YYC - STL

$194 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 5/20. 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

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 Flight Deals 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.

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

KAYAK's recommended round-trip deals from the most popular airlines that fly from Calgary to St. Louis.
Discover the best prices for you by selecting your travel dates on KAYAK.
United Airlines Logo
6:15 am - 9:03 pmYYC-STL
13h 48m1 stop
United Airlines Logo
5:27 pm - 10:53 pmSTL-YYC
6h 26m1 stop
$358United Airlines
Find Deal
Fri, Jun 13 - Mon, Jun 23
American Airlines Logo
6:45 am - 6:31 pmYYC-STL
10h 46m1 stop
American Airlines Logo
5:37 am - 11:50 amSTL-YYC
7h 13m1 stop
$367American Airlines
Find Deal
Mon, Jun 9 - Mon, Jun 16
British Airways Logo
6:45 am - 11:19 pmYYC-STL
15h 34m1 stop
British Airways Logo
8:35 am - 11:29 pmSTL-YYC
15h 54m1 stop
$372British Airways
Find Deal
Fri, Jun 20 - Mon, Jun 30
Delta Logo
6:45 am - 11:53 pmYYC-STL
16h 08m2 stops
Delta Logo
2:23 pm - 10:57 pmSTL-YYC
9h 34m1 stop
$384Delta
Find Deal
Fri, Jul 11 - Mon, Jul 21
WestJet Logo
7:00 am - 8:39 pmYYC-STL
12h 39m2 stops
WestJet Logo
10:30 am - 6:28 pmSTL-YYC
8h 58m1 stop
$394WestJet
Find Deal
Tue, Jun 3 - Wed, Jun 11
WestJet Logo
12:30 am - 4:25 pmYYC-STL
14h 55m1 stop
WestJet Logo
10:48 am - 8:05 pmSTL-YYC
10h 17m1 stop
$397WestJet
Find Deal
Sun, Jun 8 - Mon, Jun 16
Delta Logo
6:45 am - 4:53 pmYYC-STL
9h 08m1 stop
Delta Logo
11:17 am - 6:40 pmSTL-YYC
8h 23m2 stops
$411Delta
Find Deal
Fri, Jun 20 - Mon, Jun 30
WestJet Logo
12:30 am - 12:04 pmYYC-STL
10h 34m1 stop
WestJet Logo
3:57 pm - 8:57 pmSTL-YYC
6h 00m1 stop
$417WestJet
Find Deal
Mon, Jun 2 - Wed, Jun 11
 Logo
7:00 am - 5:04 pmYYC-STL
33h 04m3 stops
 Logo
9:50 am - 12:44 amSTL-YYC
15h 54m3 stops
Sat, Jun 14 - Sat, Jun 21
 Logo
11:05 am - 5:04 pmYYC-STL
28h 59m2 stops
 Logo
9:50 am - 12:44 amSTL-YYC
15h 54m3 stops
Sat, Jun 14 - Sat, Jun 21
Useful Info

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 $519 respectively.

Good to know

Low seasonDecember
High seasonJune
Cheapest flight$194
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly with an average 5% 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 $194 for a one-way ticket and $358 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?

    SkyTeam, Star Alliance, and oneworld 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.

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
6.5Food
7.5Boarding
8.0Crew
7.2Comfort
6.9Entertainment
Airline reviews

Paid $35 and not able to access the internet at all.

2.0 MediocreAnonymous, Apr 2025HND - JFK
Read more American Airlines reviews

Paid $35 and not able to access the internet at all.

Several delays. Next flight was worse. Did not arrive home until 2am PT

Very helpful ground crew after an earlier flight delay and being rebooked on a different flight.

Everything about the flight was lovely…We left early, arrived early, cabin crew were efficient and helpful. Flight was easy and most pleasant.

First world problems, but still… We were seated in first class and asked for a cocktail on a very short, 50 minute flight. After our drink order was taken, a half hour went by, and we noticed that every other person in the small plane had been served except for us. We got up to ask about it, the drinks finally came, then were taken away three minutes later since the flight was so short. Really strange situation, on the other hand, we were in Utah.

We missed our flight. The boarding pass had the wrong gate and by the time we received the text from Kayak, our flight was already gone. I’ll never use Kayak again and will go direct to the airlines in the future.

Boarding took forever, the plane was cramped and cold, and the seatbelt song came on constantly throughout the red eye flight with a loud pre-recorded message playing each time

Cabin felt crammed Snacks are lame But crew was super efficient getting us out on time despite delay

Flight was delayed bc of mechanical issue. New plane had different configuration so some seats had to be switched. They called all passengers who needed new boarding cards. They did not call us so we thought our seats were the same and fine. When we boarded they informed us our receipts had changed and we are now all sitting separate and in the back row. Both my daughters had meltdowns and started to cry and once we got on the flight, we figured out how we could sit closer to each other, but this was very upsetting.

Took off on time and successfully avoided weather that looked to be a problem along the way

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

Information on your arrival and departure airports

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