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YUL - STL

C$ 233 Find cheap flights from Montreal to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Montreal to St. Louis departing on 3/6. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sun 16/6
Sun 23/6

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Montreal to St. Louis.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Montreal to St. Louis.
In the last 7 days, travellers have searched 42,332,103 times on KAYAK, and here is why:

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Cheap flight deals from Montreal to St. Louis (YUL-STL)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Montreal to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
7:30 a.m. - 2:29 p.m.YUL-STL
7h 59m1 stop
6:00 p.m. - 11:02 p.m.STL-YUL
4h 02m1 stop
C$ 527Delta
Find Deal
Sat, 7 Sep - Tue, 10 Sep
7:50 a.m. - 4:10 p.m.YUL-STL
9h 20m1 stop
5:30 a.m. - 10:44 p.m.STL-YUL
16h 14m1 stop
C$ 537American Airlines
Find Deal
Fri, 16 Aug - Wed, 21 Aug
7:00 a.m. - 10:46 a.m.YUL-STL
28h 46m3 stops
10:34 a.m. - 12:33 a.m.STL-YUL
12h 59m2 stops
C$ 558
Find Deal
Tue, 28 May - Tue, 4 Jun
7:00 a.m. - 10:46 a.m.YUL-STL
28h 46m2 stops
10:34 a.m. - 12:33 a.m.STL-YUL
12h 59m2 stops
C$ 571
Find Deal
Tue, 28 May - Tue, 4 Jun
7:00 a.m. - 12:19 p.m.YUL-STL
6h 19m1 stop
3:28 p.m. - 11:10 p.m.STL-YUL
6h 42m1 stop
C$ 584Delta
Find Deal
Thu, 4 Jul - Sun, 21 Jul
10:10 a.m. - 3:21 p.m.YUL-STL
6h 11m1 stop
12:00 p.m. - 3:23 p.m.STL-YUL
2h 23mdirect
C$ 588Air Canada
Find Deal
Thu, 4 Jul - Sun, 21 Jul
7:00 a.m. - 10:46 a.m.YUL-STL
28h 46m3 stops
10:34 a.m. - 12:15 p.m.STL-YUL
24h 41m3 stops
C$ 597
Find Deal
Tue, 28 May - Tue, 4 Jun
7:30 p.m. - 9:05 p.m.YUL-STL
2h 35mdirect
10:10 a.m. - 6:16 p.m.STL-YUL
7h 06m1 stop
C$ 618Air Canada
Find Deal
Sat, 7 Sep - Tue, 10 Sep
7:30 p.m. - 9:05 p.m.YUL-STL
2h 35mdirect
8:25 a.m. - 2:36 p.m.STL-YUL
5h 11m1 stop
C$ 632United Airlines
Find Deal
Fri, 16 Aug - Wed, 21 Aug
8:00 p.m. - 3:40 p.m.YUL-STL
20h 40m2 stops
6:02 a.m. - 1:16 p.m.STL-YUL
6h 14m1 stop
C$ 658United Airlines
Find Deal
Fri, 16 Aug - Wed, 21 Aug

Flights from Montreal to St. Louis - Travel Insights & Trends

Get data-powered insights and trends into flights from Montreal to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis is February, where tickets cost C$ 504 on average. On the other hand, the most expensive months are July and August, where the average cost of tickets is C$ 859 and C$ 812 respectively.

How far in advance should I book a flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 57 days before departure.

Which airlines provide the cheapest flights from Montreal to St. Louis?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from Montreal to St. Louis found on KAYAK was with Delta for C$ 304. Delta proposed a round-trip connection from C$ 527 and American Airlines from C$ 537.

Which airlines fly direct between Montreal Pierre Elliott Trudeau Intl Airport and St. Louis?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis.
There is just one airline that flies from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis direct and that is Air Canada. The best one-way deal found from Air Canada for the route is C$ 325.

How many flights are there between Montreal Pierre Elliott Trudeau Intl Airport and St. Louis per day?

There is a maximum of 1 nonstop flight a day that takes off from Montreal Pierre Elliott Trudeau Intl Airport and lands in St. Louis, with an average flight time of 2h 35m. The most common departure time is 7:00 p.m. and most flights take off in the evening. Each week, there are 7 flights.

Which cabin class options are there for flights between Montreal Pierre Elliott Trudeau Intl Airport and St. Louis?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There is only one cabin class option available for the route, which is Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How long does a flight from Montreal to St. Louis take?

A direct flight to St. Louis will take on average 2h 35m to travel the 2,504 km flying distance from Montreal.

