YYC - STL

C$ 181 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 12/10. 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

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
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
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

Fri, 10 Oct - Mon, 13 Oct
American Airlines Logo
1:29 p.m. - 8:09 a.m.YYC-STL
17h 40m1 stop
American Airlines Logo
4:34 p.m. - 12:34 p.m.STL-YYC
21h 00m1 stop
C$ 361American Airlines
Find Deal
Thu, 23 Oct - Sun, 26 Oct
 Logo
12:30 a.m. - 10:16 a.m.YYC-STL
8h 46m1 stop
 Logo
5:15 p.m. - 5:15 p.m.STL-YYC
25h 00m2 stops
C$ 429
Find Deal
Sun, 28 Sep - Wed, 1 Oct
 Logo
8:55 a.m. - 9:06 a.m.YYC-STL
23h 11m1 stop
 Logo
7:55 p.m. - 5:17 p.m.STL-YYC
22h 22m2 stops
C$ 455
Find Deal
Tue, 14 Oct - Tue, 21 Oct
American Airlines Logo
6:45 a.m. - 8:53 p.m.YYC-STL
13h 08m1 stop
American Airlines Logo
8:04 p.m. - 12:34 p.m.STL-YYC
17h 30m1 stop
C$ 460American Airlines
Find Deal
Sun, 28 Sep - Fri, 3 Oct
 Logo
8:55 a.m. - 9:06 a.m.YYC-STL
23h 11m1 stop
 Logo
7:55 p.m. - 8:00 p.m.STL-YYC
25h 05m2 stops
C$ 475
Find Deal
Fri, 24 Oct - Sun, 26 Oct
 Logo
7:35 p.m. - 3:56 p.m.YYC-STL
19h 21m1 stop
 Logo
10:17 a.m. - 11:05 p.m.STL-YYC
13h 48m2 stops
C$ 484
Find Deal
Thu, 25 Sep - Sun, 28 Sep
WestJet Logo
6:00 a.m. - 11:09 p.m.YYC-STL
16h 09m2 stops
WestJet Logo
6:00 a.m. - 3:05 p.m.STL-YYC
10h 05m2 stops
C$ 631WestJet
Find Deal
Mon, 9 Feb - Thu, 19 Feb
WestJet Logo
7:00 a.m. - 11:10 p.m.YYC-STL
15h 10m2 stops
WestJet Logo
8:50 a.m. - 7:12 p.m.STL-YYC
11h 22m2 stops
C$ 669WestJet
Find Deal
Sun, 12 Oct - Sun, 19 Oct
Delta Logo
11:30 a.m. - 11:07 p.m.YYC-STL
10h 37m2 stops
Delta Logo
6:00 a.m. - 1:54 p.m.STL-YYC
8h 54m1 stop
C$ 682Delta
Find Deal
Sun, 28 Sep - Fri, 3 Oct
Delta Logo
7:00 a.m. - 4:45 p.m.YYC-STL
8h 45m2 stops
Delta Logo
12:15 p.m. - 11:02 p.m.STL-YYC
11h 47m2 stops
C$ 786Delta
Find Deal

Everything you should know

Top airlines
American Airlines
Cheapest • from C$ 361 (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
November
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
C$ 361
Typical prices: C$ 533-644
American Airlines
Fri 10/10Mon 13/10
YYC - STL • 1 stop
Cheapest one-way flights
C$ 181
Typical prices: C$ 343-458
Multiple Airlines
Sun 12/10
YYC - STL • 1 stop
Start a new search
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?

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$ 410 (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$ 774 and C$ 707 respectively.

Good to know

Low seasonOctober
Cheapest flightC$ 181
Best time to beat the crowds (0% less expensive on average)
Most popular time to fly (22% 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$ 131 for a one-way ticket and C$ 261 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?

    oneworld, and SkyTeam are the airline alliances operating flights between Calgary and St. Louis, with SkyTeam being the most commonly used for this route.

  • 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$ 655 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$ 690 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 8929 reviews
6.6Food
7.7Boarding
7.3Comfort
8.1Crew
7.1Entertainment
Airline reviews

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

10.0 ExcellentPaulos, Aug 2025YUL - IAD
Read more United Airlines reviews

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.

Airbus plane, nice and polite staff, entertainment even as it was a short flight.

Very nice and clean plane. Transit time between flights was tight though

Our flights got changed from United to Air Canada and our purchased seats did not get transferred so we had to pay for seats twice. I brought it up with Air Canada and they stated I had to go back and chase it with United. The united seats were $21 Canadian each and Air Canada were $56 each so we have paid $77 for each seat. Very unhappy

So far so good but food and entertainment are not available for this flight

Plane temperature was comfortable (not to hot) when boarding and waiting for takeoff.

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.

7 hour layover was a drag. Free internet on the long leg was great.

From vancouver go calgary nd vice vetsa fligjt was delayed

It was good! Short flight and it was on time!

Staff was nice, helpful, and did all they could. I understand economy seats are bottom of the barrel, but we're crammed in there with others in our row.

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

Ground personnel in better mood. Sounded agressive wrt carry on bagage sizing.

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.