much appreciated."
Cons: "Aircanada's method of multi zone boarding is a mess. Everyone queues up and blocks whatever zones actually can get on. The seat next to the exit door was freezing. The food was horrible. I understand airplane food is bad but this is some of the worst I have had. Our flight our was fine. There was no inflight entertainment for an 8+ hour flight - you had to rent iPads which is crazy these days. We were late to takeoff due to airport traffic which isn't the airlines fault but then because the customs baggage scanning system went down at Montreal my husband missed his connection - was eventually put on my flight after two trips to ticketing and three calls to aircanada but his bag never arrived in Chicago. We are still waiting for it."
Pros: "Food is okay. No delay on time flight I enjoyed it"
Cons: "So far nothing flight attendants are very nice"
Pros: "Crew service in the plane was very nice, plane was cold and clean as it should,"
Cons: "Lost a flight because they closed the door 20 min before departure, no calls where made to passengers ... I was delayed by airport security and by the time I made it to the gate it was already dispatched, flight closed doors 10 min after it was scheduled to board, very efficient boarding crew that left 6 passengers on the ground !! Since it was a short flight between Toronto and Montreal they gabe me a seat in the next flight which had a delay in boarding (30 min) and then delayed departure too another 30 min ... All in all i spent almost 5 hours in the airport for a 1h flight"
Pros: "Amazing crew!"
Cons: "NO LEG ROOM!!!"
Cons: "it was a horrible experience and i will never fly with air canada again. best of luck"
Pros: "The crew was polite and friendly."
Cons: "The seats were very small. I was flying Premium Economy, so it was tolerable, but my daughters were flying economy with very hard seats, very little room, no snacks and no entertainment. It was the Gulag! I can't imagine it being worse for them. On a short domestic flight, it may be tolerable, but for a long international flight across the pond, it was a nightmare! Also, please stop serving those hot pockets as a snack and please stop charging for potato chips and snacks unless you plan to serve a substantial meal! A 400 calorie meal is not going to keep anyone satisfied for 10 hours!"
Cons: "Always delayed."
Pros: "Good selection of TV and film's"
Pros: "It was a good flight overall."
Pros: "price"
Cons: "crew seemed very busy and did not care of passenger request, I had asked mote than 5 times for a cup of water for my 7 years old daughter and nobody came back with it. I had to be more directive to get it finally."
Pros: "The way back there was nobody beside us. Nice to have extra room."
Cons: "On the way back there was only one person in business class. Nobody got bumped up"
Pros: "Efficient"
Cons: "There could be a better snack..."
Pros: "The staff was generally helpful and pleasant."
Cons: "The airport kiosks were down save one. This created unnecessarily longer wait times for everyone,me specially those that were only looking to get a printed Boarding Pass."
Pros: "Not much"
Cons: "Food is awful and the seats are the most uncomfortable I have ever encountered!"
Pros: "Good onboard entertainment"
Cons: "Overhead cabin extremely small compare to US planes"
Pros: "Nothing"
Cons: "Worst flight ever. Had a technical difficulties 3 times in a row. Had to be cancelled and put on the next day and again same thing over and over. So missed all my connections. Cut short my vacation. Will never flight air Canada again."
Cons: "Boarding was delayed due to crew unavailability. Entertainment did not work due to connectivity issued during flight. No cookies nor snacks were served vs outbound flight where they offered 3 snacks!"
Cons: "The internet connection was terrible i was not able to see anything that was being offered"
Pros: "Very good no complaint at all"
Cons: "I was flying with Air Canada. The UI for watching movies was not good, it had a hard time to respond to the inputs. It was also hard to move the videos forward to the part I needed. Plus, the audio wasn't working well with my own earphones."
Pros: "Getting home."
Cons: "It was an older airplane. For a long flight from Montreal to San Francisco, a plane with more room would be more humane. People were lined up for the bathrooms most of the trip since could not use the small first class bathroom. If one wanted a meal, it was one you had to pay for. Broken monitor"
