YYC - STL

$136 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 12/13. 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
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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, Dec 22 - Tue, Dec 30
American Airlines Logo
1:31 pm - 1:17 pmYYC-STL
22h 46m1 stop
American Airlines Logo
8:01 pm - 12:51 pmSTL-YYC
17h 50m1 stop
$249American Airlines
Find Deal
Fri, Dec 26 - Tue, Dec 30
American Airlines Logo
1:31 pm - 8:35 amYYC-STL
18h 04m1 stop
American Airlines Logo
8:01 pm - 12:51 pmSTL-YYC
17h 50m1 stop
$388American Airlines
Find Deal
Thu, Dec 18 - Mon, Dec 22
American Airlines Logo
1:31 pm - 11:45 pmYYC-STL
9h 14m1 stop
American Airlines Logo
5:16 pm - 12:48 pmSTL-YYC
20h 32m1 stop
$394American Airlines
Find Deal
Wed, Nov 26 - Mon, Dec 1
Multiple Airlines Logo
7:35 pm - 9:09 pmYYC-STL
24h 34m1 stop
Multiple Airlines Logo
7:03 pm - 11:44 amSTL-YYC
41h 41m2 stops
$418Multiple Airlines
Find Deal
Wed, Nov 26 - Mon, Dec 1
Multiple Airlines Logo
7:35 pm - 9:09 pmYYC-STL
24h 34m1 stop
Multiple Airlines Logo
7:03 pm - 11:44 amSTL-YYC
41h 41m2 stops
$424Multiple Airlines
Find Deal
Fri, Nov 28 - Tue, Dec 2
Delta Logo
3:07 pm - 11:23 pmYYC-STL
7h 16m1 stop
Delta Logo
12:49 pm - 11:13 pmSTL-YYC
11h 24m2 stops
$462Delta
Find Deal
Sun, Dec 14 - Sun, Dec 21
Delta Logo
7:35 am - 7:10 pmYYC-STL
10h 35m1 stop
Delta Logo
6:05 am - 1:40 pmSTL-YYC
8h 35m1 stop
$518Delta
Find Deal
Wed, Nov 26 - Mon, Dec 1
WestJet Logo
8:15 pm - 6:35 pmYYC-STL
21h 20m2 stops
WestJet Logo
6:00 am - 7:15 pmSTL-YYC
14h 15m2 stops
$520WestJet
Find Deal
Tue, Nov 25 - Mon, Dec 1
WestJet Logo
12:15 am - 4:07 pmYYC-STL
14h 52m2 stops
WestJet Logo
6:00 am - 7:15 pmSTL-YYC
14h 15m2 stops
$527WestJet
Find Deal
Wed, Nov 26 - Mon, Dec 1
Air Canada Logo
6:15 pm - 12:28 pmYYC-STL
17h 13m2 stops
Air Canada Logo
11:05 am - 12:14 amSTL-YYC
14h 09m2 stops
$576Air Canada
Find Deal

Everything you should know

Top airlines
American Airlines
Cheapest • from $249 (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
$249
Typical prices: $468-$470
American Airlines
Mon 12/22Tue 12/30
YYC - STL • 1 stop
Cheapest one-way
$136
Typical prices: $169-$412
Multiple Airlines
Sat 12/13
YYC - STL • 2 stops
Start a new search
KAYAK searches 100s 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 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 $564 and $511 respectively.

Good to know

Low seasonOctober
Cheapest flight$136
Best time to beat the crowds with an average 0% drop in price.
Most popular time to fly with an average 2% 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 $136 for a one-way ticket and $249 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?

    Star Alliance, and oneworld 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, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from Calgary to St. Louis are United Airlines and American Airlines. With an average price for the route of $509 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $516 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. 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 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 8999 reviews
6.6Food
7.3Comfort
7.1Entertainment
8.1Crew
7.7Boarding
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.

Wish some foods provided rather than just biscuit/cookie for flight more than 2 hours

Wish a flight with more than 2 hours with some snack rather than just cookie/biscuit.

The flight attendant, a black woman with curly hair who sat near Row 21, was wonderful and kind.

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

Nice comfortable flight from Barcelona back to the states. The premium economy offers the extra room we need for my husband. The food was good and our flight attendants were excellent.

Flight was delayed leaving Dallas. Arrived about 2 hours later than scheduled.

Flight delayed and missed connection. Rescheduled flight cancelled after 6 hrs wait. Rerouted thru ORD, flight cancelled, overnight stay in ORD. Still in the air on new flight!

We are too tired and frustrated to comment politely at this point

Terrible. Our luggage was delayed and couldn’t be delivered for several days. We got bad information from the airline agents at baggage claim. We had to pick up our car so we wouldn’t be charged for an extra day. We got lost in the maze of airport parking. The baggage claim agents didn’t offer us any compensation for our extra time and expense. We are tired, hungry and very frustrated.

The flight was flawless and we even arrived between 20 and 25 minutes early!

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

Information on your arrival and departure airports

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