YYC - STL

C$ 190 Find Cheap Flights from Calgary 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 Calgary to St. Louis departing on 13/12. 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
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Calgary to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Calgary to St. Louis, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Calgary to St. Louis (YYC-STL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Calgary 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Calgary to St. Louis

Mon, 22 Dec - Tue, 30 Dec
American Airlines Logo
1:31 p.m. - 1:17 p.m.YYC-STL
22h 46m1 stop
American Airlines Logo
8:01 p.m. - 12:51 p.m.STL-YYC
17h 50m1 stop
C$ 348American Airlines
Find Deal
Fri, 26 Dec - Tue, 30 Dec
American Airlines Logo
1:31 p.m. - 8:35 a.m.YYC-STL
18h 04m1 stop
American Airlines Logo
8:01 p.m. - 12:51 p.m.STL-YYC
17h 50m1 stop
C$ 542American Airlines
Find Deal
Thu, 18 Dec - Mon, 22 Dec
American Airlines Logo
1:31 p.m. - 11:45 p.m.YYC-STL
9h 14m1 stop
American Airlines Logo
5:16 p.m. - 12:48 p.m.STL-YYC
20h 32m1 stop
C$ 552American Airlines
Find Deal
Wed, 26 Nov - Mon, 1 Dec
Multiple Airlines Logo
7:35 p.m. - 9:09 p.m.YYC-STL
24h 34m1 stop
Multiple Airlines Logo
7:03 p.m. - 11:44 a.m.STL-YYC
41h 41m2 stops
C$ 584Multiple Airlines
Find Deal
Wed, 26 Nov - Mon, 1 Dec
Multiple Airlines Logo
7:35 p.m. - 9:09 p.m.YYC-STL
24h 34m1 stop
Multiple Airlines Logo
7:03 p.m. - 11:44 a.m.STL-YYC
41h 41m2 stops
C$ 592Multiple Airlines
Find Deal
Wed, 26 Nov - Mon, 1 Dec
WestJet Logo
8:15 p.m. - 6:35 p.m.YYC-STL
21h 20m2 stops
WestJet Logo
6:00 a.m. - 7:15 p.m.STL-YYC
14h 15m2 stops
C$ 726WestJet
Find Deal
Wed, 26 Nov - Mon, 1 Dec
WestJet Logo
7:00 p.m. - 9:59 a.m.YYC-STL
13h 59m2 stops
WestJet Logo
5:17 p.m. - 11:44 a.m.STL-YYC
19h 27m1 stop
C$ 729WestJet
Find Deal
Wed, 26 Nov - Mon, 1 Dec
Air Canada Logo
6:15 p.m. - 12:28 p.m.YYC-STL
17h 13m2 stops
Air Canada Logo
11:05 a.m. - 12:14 a.m.STL-YYC
14h 09m2 stops
C$ 804Air Canada
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Wed, 26 Nov - Mon, 1 Dec
United Airlines Logo
2:13 p.m. - 10:51 a.m.YYC-STL
19h 38m2 stops
United Airlines Logo
5:24 p.m. - 2:21 p.m.STL-YYC
21h 57m3 stops
C$ 997United Airlines
Find Deal
Wed, 26 Nov - Mon, 1 Dec
United Airlines Logo
2:13 p.m. - 12:28 p.m.YYC-STL
21h 15m2 stops
United Airlines Logo
5:24 p.m. - 2:21 p.m.STL-YYC
21h 57m3 stops
C$ 1,078United Airlines
Find Deal

Everything you should know

Top airlines
American Airlines
Cheapest • from C$ 348 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
January
Cheapest • 35% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
C$ 348
Typical prices: C$ 654-C$ 656
American Airlines
Mon 22/12Tue 30/12
YYC - STL • 1 stop
Cheapest one-way flights
C$ 190
Typical prices: C$ 236-C$ 575
Multiple Airlines
Sat 13/12
YYC - STL • 2 stops
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Booking Insights

KAYAK's insights & trends for Calgary to St. Louis flights

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

How much is a round-trip flight from Calgary to St. Louis?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Calgary to St. Louis departing in December.

What’s the cheapest day of the week to fly from Calgary to St. Louis?

The average price of all round-trip flights from Calgary to St. Louis clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Calgary to St. Louis, look for departures on Sundays and avoid leaving on a Friday, as it's usually the priciest day. When flying back from St. Louis, Thursday is the cheapest day to fly and Monday is the most expensive.

What is the cheapest month to fly from Calgary to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Calgary 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 Calgary to St. Louis is January, where tickets cost C$ 413 (return) on average. On the other hand, the most expensive months are November and May, where the average cost of round-trip tickets is C$ 788 and C$ 714 respectively.

Good to know

Low seasonOctober
Cheapest flightC$ 190
Best time to beat the crowds (0% less expensive on average)
Most popular time to fly (2% more expensive on average)
Flight from Calgary to St. Louis

When to book flights from Calgary to St. Louis

Are your dates flexible? Find out the best times to travel from Calgary 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 flights from Calgary to St. Louis

  • What is the cheapest flight from Calgary to St. Louis?

    In the last 3 days, the lowest price for a flight from Calgary to St. Louis was C$ 190 for a one-way ticket and C$ 348 for a round-trip.

  • Which airports will I be using when flying from Calgary to St. Louis?

    Calgary airport is called Calgary and the only airport in St. Louis is Lambert-St Louis.

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

    We unfortunately don’t have that data for this specific route.

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

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

  • Which is the best airline for flights from Calgary to St. Louis, United Airlines or WestJet?