Cons: "Not delayed every leg of this trip and extend the travel time from 16 hours to 30 hours!"
Pros: "Friendly service"
Cons: "Cramped seating in basic economy, the upgrade seating wasn’t much better"
Pros: "There is nothing to like about Air Canada's Rouge service. Their sardine seat layouts are amongst the worst in the industry."
Cons: "1. Seat comfort. 2. On-time departure. 3. Boarding Procedures. 4. Pre-boarding announcements."
Cons: "No Wi-Fi and no food"
Pros: "Nice flight!"
Cons: "Huge line to take off at Newark Airport"
Pros: "Very good service"
Cons: "Too cramped and no flight entertainment"
Pros: "Lots of leg room for a regional jet."
Cons: "AC was not very good. Very warm on flight."
Pros: "Nothing"
Cons: "Aircraft, cabin crew"
Pros: "Quick boarding, departed on time, arrived early, good cabin communication"
Cons: "This is a very cramped commuter jet, just one flight attendant to serve entire plane, she came by once for drinks but not a second time"
Pros: "Efficient crew. It"
Cons: "It was good overall."
Cons: "Our flight was delayed. We did not make the connecting flight. They would not provide us another flight same day or money back or money for the rental that we required."
Pros: "Crew was extremely friendly."
Cons: "Temperature was way too warm."
Pros: "Boarding and flight went smoothly and on time. Too short for food or entertainment"
Pros: "The crew on the plane was nice and helpful."
Cons: "I understand pretzels for the most part are allergy friendly however I have a gluten intolerance so I couldn’t have them and i couldn’t download the United app because there wasn’t WiFi available anywhere in the terminal and there weren’t any charging stations."
Pros: "Nice attendant, food OK, no delay."
Cons: "Internet costs"
Pros: "Everything was excellent! I even got upgraded to a window seat!"
Pros: "Service was excellent"
Cons: "Never on time"
Pros: "Smooth and positive communication."
Pros: "Crew members were awesome and very attentive both at the airport and on board."
Pros: "smooth flight, good service"
Cons: "hold up to board family with 2 much luggage, overhead bins 2 small"
Pros: "Professional staff, landed safely, the NY skyline is gorgeous"
Cons: "Had to get on a later flight, TSA sucks as usual, I'm too tall for that plane"
Pros: "Fast"
Cons: "Small plane"
Cons: "Flight was delayed so long I missed my connecting flight and spent 18 hours traveling rather than 8."
Pros: "For the most part the ride was nice."
Cons: "Seats were so small"
Cons: "My friends dad passed away and was unable to get money back to go to his funeral. Plane was a small express plane which was never mentioned. Had to check bag because overhead bins were too small. No wifi. Dad and Kid took my assigned seat."
Pros: "Legroom was a bit tight."
Cons: "Flight delay"
Pros: "Easy"
Pros: "Good communication and helpful."
Cons: "Delays"
Pros: "Snack delicious"
Pros: "The boarding process went smoothly and was on schedule."
Cons: "Overhead compartment filled up and it was hard funding space for my bag."
Pros: "Everything was great on the flight- we even got a snack ( stroopwafel cookie reminiscent of when I lived in Amsterdam ) and a drink. I haven't flown united in a while and was pleasantly surprised."
Cons: "Nothing but my flights were short ( under 1 hours)"
Pros: "Good"
Cons: "Good"
Pros: "Nothing"
Cons: "The flight was delayed more times than I can count & cancelled around midnight. AWFUL!"
Cons: "Little more time between flights would be nice"
Cons: "Luggage compartment too small even for a rolling laptop bag"
Cons: "Flight was cancelled. I am still stranded and was given no accommodations so had to pay for a hotel in addition to costing me a full day's wages in missed work. The United staff I spoke with by phone and in person were neither helpful not pleasant. I will go out of my way to never fly United again."
Pros: "Was able to get on an earlier flight"
Pros: "The crew. Short and sweet flight."
Cons: "Small seats. Bad coffee."
Pros: "I like the seats and the leg space .they were very comfortable ."
Cons: "No comment"
Pros: "All the crew were friendly and accommodating."
Cons: "Waiting so long for the flight to actually take off. Very late !"
Cons: "The plane was tiny and the seats were tiny. Could not carry on a bag and it took a long time to get the bag back from having been gate checked."
Pros: "On time"

