STL - YYC

$141 Find Cheap Flights from St. Louis to Calgary

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Calgary departing on 3/3. 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 Calgary

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Calgary, 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 St. Louis to Calgary, as well as popular online travel agencies
Travelers love KAYAK
41 299 237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$390
Typical prices: $457-$590
Multiple Airlines
Tue 2/24Fri 2/27
STL - YYC • 2 stops
Cheapest one-way
$127
Typical prices: $166-$173
American Airlines
Tue 3/3
STL - YYC • 2 stops
Top airlines
American Airlines
Cheapest • from $446 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 23% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
November
Cheapest • 38% price drop
July
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 Calgary!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to Calgary (STL-YYC)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Calgary 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 St. Louis to Calgary

Tue, Feb 24 - Fri, Feb 27
Multiple Airlines Logo
3:49 pm - 9:02 am
STL
-
YYC
18h 13m
2 stops
Multiple Airlines Logo
7:35 pm - 5:46 pm
YYC
-
STL
21h 11m
1 stop
$390Multiple Airlines
Thu, Feb 26 - Mon, Mar 2
Multiple Airlines Logo
10:11 pm - 11:57 am
STL
-
YYC
14h 46m
1 stop
Multiple Airlines Logo
7:20 pm - 10:27 pm
YYC
-
STL
26h 07m
2 stops
$435Multiple Airlines
Sun, Mar 1 - Thu, Mar 5
American Airlines Logo
9:35 am - 9:56 pm
STL
-
YYC
13h 21m
1 stop
American Airlines Logo
1:40 pm - 11:48 pm
YYC
-
STL
9h 08m
1 stop
$446American Airlines
Sat, May 30 - Mon, Jun 1
Alaska Airlines Logo
7:56 pm - 10:41 am
STL
-
YYC
15h 45m
1 stop
Alaska Airlines Logo
11:31 am - 11:57 pm
YYC
-
STL
11h 26m
1 stop
$507Alaska Airlines
Tue, Feb 24 - Fri, Feb 27
Multiple Airlines Logo
7:00 am - 5:50 pm
STL
-
YYC
11h 50m
1 stop
Multiple Airlines Logo
7:35 pm - 5:46 pm
YYC
-
STL
21h 11m
1 stop
$510Multiple Airlines
Mon, Jun 1 - Sat, Jun 6
Multiple Airlines Logo
7:56 pm - 10:41 am
STL
-
YYC
15h 45m
1 stop
Multiple Airlines Logo
10:15 am - 4:45 pm
YYC
-
STL
5h 30m
1 stop
$519Multiple Airlines
Mon, Mar 2 - Wed, Mar 4
United Airlines Logo
4:30 pm - 9:53 pm
STL
-
YYC
6h 23m
1 stop
United Airlines Logo
12:33 pm - 9:05 pm
YYC
-
STL
7h 32m
1 stop
$520United Airlines
Mon, Mar 2 - Wed, Mar 4
United Airlines Logo
6:55 pm - 11:31 am
STL
-
YYC
17h 36m
1 stop
United Airlines Logo
12:33 pm - 9:05 pm
YYC
-
STL
7h 32m
1 stop
$521United Airlines
Mon, Mar 2 - Wed, Mar 4
United Airlines Logo
6:55 pm - 11:31 am
STL
-
YYC
17h 36m
1 stop
United Airlines Logo
6:15 am - 8:26 pm
YYC
-
STL
13h 11m
1 stop
$522United Airlines
Mon, Jun 1 - Sat, Jun 6
Multiple Airlines Logo
6:20 pm - 10:41 am
STL
-
YYC
17h 21m
2 stops
Multiple Airlines Logo
10:15 am - 4:45 pm
YYC
-
STL
5h 30m
1 stop
$525Multiple Airlines
Booking Insights

KAYAK's insights & trends for St. Louis to Calgary flights

Get data-powered insights and trends into flights from St. Louis to Calgary to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from St. Louis to Calgary?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Calgary departing in February.

