YYC - STL

C$ 227 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 29/9. 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
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 27% or moreCompare multiple travel sites with one search.

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

Free to useThere are no hidden charges or fees.

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

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.
Choose your dates
Delta Logo
6:30 a.m. - 8:39 p.m.YYC-STL
13h 09m2 stops
Delta Logo
3:50 p.m. - 11:01 p.m.STL-YYC
8h 11m2 stops
C$ 381Delta
Find Deal
Wed, 7 May - Tue, 13 May
WestJet Logo
12:30 a.m. - 12:04 p.m.YYC-STL
10h 34m1 stop
WestJet Logo
10:45 a.m. - 6:28 p.m.STL-YYC
8h 43m1 stop
C$ 528WestJet
Find Deal
Tue, 6 May - Tue, 13 May
WestJet Logo
12:20 a.m. - 3:08 p.m.YYC-STL
13h 48m2 stops
WestJet Logo
11:32 a.m. - 7:40 p.m.STL-YYC
9h 08m2 stops
C$ 555WestJet
Find Deal
Tue, 6 May - Tue, 13 May
WestJet Logo
6:35 a.m. - 2:16 p.m.YYC-STL
6h 41m1 stop
WestJet Logo
9:00 a.m. - 8:00 p.m.STL-YYC
12h 00m1 stop
C$ 602WestJet
Find Deal
Sun, 27 Jul - Mon, 4 Aug
WestJet Logo
12:30 a.m. - 12:24 p.m.YYC-STL
10h 54m1 stop
WestJet Logo
9:00 a.m. - 8:00 p.m.STL-YYC
12h 00m1 stop
C$ 649WestJet
Find Deal
Sat, 26 Jul - Mon, 4 Aug
WestJet Logo
12:30 a.m. - 12:24 p.m.YYC-STL
10h 54m1 stop
WestJet Logo
1:30 p.m. - 12:44 a.m.STL-YYC
12h 14m2 stops
C$ 704WestJet
Find Deal
Sat, 26 Jul - Mon, 4 Aug
 Logo
12:20 a.m. - 6:03 p.m.YYC-STL
16h 43m2 stops
 Logo
10:08 a.m. - 11:50 p.m.STL-YYC
14h 42m2 stops
C$ 818
Find Deal
Sat, 26 Jul - Mon, 4 Aug

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 Sundays and avoid leaving on a Friday, as it's usually the priciest day. When flying back from St. Louis, Thursday is the cheapest day to fly and Monday 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 C$ 410 (return) on average. On the other hand, the most expensive months are November and May, where the average cost of round-trip tickets is C$ 773 and C$ 719 respectively.

Good to know

Low season

December

High season

June

Cheapest flight

C$ 227
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly (5% more expensive 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 C$ 164 for a one-way ticket and C$ 275 for a round-trip.

  • Which airports will I be using when flying from Calgary to St. Louis?

    Calgary airport is called Calgary and the only airport in St. Louis is 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 Star Alliance being the most commonly used for this route.

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

    The two airlines most popular with KAYAK users for flights from Calgary to St. Louis are Delta and United Airlines. With an average price for the route of C$ 437 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of C$ 739 and an overall rating of 7.4.

  • 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.

  • 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 4 airlines serving 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.
8.0
DeltaOverall score based on 7920 reviews
7.9Comfort
8.2Boarding
7.3Food
8.5Crew
7.9Entertainment
Airline reviews

Delta flight was on time, seats were comfortable, and crew was nice.

8.0 ExcellentAnonymous, Apr 2025LAX - DEN
Read more Delta reviews

Delta flight was on time, seats were comfortable, and crew was nice.

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

Delta is a cut above the others in customer service.

The worst part was I was NOT allowed in the lounge even though I was holding a first class ticket and have a premium American Express card. I have flown Business or First Class with many airlines. Delta is the ONLY one who does not extend this courtesy to anyone except people who hold the very expensive American Express card. As a result, I won’t fly Delta if I have any other choice.

A little bumpy ride . No food was being provided due the the turbulence. That was ok it was a short flight to my standards.

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

I love the free WiFi!! Crew was nice. Bathroom was decent. First time flying delta in a long time and I enjoyed it. Will definitely look into booking with Delta more but I think Delta is a little more expensive than the other airlines.

third trip overseas with delta recently where the TV did not work- not acceptable for a 8 hour flight! your food really has declined crew great and I am loyal to delta

Boarding in Amsterdam is always chaotic. KLM/ Delta has not streamlined or made it efficient as it was boarding in Detroit . The food was mediocre The crew was unfriendly and more focused on getting things done quickly rather than service with a smile .

