YYC - STL

C$ 244 Find Cheap Flights from Calgary to St. Louis – Compare and Save

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 20/8. 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

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Everything you should know

Cheapest round-trip
C$ 409
Typical prices: C$ 543-C$ 810
Multiple Airlines
Wed 21/10Sun 25/10
YYC - STL • 1 stop
Cheapest one-way flights
C$ 244
Typical prices: C$ 353-C$ 492
Multiple Airlines
Thu 20/8
YYC - STL • 1 stop
Top airlines
Cheapest • from C$ 499 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
Not available
There are currently no direct flights between Calgary and St. Louis. You’ll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg C$ 496 (round-trip)
Shortest trip • 5h 51m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 37% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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!
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

Wed, 21 Oct - Sun, 25 Oct
Multiple Airlines Logo
12:20 a.m. - 9:40 a.m.
YYC
-
STL
8h 20m
1 stop
Multiple Airlines Logo
10:35 a.m. - 7:14 p.m.
STL
-
YYC
9h 39m
1 stop
C$ 409Multiple Airlines
Sun, 11 Oct - Fri, 16 Oct
Multiple Airlines Logo
12:20 a.m. - 9:40 a.m.
YYC
-
STL
8h 20m
1 stop
Multiple Airlines Logo
10:35 a.m. - 11:00 a.m.
STL
-
YYC
25h 25m
1 stop
C$ 442Multiple Airlines
Sun, 11 Oct - Fri, 16 Oct
Multiple Airlines Logo
12:20 a.m. - 9:40 a.m.
YYC
-
STL
8h 20m
1 stop
Multiple Airlines Logo
10:35 a.m. - 11:00 a.m.
STL
-
YYC
25h 25m
1 stop
C$ 447Multiple Airlines
Fri, 28 Aug - Sun, 30 Aug
WestJet Logo
11:05 a.m. - 11:26 p.m.
YYC
-
STL
11h 21m
2 stops
WestJet Logo
6:20 a.m. - 7:40 p.m.
STL
-
YYC
14h 20m
2 stops
C$ 515WestJet
Fri, 4 Sep - Mon, 7 Sep
WestJet Logo
8:20 a.m. - 8:42 p.m.
YYC
-
STL
11h 22m
2 stops
WestJet Logo
6:20 a.m. - 5:00 p.m.
STL
-
YYC
11h 40m
2 stops
C$ 526WestJet
Tue, 11 Aug - Sat, 15 Aug
WestJet Logo
11:40 a.m. - 9:54 a.m.
YYC
-
STL
21h 14m
1 stop
WestJet Logo
5:33 p.m. - 11:00 a.m.
STL
-
YYC
18h 27m
1 stop
C$ 533WestJet
Mon, 12 Oct - Fri, 16 Oct
Delta Logo
6:35 a.m. - 5:44 p.m.
YYC
-
STL
10h 09m
1 stop
Delta Logo
12:28 p.m. - 8:40 p.m.
STL
-
YYC
9h 12m
1 stop
C$ 703Delta
Sat, 8 Aug - Wed, 12 Aug
Delta Logo
6:45 a.m. - 4:44 p.m.
YYC
-
STL
8h 59m
1 stop
Delta Logo
8:48 a.m. - 12:55 p.m.
STL
-
YYC
5h 07m
1 stop
C$ 783Delta
Sat, 8 Aug - Tue, 18 Aug
Delta Logo
6:45 a.m. - 4:44 p.m.
YYC
-
STL
8h 59m
1 stop
Delta Logo
2:32 p.m. - 11:04 p.m.
STL
-
YYC
9h 32m
1 stop
C$ 783Delta
Mon, 17 Aug - Tue, 25 Aug
Air Canada Logo
7:45 p.m. - 2:02 p.m.
YYC
-
STL
17h 17m
1 stop
Air Canada Logo
12:10 p.m. - 11:47 a.m.
STL
-
YYC
24h 37m
3 stops
C$ 1,037Air Canada
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 October.

Flight prices are below average for this route right now.

Flights to St. Louis from Calgary usually cost between C$ 605 and C$ 712 in October.
The lowest price found in the past 5 days was C$ 409 on Multiple Airlines (21 Oct–25 Oct).

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 May, where tickets cost C$ 451 (return) on average. On the other hand, the most expensive months are June and November, where the average cost of round-trip tickets is C$ 979 and C$ 907 respectively.

Good to know

Low season

February

Cheapest flight

C$ 244
Best time to beat the crowds but there is an average 19% increase in price.
Most popular time to fly and prices are also 4% lower 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 5 days, the lowest price for a flight from Calgary to St. Louis was C$ 244 for a one-way ticket and C$ 409 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, and SkyTeam are the airline alliances operating flights between Calgary and St. Louis, with Star Alliance being the most commonly used for this route.

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

    The two airlines most popular with KAYAK users for flights from Calgary to St. Louis are Delta and WestJet. With an average price for the route of C$ 554 and an overall rating of 7.8, Delta is the most popular choice. WestJet is also a great choice for the route, with an average price of C$ 713 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.
7.8
DeltaOverall score based on 8485 reviews
7.2Food
8.5Crew
7.8Comfort
7.8Entertainment
8.1Boarding
Airline reviews

20 year old 737 but really poor service from the flight attendants who must have been new.

2.0 MediocreJames, Jul 2026
YYZ - SLC
Read more Delta reviews

20 year old 737 but really poor service from the flight attendants who must have been new.

We departed early and made up time in the air allowing us to arrive 30 minutes early. Capt was incredibly genuine and thanked every passenger for flying with Delta. Completely humble and professional!

The boarding process needs to be refined. Sometimes the gate crew calls out the zones and then flip to showing the.zones boarding on the gate monitor display. So, unless you are huddled around the gate lanes watching the monitor, you could miss your boarding zone. Suggest the zones be announced each time a new zone is allowed to board.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

It was beautiful easy and smooth experience. Thank you. Will definitely get Delta for my next travel.

On 2 different flights the wifi was horrible and there was no drink or snack service.

There was no FREE wi-fi nor entertainment screens at all.

Great, on time departure, friendly and accommodating crew, great leg room, Smith flight

As we lined up to board they gave our plane to a flight going to Newark. So then we got delayed until they could find another plane. Flight crew was ok. I’m assuming since it’s a shorter flight they only offered water and coffee.

Ran out of my choice of main course in BClass. Kind of weird combo for substitute.

Despite travelling ultra basic for the first time due to such increased rates we both managed with one bag each. Even boarding last wasn’t SO bad.

Flight was early. That’s the only positive I can share. I paid for wifi on the flight and it didn’t allow me to use any streaming services so it was a waste of $20. West Jet also lost my ski equipment on my way to a ski vacation. They told me it would be delivered to the hotel as soon as it arrived at the airport. It was never delivered. I had to pick it up at the airport on my way home. I am completely disgusted with my experience on west jet

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

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.

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.

Crew was friendly. Lost our luggage and told us it’d be in later in the evening of the day we returned. It was not. Still after 5 days have not received it.

It took 30 minutes to check in with the Westjet rep. They didn’t have enough seats and she needed to make a call… I am always “randomly” selected to be checked at security. Their “randomly “ selection system may need some updating. They treat people like criminals. It is not appropriate behavior.

My experience was good with United too But only not so good thing was that at Calgary airport I was not given lounge access despite of flying business. Aspire lounge denied it to me, which was unfair I feel

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.

United did not permit online check-in from home as document scans were not getting uploaded. This should be fixed their app

Flights delayed over 4 hours with no compensation. No agents at counters to assist with re-booking.

Seriously need to improve the time schedule and the plans

It took 5 hour to get a crew to D Ice the plan. We had to sit on the runway for 5 hrs. in Calgary. It snows most of the winter. No proactive plan. In addition, after 3 calls to customer service they couldn't figure out how to have my wife and myself sit together on her birthday weekend. Everybody kept passing the buck. No decision from customer service, luggage drop off or check in team. The experience was a complete mess! I don't think we'll ever fly on this airline again.

The wifi I paid for did not work. The seats are tight.

There were no free snacks…little pretzel bag or cookies like we had on our flight out.

We culd not check in ovr the inrnt since e did not have the unied airlns boing efence Tis is alays a issue when boing coe shae flits witstr allince

They could have served at least some cookies with coffee or tea or juice.

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

Information on your arrival and departure airports