What’s the earliest departure time from Montreal to St. Louis?

Early birds can take the earliest flight from Montreal Pierre Elliott Trudeau Intl Airport at 7:30 pm and will be landing in St. Louis at 9:05 pm.

What’s the latest departure time from Montreal to St. Louis?

If you prefer to fly at night, the latest flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis jets off at 7:30 pm and lands at 9:05 pm.

Good to know

Low season

January

High season

October

Cheapest flight

C$ 233
Best time to beat the crowds (20% less expensive on average)
Most popular time to fly (8% more expensive on average)
Flight from Montreal to St. Louis

When to book flights from Montreal to St. Louis

Are your dates flexible? Find out the best times to travel from Montreal to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Montreal to St. Louis flights

  • What is the cheapest flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis?

    In the last 3 days, the lowest price for a flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis was C$ 171 for a one-way ticket and C$ 387 for a round-trip.

  • Which airlines offer Wi-Fi service onboard planes from Montreal to St. Louis?

    Only Air Canada offers inflight Wi-Fi service on the Montreal to St. Louis flight route.

  • Which aircraft models fly most regularly from Montreal to St. Louis?

    The Canadair (Bombardier) Regional Jet 900 is the aircraft model that flies most regularly on the Montreal to St. Louis flight route.

  • Which airline alliances offer flights from Montreal to St. Louis?

    Star Alliance is the only airline alliance operating flights between Montreal and St. Louis.

  • On which days can I fly direct from Montreal to St. Louis?

    There are direct flights from Montreal to St. Louis on a daily basis.

  • Which is the best airline for flights from Montreal to St. Louis, Delta or WestJet?

    The two airlines most popular with KAYAK users for flights from Montreal to St. Louis are Delta and WestJet. With an average price for the route of C$ 631 and an overall rating of 8.0, Delta is the most popular choice. WestJet is also a great choice for the route, with an average price of C$ 848 and an overall rating of 7.5.

  • How does KAYAK find such low prices on flights from Montreal to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Montreal to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Montreal to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Montreal is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Montreal to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Montreal with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Montreal to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Montreal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

KAYAK’s top tips for finding a cheap flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 565 or less round-trip.

Prefer to fly non-stop from Montreal to St. Louis?

Find which airlines fly direct from Pierre Elliott Trudeau Intl to Lambert-St Louis, which days they fly and book direct flights.

Nonstop departures

Montreal Pierre Elliott Trudeau Intl to Lambert-St Louis

Monday

Air Canada,United Airlines

Air Canada,United Airlines

Tuesday

Air Canada,United Airlines

Air Canada,United Airlines

Wednesday

Air Canada,United Airlines

Air Canada,United Airlines

Thursday

Air Canada,United Airlines

Air Canada,United Airlines

Friday

Air Canada,United Airlines

Air Canada,United Airlines

Saturday

Air Canada,United Airlines

Air Canada,United Airlines

Sunday

Air Canada,United Airlines

Air Canada,United Airlines

See more nonstop flights

Nonstop returns

Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl

Monday

Air Canada,United Airlines

Air Canada,United Airlines

Tuesday

Air Canada,United Airlines

Air Canada,United Airlines

Wednesday

Air Canada,United Airlines

Air Canada,United Airlines

Thursday

Air Canada,United Airlines

Air Canada,United Airlines

Friday

Air Canada,United Airlines

Air Canada,United Airlines

Saturday

Air Canada,United Airlines

Air Canada,United Airlines

Sunday

Air Canada,United Airlines

Air Canada,United Airlines

See more nonstop flights
See more nonstop flights

Top 5 airlines serving from Montreal to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Montreal to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Montreal to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.1
WestJet EncoreOverall score based on 45 reviews
7.1Food
8.6Crew
8.5Boarding
7.5Comfort
7.3Entertainment
Airline reviews

Great flight, comfort, and staff. Prefer tv in back of seat but watching on phone will do

10.0 ExcellentDarren, May 2023YYZ - LAX
Read more about WestJet Encore reviews

Great flight, comfort, and staff. Prefer tv in back of seat but watching on phone will do