What is the cheapest month to fly from St. Louis to Calgary?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Calgary, 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 St. Louis to Calgary is November, where tickets cost $331 (return) on average. On the other hand, the most expensive months are September and December, where the average cost of round-trip tickets is $643 and $640 respectively.

How far in advance should I book a flight from St. Louis to Calgary?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Calgary, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from St. Louis to Calgary, you should book around 2 weeks before departure, which saves you about 23% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know

Low seasonNovember
Cheapest flight$127
Best time to beat the crowds with an average 39% drop in price.
Most popular time to fly with an average 15% increase in price.
Flight from St. Louis to Calgary

When to book flights from St. Louis to Calgary

Are your dates flexible? Find out the best times to travel from St. Louis to Calgary 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 St. Louis to Calgary

  • What is the cheapest flight from St. Louis to Calgary?

    In the last 3 days, the lowest price for a flight from St. Louis to Calgary was $127 for a one-way ticket and $390 for a round-trip.

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

    Yes

  • Which aircraft models fly most regularly from St. Louis to Calgary?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Calgary?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between St. Louis and Calgary, with SkyTeam being the most commonly used for this route.

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

    The two airlines most popular with KAYAK users for flights from St. Louis to Calgary are Delta and United Airlines. With an average price for the route of $632 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $658 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from St. Louis to Calgary?

    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 St. Louis to Calgary.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Calgary?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Calgary from St. Louis 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 St. Louis to Calgary?

    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 Calgary with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and YYC 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 St. Louis to Calgary?

    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 Calgary from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from St. Louis to Calgary

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Calgary. 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 St. Louis to Calgary? 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.
7.9
DeltaOverall score based on 8126 reviews
7.9Comfort
8.5Crew
7.2Food
8.1Boarding
7.8Entertainment
Airline reviews

Timing, quality of service, promptness and courtesy of the staff

10.0 ExcellentAjai, Jan 2026
DFW - ATL
Read more Delta reviews

Timing, quality of service, promptness and courtesy of the staff

It was last minute due to weather - considering - it was amazing! Good smiles, friendly staff and they were making sure we knew what was going on when and where.

delta last minute gave me a boarding pass for a different flight with no confirmation that they were changing it

The flight was comfortable and uneventful, which is what I desire

The service from the flight attendants were of supreme quality. They greeted and treated everyone with a wide smile. This is totally absent nowadays. Kudos to them!!!!

Excellent flight and got us around tough weather. Only issue was seat TV did not work and crew tried to reboot.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

was sitting in the jet bridge for 10 minutes in -20 degree weather waiting for my bag

Outdated equipment in disrepair, wifi inoperable. Broken seats, taped air vents, generally poor condition, the 717 showed its age and lack of upkeep.

My flight out of Baton Rouge to Atlanta was delayed by a half hour. This got us into Atlanta airport 30 minutes late. I ran through the airport to get to my connecting flight. As I approached the boarding gate, I saw the boarding door was still open and a passenger was being checked in. But when I got to the gate, the boarding agent told me they had already given away my seat and there were no empty seats on that flight. So I had to take a later flight. That has never happened to me before. Very frustrating.

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

Flight was delayed. De-icing took a while. When we landed had to wait for another plane to vacate our gate. Just an overall bad experience.

Not United Airlines' fault. It's ORL airport's fault.

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

Very nice flight love the small aircraft. We had a wonderful flight attendant. Nice to see someone that really enjoys her job. Don't have her name but had a southern accent.

Seats in waiting area and on plane hard as rock. Fast internet on the flight was great! Crew was kind.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Not the fault of United—weather, reroute around weather, time sitting on tarmac, arrived couple hours late, too late for train into city necessitating a much pricier cab but weather…can’t be helped.

Flight was good but there are way to many announcements for credit cards etc.

