YYC - STL

$159 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 4/27. 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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$311
Typical prices: $435-$530
Multiple Airlines
Mon 4/13Sat 4/18
YYC - STL • 1 stop
Cheapest one-way
$159
Multiple Airlines
Mon 4/27
YYC - STL • 2 stops
Top airlines
Cheapest • from $387 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop 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
When to travel
Cheapest • 21% 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 100s 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

Mon, Apr 13 - Sat, Apr 18
Multiple Airlines Logo
12:30 am - 6:50 am
YYC
-
STL
29h 20m
1 stop
Multiple Airlines Logo
8:23 pm - 7:09 pm
STL
-
YYC
23h 46m
1 stop
$311Multiple Airlines
Sat, Apr 25 - Sun, May 3
Multiple Airlines Logo
12:30 am - 6:50 am
YYC
-
STL
29h 20m
1 stop
Multiple Airlines Logo
4:59 pm - 11:00 am
STL
-
YYC
19h 01m
2 stops
$375Multiple Airlines
Mon, Apr 13 - Sat, Apr 18
Multiple Airlines Logo
12:30 am - 11:19 pm
YYC
-
STL
21h 49m
2 stops
Multiple Airlines Logo
8:23 pm - 7:09 pm
STL
-
YYC
23h 46m
1 stop
$380Multiple Airlines
Sat, May 2 - Mon, May 11
American Airlines Logo
1:40 pm - 11:46 pm
YYC
-
STL
9h 06m
1 stop
American Airlines Logo
8:03 pm - 12:59 pm
STL
-
YYC
17h 56m
1 stop
$387American Airlines
Wed, Apr 29 - Wed, May 6
American Airlines Logo
1:40 pm - 8:24 am
YYC
-
STL
17h 44m
1 stop
American Airlines Logo
5:21 pm - 12:59 pm
STL
-
YYC
20h 38m
1 stop
$399American Airlines
Sun, Apr 26 - Sun, May 3
Multiple Airlines Logo
7:00 am - 6:50 am
YYC
-
STL
22h 50m
1 stop
Multiple Airlines Logo
11:28 am - 11:00 am
STL
-
YYC
24h 32m
1 stop
$401Multiple Airlines
Sat, May 16 - Sat, May 23
American Airlines Logo
1:40 pm - 11:56 pm
YYC
-
STL
9h 16m
1 stop
American Airlines Logo
9:08 am - 11:38 pm
STL
-
YYC
15h 30m
1 stop
$406American Airlines
Wed, Apr 29 - Wed, May 6
American Airlines Logo
6:45 am - 11:46 pm
YYC
-
STL
16h 01m
2 stops
American Airlines Logo
8:03 pm - 12:59 pm
STL
-
YYC
17h 56m
1 stop
$409American Airlines
Tue, Apr 14 - Fri, Apr 17
Delta Logo
6:40 am - 11:36 pm
YYC
-
STL
15h 56m
2 stops
Delta Logo
2:20 pm - 11:00 pm
STL
-
YYC
9h 40m
1 stop
$430Delta
Sat, May 2 - Mon, May 11
Multiple Airlines Logo
8:00 pm - 6:50 am
YYC
-
STL
33h 50m
2 stops
Multiple Airlines Logo
5:27 pm - 11:00 am
STL
-
YYC
18h 33m
1 stop
$433Multiple Airlines
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 April.

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 October, where tickets cost $385 (return) on average. On the other hand, the most expensive months are November and January, where the average cost of round-trip tickets is $567 and $566 respectively.

Good to know

Low seasonOctober
Cheapest flight$159
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly with an average 3% 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 $159 for a one-way ticket and $311 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 is the only airline alliance operating flights between Calgary and St. Louis.

  • 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.
7.4
United AirlinesOverall score based on 9427 reviews
7.3Comfort
7.1Entertainment
7.7Boarding
6.6Food
8.1Crew
Airline reviews

Given I (and I’m assuming most people) have both carry in and a personal item included in their fare, I find it very unfair that on neither of my flights I was able to use the overhead for my small backpack because they were completely rammed with luggage, people personal items, jackets, hats and other items. So the only item I brought in had to be stuffed under my seat while they had their leg room and sat comfortable with all of their items in the overhead. This has to stop because I was uncomfortable on both flights when I only had one smaller item that could not be checked due to its contents (medication etc). Plenty of people could have checked theirs but chose not to and then took up the space allotment for 2 people.

8.0 ExcellentAnonymous, Feb 2026
YEG - IAH
Read more United Airlines reviews

Given I (and I’m assuming most people) have both carry in and a personal item included in their fare, I find it very unfair that on neither of my flights I was able to use the overhead for my small backpack because they were completely rammed with luggage, people personal items, jackets, hats and other items. So the only item I brought in had to be stuffed under my seat while they had their leg room and sat comfortable with all of their items in the overhead. This has to stop because I was uncomfortable on both flights when I only had one smaller item that could not be checked due to its contents (medication etc). Plenty of people could have checked theirs but chose not to and then took up the space allotment for 2 people.

Flight attendants had a little attitude. Food tastes no good.

Airport terminal was outdated, flight was on a small jet with no wifi

From pre boarding to flight attendant, crew and baggage handler, excellent. Didn’t lost my luggage like West jet.

Very poor. The flight was delayed from Toronto because some forget to do there job . I got to my connecting gate in San Francisco 10 minutes before the departure.but this didn’t let me board even though the flight was still there for an other 30 minutes. The the gentleman at the unite airline desk told me that they usually wait for passengers but air Canada called and told them not to we I been rerouted to Manila instead of Hong Kong . In San Francisco they mad me check in my carryon bag . I was told the it will directly go yo ho chi minn cuyt but I was told that by the Vietnams airline desk that’s not there I’m 10 hours behind my scheduled flight and looks like I I’m going without baggage. I don’t have a chance of catching ..

It was great. There were some issues prior to takeoff. The weather was poor so we had to go through deicing, and we were delayed a bit by the pilots' concern about one of the engines, but that's aviation. The pilots handled everything with aplomb, and kept us apprised

Reliable, nice crew, I fly often on that flight and I like it all.

l really enjoy very much the flight was very pleasant

Essy to get on. The hostess gave very little pop, the plane was late getting in, and we are still waiting for our bags. This sucks. :/

The Sears in the 800s are not too good perfect Airbus why cant the new 737 fix that

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

Information on your arrival and departure airports