Pros: "Friendly staff and the support they offered to my mother who needed a wheelchair."
Cons: "I would have liked to have had WestJet internet and entertainment access. It was not offered on our flight from Toronto to Fredericton."
Pros: "The fact that military personnel and retired military personnel and their spouse can check in luggage for free. The check in crew was also very courteous."
Pros: "It ran on time. The pilot landed the plane without a big jolt. We could board and deplane using 2 exits."
Cons: "Seat space"
Pros: "Rotten stuff cancels out the good doesn't it. Be great if you could take some courses from Stephen Covey as you are missing some skills sets in hospitality. And stop being so cheap with the 3rd rate old old movies!"
Cons: "I did not appreciate having the second row to the last on my 2nd plane coming back - I only had a turn around time of 20 minutes to catch my third Westjet flight. When we asked if the plane would wait for us - your crew just laughed in our faces."
Pros: "Great, friendly crew in this scenic trip across to Victoria. Nice new aircraft operating this route."
Pros: "Cheerfulness of WestJet employees."
Cons: "Seat comfort; seats hard. Person next to me average size but still spilled into my seat with “man-spreading” and shoulders."
Pros: "Efficient crew and reasonable seating"
Cons: "Need more legroom or a device to fold passenger legs for the flight duration..."
Pros: "Crew was good. Seats need to be updated and are confining. I appreciated being able to disembark through front and rear door."
Cons: "More space between the seats."
Pros: "the crew was very polite but the flight was too short to have a meal"
Cons: "delayed embarking"

The Flight crew didn’t serve us until about 1.5 hours into the flight because of turbulence but after it ended it was fine to move around. They served us water only and snacks and then NEVER, NOT ONE TIME came through to collect trash until right before landing about 1.5 hours later. There was absolutely no need for that. They crew was just standing around talking and visiting with each other and really never tried to see if we might want something besides water or even try to come pick up trash. This is VERY unusual for a Delta flight but it was not what I would have expected for a 4 hour flight.

The 1st class male crew member was very pleasant - the short female with round glasses , maybe in 50’s had no personality- never spoke when delivering my food, drink, & never smiled the whole trip! In fact looked annoyed when the boarding proses was happening- I would never hire this woman - unfriendly . Have never dealt with a crew member like her-

5-hour delay due to storms in Tanoa and airspace restricted by Miami traffic controllers.

A regional sized plane was used for a cross country flight with no overhead bin space. I had to "pink check" my laptop and my medications. I was NOT pleased!!!!

Absolutely nothing flight was cancelled and delayed for 2 days. Barely a heads up I want a full refund

The plane from SNA wouldn’t start after 5 tries. The team gave me an option of flying direct from LAX and giving me a Lyft ride there! Perfect!

Best airline! Always friendly and welcoming. Skyclub was great and loved the fast free wifi on board. I also love that you can pre-order your meal on the app!

Atlanta boarding crew at gate were filled with arrogance and were disrespectful. In flight crew showed indifference to the needs of passengers. This is about the flight from ATL to BDL.

The boarding was horrible. You couldn’t hear the announcements at all. Probably because there is so much in the area for businesses. They need a louder PA system. Other than that it was a good Delta experience.

Boarding was somewhat chaotic. Unable to evaluate crew or food/drink because captain kept them seated due to turbulence. Have no idea if entertainment was offered.

Was the longest flight I have ever taken to Orlando. Not Westjet’s fault necessarily. There was a traffic issue in Orlando. We sat in the airplane for about 2 hrs before leaving Calgary on a 5 hour flight was just a little long to be stuck in the plane. Once we arrived in Orlando we were stuck in traffic on the ground for another 30min. I guess maybe the flight could be delayed so boarding would have been later so we wouldn’t have to have the discomfort of being on the plane so long.

Airport monitors did not give the gate for our flight returning Detroit to Vancouver Juice served from glass storage containers are a far more healthy alternative for people. And would also minimize the need for recycling plastic or aluminum containers

I wish that seats closer to the front of the plan were available, but when I booked the flight the seats were VERY expensive so I did not book seats at that time. The day before flying only seats at the back of the plane were available. It takes so long to board the plane and empty the plane on arrival due to SO many roller bags.

Good flight. No I’m seat entertainment. But my phone worked just fine on the west jet app.

I had planned to watch the Westjet entertainment for the entire flight however, because the seat mounted outlets in our row did not work.

Not a bad flight but our priority tagged luggage was the very last to come down the carousel.

Plane had a flat tire, delayed boarding and takeoff but one in the air, smooth. Make sure you have downloaded the WJ app before you leave. When on board, you can watch movies or TV shows offered on the app, it passed the time very quickly.

Our recent flight from edmontown to kahalui was excellent. The service staff was very friendly, knowledgeable, funny and attentive. Thanks to all involved that made or travel such a pleasant experience and we hope to fly with west jet again soon

The flight was delayed and I missed boarding my 7 day cruise. I had to book a separate flight home

No real issues just wasnt able to hear / understand any announcements flight attendant was making but everything else was really good- ended up checking my carry on case for free which made deboarding quicker. I would fly West Jet for all my flights.