I had no checked baggage but was required to hand over carry on baggage at the door of the plane. There was a lot of overboard space in the plane and I was one of the last ones. I ran to get my carry on but it was gone. I was given back at the plane door in Toronto, so the wait was not as long as it would have been at the carousel.

Crew was helpful and cheerful especially when they had no refreshments to work with. The plane was never serviced and had nothing but limited water and coffee onboard. For the price point, a concern of services.

Flight was smooth, quick and felt safe. The 2 delays not happening would have been better but I guess that happens in the airline industry

Flight was canceled. I asked to be rerouted to OKC and then took an Uber.

AA did not allow to board a flight because my connecting flight from DFW had been canceled. I got on another flight to another city. No service on the plane and I did not use their entertainment system.

On time on a day with lots of weather cancellations on other flights. Thank you for getting me home during a winter storm!

Don't change gate multiple times make people run across the airport. Announce delays in a timely manner. Have maintenance crew ready. Don't delay and keep passengers on the plane for 3 hrs. on tarmac.

The plane was experiencing problems with the HVAC system, it was very cold in the front of the plane and very hot in the back.

My flight to London from Philadelphia was cancelled due to weather.

The attendants were kind and helpful. A sugar-free drink would have been very welcome.

Pilot navigated severe weather/snow storm with skill. Described his intentions clearly

Plane was one hour late. Hardly any space for our carry-ons. Stressful to catch connections.

Plane seating was uncomfortable, very tight fitting for someone my height, did not recline and overall un enjoyable

Overall service is good. Just thought foods need to upgrade for economy class

No communication from Kayak or West Jet. Booked extra flights, flights cancelled, no one answers calls. Will be disputing charges.

Leg room is a problem the plane was dirty and there were no movies available on the app

The gate personnel and flight attendants were all friendly and diligent. The poor attendants from London to Calgary were 2 colleagues short, as one of their team broke her leg on the way to work, and the other stayed with the invited colleague. I felt bad for the crew, but they did a great job regardless.

Flight delayed missed connecting flight crew not very helpful very frustrating customer service

The personal item sizer cannot take a standard backpack, and the cabin luggage sizer cannot take a standard carry-on. Designed for people from the island of Lilliput!!. and also compels people to pay additional fees to check their bags. Making money by ticking off the passengers is a very short-sighted business strategy, especially since they have a choice of carriers

The plug in to charge our phones are all loose my block would not stay in!!

My flight was cancelled due to weather but Westjet got me on a new flight in a timely and efficient manor.

We were happy with the service and cost of checking a bag

Very nice staff members are very nice and friendly helpful

The internet connection was perfect, and the updated entertainment systems that allow me to connect my Bluetooth earbuds was excellent

It was good to receive a card for my birthday

It would have been better if it wasn’t cancelled

Flying in the Dreamliner is always comfortable. Though the food options for Air Canada aren't great.

No TV's. Seats are super uncomfortable. Crew was great!

Service Director cut all cabin lights and window screens defaulted to dark, but it was an afternoon flight going west. I spent hours trying to see what was reading as reading lights weren't working either. What the hell.

The food could have been better. The flight attendant was the friendliest and most helpful I have ever had.

The Entertainment system was nearly useless because videos kept stopping then jumping over segments at random but closely spaced intervals. About 75% of the plane gave up trying to watch and then the gaps and jumps became shorter, It was terrible and made it hard to know what was happening since it was not a normal buffering pause where you still get the cont6en t. Instead the video would pause then jump ahead missing short segments and dialog entirely! The economy class seats on all flights have less and less legroom. I’m tall and the upgraded seats are no better for the leg room, not worth it. I flew from Toronto to Calgary….The staff at YYZ was awesome and kind. My flight’s (prior) incoming plane from Liberia had been delayed over 3 hours and the attendant quickly and kindly transferred me to the earlier flight that got me in hours earlier. Such a great staff!! Every staff member on the plane was very-very Canadian/Kind . Great job and attitude you folks! The plane itself was new and in great condition, except the issue with the video streaming.

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

Information on your arrival and departure airports