Book cheap flights from St. Louis to Montreal

Recent round-trip flight deals

19/12Mon
1 stopAir Canada
9h 11mSTL-YUL
29/12Thu
1 stopAir Canada
12h 47mYUL-STL
C$ 628
9/2Thu
1 stopMultiple Airlines
12h 59mSTL-YUL
12/2Sun
1 stopMultiple Airlines
4h 47mYUL-STL
C$ 630
3/3Fri
1 stopAmerican Airlines
8h 11mSTL-YUL
8/3Wed
1 stopAmerican Airlines
5h 59mYUL-STL
C$ 634
8/1Sun
1 stopMultiple Airlines
7h 32mSTL-YUL
13/1Fri
1 stopMultiple Airlines
13h 02mYUL-STL
C$ 645
6/1Fri
1 stopMultiple Airlines
5h 50mSTL-YUL
8/1Sun
1 stopMultiple Airlines
11h 41mYUL-STL
C$ 648
12/4Wed
1 stopMultiple Airlines
10h 00mSTL-YUL
12/7Wed
1 stopMultiple Airlines
5h 40mYUL-STL
C$ 660
12/4Wed
2 stopsMultiple Airlines
9h 39mSTL-YUL
12/7Wed
1 stopMultiple Airlines
5h 40mYUL-STL
C$ 665
19/12Mon
2 stopsAir Canada
8h 24mSTL-YUL
29/12Thu
1 stopAir Canada
11h 47mYUL-STL
C$ 684
19/12Mon
1 stopMultiple Airlines
9h 11mSTL-YUL
27/12Tue
2 stopsMultiple Airlines
7h 36mYUL-STL
C$ 699
9/2Thu
2 stopsAmerican Airlines
11h 04mSTL-YUL
12/2Sun
1 stopAmerican Airlines
11h 44mYUL-STL
C$ 700
30/3Thu
1 stopAir Canada
5h 47mSTL-YUL
4/4Tue
1 stopAir Canada
4h 47mYUL-STL
C$ 704
6/1Fri
1 stopUnited Airlines
7h 32mSTL-YUL
8/1Sun
1 stopUnited Airlines
11h 41mYUL-STL
C$ 711
8/1Sun
1 stopUnited Airlines
7h 32mSTL-YUL
13/1Fri
2 stopsUnited Airlines
10h 43mYUL-STL
C$ 723
19/12Mon
2 stopsAir Canada
8h 24mSTL-YUL
29/12Thu
2 stopsAir Canada
8h 41mYUL-STL
C$ 747
6/1Fri
1 stopUnited Airlines
7h 32mSTL-YUL
8/1Sun
2 stopsUnited Airlines
8h 12mYUL-STL
C$ 760
30/3Thu
2 stopsAmerican Airlines
10h 28mSTL-YUL
4/4Tue
1 stopAmerican Airlines
11h 48mYUL-STL
C$ 797
12/4Wed
2 stopsUnited Airlines
9h 31mSTL-YUL
12/7Wed
2 stopsUnited Airlines
8h 19mYUL-STL
C$ 799
6/1Fri
1 stopAmerican Airlines
19h 12mSTL-YUL
8/1Sun
2 stopsAmerican Airlines
7h 36mYUL-STL
C$ 822
6/1Fri
2 stopsUnited Airlines
10h 13mSTL-YUL
8/1Sun
2 stopsUnited Airlines
8h 12mYUL-STL
C$ 835
13/1Fri
1 stopDelta
8h 01mSTL-YUL
20/1Fri
2 stopsDelta
10h 52mYUL-STL
C$ 1,036

Search by stops

Search by airline

Search by price

St. Louis - Montreal Flights

Departure:

St. Louis (STL)United States

Destination:

Montreal (YUL)Canada

Return flight deals:

Montreal - St. Louis

Cabin classes:

C$ 888

Browse origins:

C$ 630

Browse destinations:

C$ 630