    The two airlines most popular with KAYAK users for flights from Calgary to St. Louis are United Airlines and WestJet. With an average price for the route of C$ 684 and an overall rating of 7.4, United Airlines is the most popular choice. WestJet is also a great choice for the route, with an average price of C$ 680 and an overall rating of 7.2.

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

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

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

  • What is the Hacker Fare option on flights from Calgary 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 Calgary with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Calgary 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 Calgary up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines flying from Calgary to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Calgary 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 Calgary 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.
7.4
United AirlinesOverall score based on 8998 reviews
8.1Crew
7.7Boarding
6.6Food
7.1Entertainment
7.3Comfort
Airline reviews

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

4.0 OkayNicole, Oct 2025IAH - MCI
Read more United Airlines reviews

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

The food quality sucks. One must starve if they do not eat flesh Or wheat based products Some variety would be expected. The trivial amount of snacks and or food is inhumane

We Left Calgary 1/2 hour late and that made for a tight connection in Denver. After arriving everything was done to help us make our connection. That was a great effort. Thank You United

Efficient all round, very good crew. Short flight so the food, of course, was just snacks

Overall, it was good. I was seating next to a wonderful lady and did not notice how time flew. Thanks

My flight was delayed about 1 1/2 hours in Chicago, but other then that it was a good flight.

The experience was great, the crew was very polite and hospitable. I will definitely make if my go to airlines.

It was all good flight was on time, service was good I enjoyed a few movies and everything was smooth

Efficient, calm when things were delayed and kept us regularly informed of what was happening.

I was seated near a "stinky" person. That's not the fault of Westjet🙁😶‍🌫️

The ceiling leaked water on me. The toilets smelled very bad in the rear cabin

When I purchased the flights I included the luggage, the luggage was not added and got charged the full price anyway. Had to pay for the luggage at check in. Initial flight was delayed, we missed our 9am connection (flew with my wife), then the airline rebooks us to the next flights, putting my wife in at 1.40pm and me at 4pm, what a crazy wait time. We managed to fix it with customer service and they put me in the 1:40pm flight too, but they left my baggage behind in the 4pm flight. When arrived to my destination, of course no luggage. It was delivered to the address thankfully late at night. The experience sucked.

Very good experience. Great cabin crew. Much better than expected

Typical Canadian airline experience. Charger and tray were broken, food was poor quality, and yet you're still paying more than flights with equal to better service than elsewhere globally.

Not enough food option. And not enough advices or information about what we are gonna eat.

my carry-on bag was delayed and I did not receive it until the day of my return at the airport. This delay caused me significant inconvenience, as I did not have access to my personal belongings for the duration of my trip. I had expected to rely on my carry-on items, and being without them negatively impacted my travel experience.

Technology issues at the bag-check counter caused a delay, and we were unable to check out our bags, ultimately missing our flight. They offered no assistance other than telling us to book another flight out of Calgary. We arrived with plenty of time; if there hadn't been an issue with the kiosk and the length of the lines due to the technical issues, we could have made it home.

Worst check in and bag drop off experience. Staff were incredibly rude given that it’s the WestJet system that is faulty.

The staff at the airport and on the plane were wonderful I especially wanna acknowledge the staff who boarded us at the Calgary airport. The women who helped us board at the airport were incredible… they were so kind and sweet…I very happy with WestJet and I am hoping I can fly more often to Canada.

Was not sent a link to check in online. Tried to check in online using website. Site didn’t work. Called support line, was told it often didn’t work. Went to counter at airport to check bags and get boarding passes. Had to stand in a lineup. They were unable to tell me how much to pay. Had to take a paper to another counter, took a long time to be told what I owed. I fondly remember the days of checking in online, getting my boarding pass digitally, paying for my luggage on line, scanning my passport at the airport to get my luggage tags, and putting my luggage on the conveyor. Easy peasy. Air Canada has really taken a step back in time, and made what was an easy check in experience to one that seemed unduly long and frustrating.

Really out of Air Canada's control due to long delay because of mechanical issues. While doing their best, disappointed by their assumption that all passengers have smart phones. Should have communicated food voucher availability at gate area. Late arrival cost me an extra $51 because public transit was not available, Otherwise, feel Air Canada did their best dealing with their challenges. Will likely continue using them in the future.

They canceled my flight, I had to rent a car, drive 14 hours. They tell to go on line for a refund, but only offer $24 for a $210 flight and you can’t get hold of anybody by phone and no help from staff at the airport.

I wish to travel with Air Canada for my next trip

They were very attentive, polite, professional and great customer service skills.

Business class was not worth the extra charge. Overpriced for slightly larger seat. Nothing special. Small older plane.

Pros: The airplane was new and had in-flight entertainment (tablet behind seats) with new movies instead of watching on personal devices. Cons: the flight time was changed without informing us. When I booked the flight, the time was 13:30pm (also in the email confirmation). However, when I reached the airport, the time was conveniently changed to 14:55pm. When I asked at the counter, they said the flight always took off at this time. The booking was made by Air Canada, but the flight was operated by United.

The app was great, service was wonderful, everything was quick and easy

On the flight from Montreal to Calgary the flight attendant we had was excellent. Unfortunately I did not get her name but she made the flight very comfortable and enjoyable.

Like- beer/wine for free Dis-like- all other aspects- customer service was horrible the entire trip. No help from Air Canada after they changed flight 6+ hours later. Also they put us on standby for no reason. Then almost 2 hours to get our bags after we arrived back at airport

Everything you need to know for your flight from Calgary to St. Louis

Information on your arrival and departure airports

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