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Find cheap flights from Calgary to St. Louis from $140

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 5/27. 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
0 bags
sam. 6/8
sam. 6/15

Search 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
In the last 7 days travelers have searched 43,968,530 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

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.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
3:35 pm - 10:46 amYYC-STL
18h 11m1 stop
11:36 am - 5:04 pmSTL-YYC
30h 28m3 stops
mar., mai 21 - mer., mai 29
3:35 pm - 10:46 amYYC-STL
18h 11m1 stop
11:36 am - 11:00 amSTL-YYC
24h 24m2 stops
mar., mai 21 - mer., mai 29
12:05 pm - 10:46 amYYC-STL
21h 41m2 stops
11:36 am - 5:04 pmSTL-YYC
30h 28m3 stops
mar., mai 21 - mer., mai 29
7:00 am - 10:46 amYYC-STL
26h 46m3 stops
11:36 am - 5:04 pmSTL-YYC
30h 28m3 stops
mar., mai 21 - mer., mai 29
12:30 am - 10:43 amYYC-STL
9h 13m1 stop
2:20 pm - 11:21 pmSTL-YYC
10h 01m1 stop
$405Delta
Find Deal
lun., sept. 9 - mer., sept. 11
12:30 am - 10:43 amYYC-STL
9h 13m1 stop
11:51 am - 7:59 pmSTL-YYC
9h 08m1 stop
$407Delta
Find Deal
lun., sept. 9 - mer., sept. 11
12:30 am - 11:48 amYYC-STL
10h 18m1 stop
7:00 am - 7:15 pmSTL-YYC
13h 15m2 stops
$443WestJet
Find Deal
lun., mai 20 - mer., mai 29
6:00 am - 3:20 pmYYC-STL
8h 20m1 stop
9:05 am - 9:43 pmSTL-YYC
13h 38m1 stop
$445Air Canada
Find Deal
mar., sept. 10 - mer., sept. 11
12:20 am - 11:48 amYYC-STL
10h 28m2 stops
6:00 am - 7:15 pmSTL-YYC
14h 15m2 stops
$448WestJet
Find Deal
lun., mai 20 - mer., mai 29
6:00 am - 3:20 pmYYC-STL
8h 20m1 stop
4:05 pm - 10:44 pmSTL-YYC
7h 39m1 stop
$452Air Canada
Find Deal
mar., sept. 10 - mer., sept. 11

Flights from Calgary to St. Louis - Travel Insights & Trends

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 flights from Calgary to St. Louis clicked on KAYAK for each day over the last 12 months.
For Calgary to St. Louis, Saturday is the cheapest day to fly on average and Sunday is the most expensive. Flying from St. Louis back to Calgary, the best deals are generally found on Monday, with Sunday being 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 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 March, where tickets cost $329 on average. On the other hand, the most expensive months are July and January, where the average cost of tickets is $653 and $592 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Calgary to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Calgary to St. Louis, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 44 days before departure.

Which airlines provide the cheapest flights from Calgary to St. Louis?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the best return deals on flights connecting Calgary to St. Louis were found on Delta ($405) and WestJet ($443). WestJet proposed the cheapest one-way flight at $209.

Good to know

Low season

September

High season

November

Cheapest flight

$140
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly and prices are also 16% lower on average.
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 $140 for a one-way ticket and $344 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, and Star Alliance are the airline alliances operating flights between Calgary and St. Louis, with SkyTeam 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.

See more FAQs

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 11030 reviews
7.1Entertainment
7.7Boarding
8.1Crew
7.2Comfort
6.7Food
Airline reviews

It was good! Appreciated that it was very on schedule so it made the connecting flight less stressful

8.0 ExcellentAnonymous, Apr 2024YUL - ORD
Read more about United Airlines reviews

It was good! Appreciated that it was very on schedule so it made the connecting flight less stressful

Two flights,both poor. No entertainment. Cramped and uncomfortable seats, little space, the rest was OK. Staff were acceptable good.

Last minute gate change nearly caused us to miss our flight. Change was not announced or displayed in the main board at the old gate. Terrible communication. When we landed we had to wait 20 minutes because there was another plane at the assigned gate. Not the crew’s fault, but adding 20 minutes to a 45 minute flight sucked.

