YYC - STL

$180 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 9/17. 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
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Flights 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

Thu, Aug 28 - Tue, Sep 2
 Logo
8:55 am - 9:11 amYYC-STL
23h 16m1 stop
 Logo
7:54 pm - 2:45 pmSTL-YYC
19h 51m1 stop
Fri, Sep 5 - Sat, Sep 13
American Airlines Logo
6:29 am - 11:30 amYYC-STL
28h 01m1 stop
American Airlines Logo
6:10 am - 11:19 pmSTL-YYC
18h 09m1 stop
$320American Airlines
Find Deal
Fri, Sep 26 - Sun, Sep 28
 Logo
8:55 am - 9:06 amYYC-STL
23h 11m1 stop
 Logo
12:05 pm - 6:24 pmSTL-YYC
7h 19m1 stop
Wed, Aug 27 - Tue, Sep 2
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12:30 am - 1:07 pmYYC-STL
11h 37m2 stops
 Logo
7:54 pm - 2:45 pmSTL-YYC
19h 51m1 stop
Sun, Aug 31 - Wed, Sep 3
American Airlines Logo
6:29 am - 8:18 pmYYC-STL
12h 49m1 stop
American Airlines Logo
9:56 am - 11:19 pmSTL-YYC
14h 23m1 stop
$370American Airlines
Find Deal
Thu, Sep 25 - Sun, Sep 28
Air Canada Logo
12:20 am - 3:18 pmYYC-STL
13h 58m1 stop
Air Canada Logo
1:30 pm - 11:16 pmSTL-YYC
10h 46m1 stop
$407Air Canada
Find Deal
Wed, Aug 13 - Sat, Aug 16
United Airlines Logo
6:15 am - 9:50 pmYYC-STL
14h 35m1 stop
United Airlines Logo
8:54 am - 9:48 pmSTL-YYC
13h 54m1 stop
$429United Airlines
Find Deal
Fri, Sep 5 - Sat, Sep 13
Air Canada Logo
8:00 am - 7:38 pmYYC-STL
10h 38m1 stop
Air Canada Logo
9:15 am - 6:25 pmSTL-YYC
10h 10m2 stops
$437Air Canada
Find Deal
Wed, Aug 13 - Sat, Aug 16
Delta Logo
6:40 am - 2:29 pmYYC-STL
6h 49m1 stop
Delta Logo
3:30 pm - 10:57 pmSTL-YYC
8h 27m2 stops
$453Delta
Find Deal
Thu, Aug 28 - Tue, Sep 2
Delta Logo
7:55 am - 5:47 pmYYC-STL
8h 52m1 stop
Delta Logo
11:29 am - 10:57 pmSTL-YYC
12h 28m2 stops
$476Delta
Find Deal
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.

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 Fridays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from St. Louis, Tuesday is the cheapest day to fly and Sunday 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 $296 (return) on average. On the other hand, the most expensive months are November and May, where the average cost of round-trip tickets is $558 and $511 respectively.

Good to know

Low seasonDecember
Cheapest flight$180
Best time to beat the crowds but there is an average 5% increase in price.
Most popular time to fly with an average 25% increase in price.
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 $180 for a one-way ticket and $305 for a round-trip.

  • Do I need a passport to fly between Calgary and St. Louis?

    Yes, you’ll need a passport to travel to St. Louis from Calgary.

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

    When flying out of Calgary you will be using Calgary. You will be landing at St. Louis, also known as 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, Star Alliance, and SkyTeam are the airline alliances operating flights between Calgary and St. Louis, with oneworld being the most commonly used for this route.

  • 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. Booking your flights between Calgary and STL can sometimes prove cheaper using this method.

  • 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 airline 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.
7.2
American AirlinesOverall score based on 10000 reviews
7.2Comfort
7.5Boarding
6.5Food
8.0Crew
6.9Entertainment
Airline reviews

Very poor delay in dfw was really bad n long

2.0 Mediocredavix, Jul 2025DFW - MKE
Read more American Airlines reviews

Very poor delay in dfw was really bad n long

Our flight was 1.5 hours delayed. There was no weather for the inbound flight, so I don't understand why. This meant a VERY late arrival and only a quick nap before my morning flight.

Because of rescheduling, they had to put me on a flight that didn't go through Dallas

It was very difficult to stretch my knee out and I am very short. I also had a torn tendon in my knee which made it extra uncomfortable anyways. My husband is 6'2" and I can't imagine him flying in that plane.

3 hour weather delay followed by 1 hour (and counting) maintenance delay. UGH!

Couldn’t get the door on the plane to close leading to a nearly 2 hour delay. But, hey at least they didn’t cancel the flight.

Very clean and comfortable cabin. Amazing Mediterranean salad for lunch before landing. Great range of films to watch. Really quiet and easy to sleep on the flight also. The initial food was a bit weird: odd fried chicken pieces in some weird white gloop, but that would be my lack of cultural knowledge on the grub. Salad more than made up for it at the other end. Staff were super attentive and helpful. Great and easy flight

International baggage recheck process in Philadelphia was a disaster. Waited 1 hour and 45 minutes to receive our bags. Waited 15 minutes to recheck bags, flight notification boards were blank so we asked an AA representative for our connecting gate and we were directed to the wrong terminal and gate. Our connection window was over 3 hours and we made our flight by 5 minutes. We pulled away from the gate and sat on the runway for 1 1/2 hours. 1 of our 4 bags didn’t make it to Phoenix. The mobile app for lost baggage didn’t work, the AA rep had to manually fix.

I miss my flight and they could not rebook me that day because the other flight was full, and for the next day I had to pay a whole new fee again which I think is unprofessional

Flight was cancelled 3 hrs AFTER etd. Thetefore Missed connection from JFK to New Zealand . No accommodation provided… This cost ne aporox 1000 USD in extra expenses and turned whst should have been a 24 hr trip ftom Boston - New Zealand into a VERY expensive , late 70+ hr nightmare … Complete nonsense!!!

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

Information on your arrival and departure airports

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