We enjoyed that we boarded and took off on time. We didn’t like that our connection flight was a twenty minute walk through the airport with only one hour in between flights.

It was good! Appreciated that it was very on schedule so it made the connecting flight less stressful

Two flights,both poor. No entertainment. Cramped and uncomfortable seats, little space, the rest was OK. Staff were acceptable good.

Last minute gate change nearly caused us to miss our flight. Change was not announced or displayed in the main board at the old gate. Terrible communication. When we landed we had to wait 20 minutes because there was another plane at the assigned gate. Not the crew’s fault, but adding 20 minutes to a 45 minute flight sucked.

The crew was doing their best on an old plane needing updating. Chairs that creaked and wouldn’t stay in position. My tray table was unusable as was on-board entertainment due the audio needing usb earphones (that were not provided). Prior to boarding in Toronto and despite being scheduled for a wheelchair and assistance, we were dropped off by clubcar without a wheelchair which I found myself by a gate. Due to no boarding gate assigned at that time we waited and when it was, it subsequently was moved from 64 to 95. No help could be found so I pushed my husband’s chair to that furthest gate in the airport at the highest speed possible for a 73 year old. And by that I mean I ran. It was a very stressful experience.

Wifi wasn't working on one of the UA flights after boarding.

Leg room was lacking. Legs crammed into seat in front.

T hey did a great job. Flight was on time .

the plane was old. the wifi didn’t work. the entertainment was boring and dated. the charging ports were impossible to find. i was mostly ignored by flight attendants that had no problem speaking to the man beside me. i got two drinks the entire time i was on the plane.

Crew was not very helpful. They forgot to serve me coffee and had to wait for a long time.It looked as if they were not very happy with what they were doing.

Seriously need to improve the time schedule and the plans

Pretty good service and US Migratory officers providing services in Canada was awesome, because the arrival was quick and smooth

Rouge needs to offer seats with better pitch in economy. Many sick people on a full flight.

Overall, I would have to say my experience with Air Canada was mediocre their DC tens. Need to be updated not comfortable at all. Only one out of my four flights was decent. The staffing was very nice. Going through customs in Montreal was quick and easy. Air Canada has room for improvement with their facilities.

Flight was delayed, I had to put my luggage all the way in the back! They served only a beverage no snack on the way in Air Canada, definitely not a good first impression.

When we got to the airport for our flight from Chicago to Montreal which was scheduled for 2.00 p.m. they had no record of it and booked us on a flight at 3.30 very disappointing . We also had to pay 50.00 each for a seat. All things considered ,I will never book thru Kayak again. Next time I will only book directly thru Air Canada no second party booking Sue

My flight has been canceled and I had to cancel entire trip.

No food for a 6 hours flight! Plus very expensive to buy ! Sit uncomfortable! Awful!!!

There was no food on this flight. We had less than 1/3 full plane and were not allowed to spread out. Staff gave the story of the plane had to have all of us up front for 'balance.' Total bs.

There were changes to my flight with many email and very difficult to keep up with details of changes. I consulted Air Canada website that said I was to depart Casablanca at 9:35 but when I got to airport that take off time was delayed by 2 hours. That's 2 hours at an airport instead of bed. I don't understand why Air Canada website didn't show the change in take off like they showed the change in transfer. Do better.

Book cheap flights from Montreal to St. Louis

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Montreal to St. Louis found on KAYAK in the last 72 hours.
3/6Mon
1 stop
19h 03mYUL-STL
C$ 233
3/6Mon
3 stops
21h 52mYUL-STL
C$ 283
7/8Wed
1 stopDelta
8h 50mYUL-STL
C$ 304
20/7Sat
1 stopDelta
5h 53mYUL-STL
C$ 305
13/9Fri
1 stopAmerican Airlines
16h 28mYUL-STL
C$ 311
19/7Fri
1 stopWestJet
17h 39mYUL-STL
C$ 339
3/6Mon
2 stopsWestJet
27h 25mYUL-STL
C$ 346
12/9Thu
directAir Canada
2h 35mYUL-STL
C$ 353
20/6Thu
1 stopAir Canada
7h 11mYUL-STL
C$ 362
18/7Thu
directUnited Airlines
2h 35mYUL-STL
C$ 753

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Montreal - St. Louis Flights

Departure:

Montreal (undefined)Canada

Destination:

St. Louis (STL)United States

Return flight deals:

St. Louis - Montreal

Cabin classes:

C$ 1,160
C$ 316