Plane temperature was comfortable (not to hot) when boarding and waiting for takeoff.

Michael, our FA was very attentive, even finding me a chocolate brownie from economy class when the dessert selections were all dairy based. ( intolerant, not allergic so don’t usually need to order dairy free)

We tried to upgrade to economy premium but were told this was not possible as we had booked through United Airlines (and Air Canada was operating the flight). This seemed silly given there was ample space in economy premium. Additionally, we had to wait almost 1.5 hours upon arrival to taxi to the gate. Otherwise, the crew were very pleasant and passengers were friendly.

It was my first time with United Airlines and I would say it was very good experience and best of all the flights were on time. Will definitely fly with United Airlines next time.

headphone jack didnt work for the first flight and not much variety

Plane 3 hours late. Missed connection. No help from gate staff. App horrible. Lost connection repeatedly. No service desk. Finally got help from young girl driving cart.

Not as good as expected Air Can needs to improve totally rated on internet as worst

The flight was delayed, it took longer than anticipated because of weather, and they broke my luggage.

Short flight - no food understandable. Flight was delayed for over an hour. Overall, it was good.

Everything was good. Flight was on time, luggage pickup was quick. The staff were great. Could not ask for anything more.

crew was great, wifi was very poor could not even load a youtube video

It took 30 minutes to check in with the Westjet rep. They didn’t have enough seats and she needed to make a call… I am always “randomly” selected to be checked at security. Their “randomly “ selection system may need some updating. They treat people like criminals. It is not appropriate behavior.

First flight out in the morning is often the best chance of running on time. Not in this case, which unfortunately is now what passengers can expect as what is common. - If you are late for a flight, too bad for you. - If West Jet is late, too bad for you. - Bags don't make it? Too bad for you. - Flight change by 1+ days, too bad for you Prices continue to increase, while customer service nosedives. This is backwards and in any other develop country would be considered unacceptable - except for Canada. Too bad for us.

Experience was good. Was surprised they didn’t offer a complimentary meal on a 5 hour flight.

Too squished in seats. I'm 110 lbs and 5'6....can't imagine being any bigger and flying

The flight attendants were great, but not much room while sitting and it would be nice to get free movies.

Original flight canceled and communicated poorly. A series of gate changes , delays and plane changes followed. Even after the entire flight boarded there was another plane changes followed. Food vouchers provided to my travel companion but not to me despite being on the same reservation. No in flight entertainment. The entire experience was terrible although the flight crew were great.

It was great being a direct flight from Calgary to Tokyo. No transfer to worry about.

Very old planes. Seats were not comfortable. Air was not on during the flight leading to incredibly stuffy conditions.

Traveling on two legs the food was identical and not very good

The flight was delayed to 1:50 am from 12:05am which caused confusion for us on the connecting flight.

Not much....we did not get the complimentary beverages promised in our ticket. My partner and I did not have the window seats promised. We didnt get to sit together.....

It was great. Although when I got my luggage it was broken.

In both directions, one of the two flights was delayed in departing. due to mechanical issues (not weather). That tells me that inspection and maintenance is not being done often enough to prevent such from occurring. In the outbound direction, the second leg was delayed and we had to change our plans for after landing, thus missing an expected event. In the return direction, the first leg that was delayed; we had a long enough layover that we were not hurried to make our connection, but others were not so lucky. Comment about this survey process: in the multiple choice answers, there is no option for "Not Applicable"; as we had no food on board, we can't properly answer that question.

I liked not paying for carry on and the compensation my husband and I received from the airline for overbooking our flight. The staff was very friendly and helpful.

It was a short flight and for that reason the flight was acceptable.

Overall, a good experience. The crew were not as friendly/helpful on my flight from Toronto to Nashville, but they were nice enough. I asked for a coffee about 45 min before landing, the flight attendant acted put out at the request.. apparently, they forgot about it and when I asked again they said it was too late. It was the only thing I asked for on the flight. Needless to say, it bugged me.

The seats really could do with some extra padding. The staff member who checked me in at Calgary was amazing. Friendly and lovely.

Seats small for international flights, food not good, bathrooms bad, small isles to carry along. For small local flights it’s okay. Emirates had big seats for flight between Dubai to Karachi

Flight was cancelled due to problems with the aircraft . Not much else to add . Itinerary was changed from yeg to Yule direct . Fine .

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.