The crew was doing their best on an old plane needing updating. Chairs that creaked and wouldn’t stay in position. My tray table was unusable as was on-board entertainment due the audio needing usb earphones (that were not provided). Prior to boarding in Toronto and despite being scheduled for a wheelchair and assistance, we were dropped off by clubcar without a wheelchair which I found myself by a gate. Due to no boarding gate assigned at that time we waited and when it was, it subsequently was moved from 64 to 95. No help could be found so I pushed my husband’s chair to that furthest gate in the airport at the highest speed possible for a 73 year old. And by that I mean I ran. It was a very stressful experience.

Wifi wasn't working on one of the UA flights after boarding.

Leg room was lacking. Legs crammed into seat in front.

T hey did a great job. Flight was on time .

the plane was old. the wifi didn’t work. the entertainment was boring and dated. the charging ports were impossible to find. i was mostly ignored by flight attendants that had no problem speaking to the man beside me. i got two drinks the entire time i was on the plane.

Crew was not very helpful. They forgot to serve me coffee and had to wait for a long time.It looked as if they were not very happy with what they were doing.

The flight I was connecting with waited for me even though my 1st flight was late. I really appreciated that.

It was overall above average experience. If there is only one thing i could complain about was the lack of wifi availability on my flight from Vancouver to San Francisco

Not much food available, not able to choose seats to be near each other, tv did not work

I think Air Canada is the only airline I've flown where they don't give you at least a free cookie.

All but one of four were on time. One was delayed for an hour

Got the email to check in but when I tried to check in it said "cannot connect to server", so checked in at the desk.

It took 5 hour to get a crew to D Ice the plan. We had to sit on the runway for 5 hrs. in Calgary. It snows most of the winter. No proactive plan. In addition, after 3 calls to customer service they couldn't figure out how to have my wife and myself sit together on her birthday weekend. Everybody kept passing the buck. No decision from customer service, luggage drop off or check in team. The experience was a complete mess! I don't think we'll ever fly on this airline again.

my flight from Toronto to Chicago was horrible. we tried to land 3 times, couldn't. they went to Milwaukee & sat on the plane/runway for another 1.5 hours. then they flew us back to Toronto. we had to stay overnight. the communication was bad. just told us to wait for an email update. no credit, no voucher for my additional night in a hotel. nothing. I will not fly air Canada again.

The wifi I paid for did not work. The seats are tight.

The seats werr comfortable Would like a better snack that a tiny bag of pretzels

There were no free snacks…little pretzel bag or cookies like we had on our flight out.

Book cheap flights from Calgary to St. Louis

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Calgary to St. Louis found on KAYAK in the last 72 hours.
5/27lun.
1 stop
26h 13mYYC-STL
$140
9/30lun.
1 stop
13h 48mYYC-STL
$184
5/27lun.
2 stops
18h 13mYYC-STL
$190
6/7ven.
2 stops
15h 58mYYC-STL
$203
5/26dim.
2 stopsWestJet
10h 28mYYC-STL
$209
5/26dim.
1 stopWestJet
10h 18mYYC-STL
$210
8/1jeu.
2 stopsDelta
11h 34mYYC-STL
$215
6/8sam.
2 stops
26h 26mYYC-STL
$220
6/8sam.
3 stops
24h 11mYYC-STL
$230
6/7ven.
1 stopWestJet
14h 50mYYC-STL
$249

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Last minute flights from Calgary to St. Louis

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Calgary to St. Louis that are departing in the next 10 days.
5/10ven.
multi-stopWestJet
7h 51mYYC-STL
5/12dim.
multi-stopWestJet
15h 35mSTL-YYC
$533
5/10ven.
multi-stopDelta
5h 20mYYC-STL
5/12dim.
multi-stopDelta
8h 18mSTL-YYC
$537
5/10ven.
multi-stopDelta
6h 07mYYC-STL
5/12dim.
multi-stopDelta
6h 34mSTL-YYC
$539
5/10ven.
multi-stopWestJet
21h 41mYYC-STL
5/12dim.
multi-stopWestJet
11h 19mSTL-YYC
$583
5/10ven.
multi-stopWestJet
8h 46mYYC-STL
5/12dim.
multi-stopWestJet
15h 35mSTL-YYC
$585
5/10ven.
multi-stopWestJet
8h 46mYYC-STL
5/12dim.
multi-stopWestJet
11h 19mSTL-YYC
$594

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Calgary - St. Louis Flights

Departure:

Calgary (undefined)Canada

Destination:

St. Louis (STL)United States

Return flight deals:

St. Louis - Calgary

Cabin classes: