$158 Find Cheap Flights from Canada 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 to St. Louis departing on 9/6. 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 for flights 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 for flights to St. Louis, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Canada to St. Louis

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

Thu, Oct 1 - Mon, Oct 5
United Airlines Logo
12:10 pm - 10:30 pm
YVR
-
STL
8h 20m
1 stop
United Airlines Logo
9:04 am - 10:26 pm
STL
-
YVR
15h 22m
1 stop
$282United Airlines
Mon, Nov 2 - Wed, Nov 4
United Airlines Logo
9:30 am - 7:34 pm
YVR
-
STL
9h 04m
1 stop
United Airlines Logo
4:40 pm - 1:30 pm
STL
-
YVR
21h 50m
2 stops
$288United Airlines
Wed, Sep 9 - Tue, Sep 22
American Airlines Logo
3:13 pm - 12:27 am
YYZ
-
STL
10h 14m
1 stop
American Airlines Logo
5:00 am - 2:32 pm
STL
-
YYZ
8h 32m
1 stop
$318American Airlines
Sat, Jul 25 - Wed, Jul 29
American Airlines Logo
1:17 pm - 12:15 am
YYZ
-
STL
11h 58m
1 stop
American Airlines Logo
6:55 am - 5:34 pm
STL
-
YYZ
9h 39m
1 stop
$329American Airlines
Mon, Nov 2 - Wed, Nov 4
Delta Logo
1:15 pm - 11:36 pm
YVR
-
STL
9h 21m
1 stop
Delta Logo
2:15 pm - 12:37 am
STL
-
YVR
11h 22m
1 stop
$337Delta
Fri, Sep 18 - Mon, Sep 21
Delta Logo
7:45 am - 5:37 pm
YYC
-
STL
8h 52m
1 stop
Delta Logo
2:25 pm - 11:06 pm
STL
-
YYC
9h 41m
1 stop
$350Delta
Tue, Aug 25 - Wed, Aug 26
Air Canada Logo
12:35 pm - 6:42 pm
YHZ
-
STL
8h 07m
1 stop
Air Canada Logo
8:55 am - 8:30 pm
STL
-
YHZ
9h 35m
2 stops
$353Air Canada
Mon, Sep 21 - Wed, Sep 30
Air Canada Logo
2:05 pm - 8:20 pm
YHZ
-
STL
8h 15m
1 stop
Air Canada Logo
8:55 am - 5:14 pm
STL
-
YHZ
6h 19m
1 stop
$354Air Canada
Tue, Oct 6 - Wed, Oct 7
Alaska Airlines Logo
6:09 am - 3:44 pm
YYJ
-
STL
7h 35m
1 stop
Alaska Airlines Logo
4:40 pm - 10:23 pm
STL
-
YYJ
7h 43m
1 stop
$619Alaska Airlines
Tue, Oct 6 - Wed, Oct 7
Alaska Airlines Logo
6:09 am - 3:44 pm
YYJ
-
STL
7h 35m
1 stop
Alaska Airlines Logo
4:40 pm - 10:23 pm
STL
-
YYJ
7h 43m
1 stop
$620Alaska Airlines
Booking Insights

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

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

What is the cheapest flight to St. Louis?

These are the best round-trip prices found by users searching on KAYAK in the last 5 days.

In the last 5 days, the cheapest flight deal to St. Louis was found on the route from Vancouver, at $282 return. The most popular connection is from Toronto to St. Louis and KAYAK users have found round-trip deals for as low as $318 in the last 5 days.

What is the cheapest day to fly to St. Louis?

The average price of all round-trip flights to St. Louis clicked on KAYAK for each day over the last 12 months.

Based on KAYAK data, the cheapest day to fly to St. Louis is Sunday where round-trip tickets can be as cheap as $394. On the other hand, the most expensive day to fly is Monday, where round-trip prices are $548 on average.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights 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 to St. Louis is August, where tickets cost $154 on average for return flights. On the other hand, the most expensive months are September and February, where the average cost of tickets from Canada is $329 and $319 respectively. For one-way flights, the best month to travel is October with an average price of $62.

What is the cheapest time of day to fly to St. Louis?

The average price for all round-trip flights to St. Louis depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to St. Louis is generally in the evening, when round-trip flights cost $405 on average. The most expensive time of day to fly to St. Louis is generally at night, which is peak travel time and where the average cost of a ticket is $584.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to St. Louis, 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, you should book around 4 weeks before departure, which saves you about 53% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$158
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly with an average 5% increase in price.
Flight from Vancouver to St. Louis

FAQs - booking St. Louis flights

  • What is the cheapest flight to St. Louis?

    In the last 5 days, the cheapest flight deal to St. Louis was found on the route from Vancouver, at $282 return. The most popular connection is from Toronto to St. Louis and KAYAK users have found round-trip deals for as low as $318 in the last 5 days.

  • How far is Lambert-St Louis Airport from central St. Louis?

    Central St. Louis is 13 miles away from Lambert-St Louis Airport.

  • What is the name of St. Louis’s airport?

    When flying to St. Louis, you'll arrive at Lambert-St Louis Airport (STL). The airport is also known as Lambert Field, Lambert-St Louis, St. Louis Lambert, or St. Louis Lambert Intl.

  • How much is a flight to St. Louis?

    On average, a flight to St. Louis costs $409. The cheapest price found on KAYAK in the last 2 weeks cost $252 and departed from Toronto Pearson Intl Airport.

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to 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 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 with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight 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 up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $326 or less one-way and $450 or less round-trip.
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest St. Louis flight deals.

Reviews of the top 3 airlines serving from Canada to St. Louis

 
See real verified KAYAK customer reviews for airlines flying to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Canada to St. Louis. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with 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.
7.9
Alaska AirlinesOverall score based on 12564 reviews
8.5Crew
7.0Food
8.1Boarding
7.8Comfort
7.0Entertainment
Airline reviews

The flight was on time, seats were comfortable, crew is friendly and professional. Nice flight overall. Thanks!

10.0 ExcellentElena, Jun 2026
DFW - SAN
Read more Alaska Airlines reviews

The flight was on time, seats were comfortable, crew is friendly and professional. Nice flight overall. Thanks!

Both flights were on time and without in-flight issues. Although we had to check our carry-on bags at the last minute (cabins were full, no more room), our bags were on the baggage carousel very quickly. (Happened both ways.) Staff was friendly. Boxed water tasted weird (a little like cardboard?) but not a huge deal. Overall good experience.

5 hr flight with no meal service is just unacceptable. We got pretzels and a drink..

Although delayed an hour, the gate attendants kept us notified and the rest of the trip went off with no issues.

We showed up to our gate less than 15 minutes after boarding started and they wouldn’t let us in. It was still 15 minutes even before take off so we’re weren’t even late to the flight.

Flew first class. No headrest screens on either flight and the one flight had no foot rests either.

Alaska airlines has gone from excellent to budget. Food only for purchase. Entertainment only on your devise, no headphones

Someone rebooked my Alaska flight to a much later Delta flight. Now I am sitting at the Seattle airport after a long international flight and have to wait another 4 hours even though I would have been able to catch my initial flight

Great with American Poor with Alaska airlines. 3 hrs isn’t enough to transfer bags from one gate to another 5-6 gates away in the same terminal. Bags essential for cruise were unavailable Flights delayed cascading the problem. (Alaska Airlines responsibility). Very poor execution of operations that should be the simplest aspect of travel.

They lost my bag and 24 hours later have yet to find it

Maybe focus more on delivering a good product vs selling me a damn credit card

American Airlines is a great dependable airline, on time arrival and departure with polite crew and staff.

I think since I am an AA Advantage member, my checked bags should have been free, but I paid for all 4 of us.

This flight moved Gates several times in a short time period, from B to C, which required a substantial walk or rail ride. Then the flight was delayed more than 2 hours and the food was subpar compared to other flights.

Flight was delayed multiple times without giving any particular reason and the only thing that was communicated was that 'Aircraft is getting ready'. I was stuck at SFO airport for 15 hours and finally took Southwest Airlines flight back home to Dallas.

Rudest flight attendants ever, waited over 20 for light to be answered and it never was then tried to flag down an attendant who said someone else would come, just needed water to take some medicine Food bad

I had the best flight crew I have ever experienced in all my years flying with AA. I would specially like to thank Till Tatum/96038 for her kindness professionalism and outstanding service! My son turned 8 years old one day before our flight and she went out of her way to make him feel so special. We will never forget this flight! The whole crew made a special card for Frankie’s bday and it really touched our hearts. He will never forget it and neither will we! Thank you with all our hearts! We hope to be on more flights with Till Tatum and this amazing crew.

Hydraulic leak caused the flight to be cancelled. Auto system scheduled us on a 3 am flight. Wevhsedvrebook on the app and hit schedules later in the afternoon. Our luggage per gate and ticket agent would be rescanned and put in our new flight. Did not happen. Our luggage stayed in hsv. Baggage claim in wash dc unable to help. We filed a claim. Several emails about our luggage were in conflict with one another. Called as baggage and was on hold 30 minutes. Oscar said one of 2 was out fir delivery then cancelled. About 45 minutes later both pieces were delivered. Their system is suspect

My entertainment unit kept locking up and had to be restarted multiple times. Also those commercials for Budapest and Ralph Laureen. Come on those were stuff only those who can afford the outrageous fees of first and business class would be interested in.. And the fact you have no military discount is not good either,

I was not clear if food was offered or not.

Delayed 2 and a half hours Middle seat next to a majorly overweight guy who took up most of my seat

Smooth ride but I wish they have better food selections.

Aircraft is designed with all 3 washrooms at the back of the plane, meaning that when there is service underway, there are no washrooms available and it gets very crowded at the back of the plane.

Multiple delays and gate changes resulting in arrival with a 5 hour delay.

One crew member, Brandy was very helpful with recovering phone lost in customs. The plane was ancient and poorly maintained. Checked baggage did not arrive with flight. Almost missed flight because if insanely short layover time. Air Canada is worst flight I have ever booked with Kayak. Wanted to charge for headsets for on flight media.

The flight was good. My luggage didn’t land with me when I arrived in Columbus. So grateful I was able to get my luggage back within the 2 hours😍👍.

gave me complimentary food as the flight was not full and was attentive to my needs

It was a nice and smooth trip. Gave a friendly environment throughout the journey.

Meal and drink service was good. Old plane with old business class seats were quite disappointing

The flight was smooth, the plane was spacious and clean, the staff was kind and the food was decent.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Wentzville
Farmington
Eureka
Litchfield
Grafton
Shrewsbury
Glencoe

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

Information on the airport you'll fly into in St. Louis