$152 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 6/20. 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

Tue, Oct 6 - Sat, Oct 10
United Airlines Logo
7:00 am - 6:38 pm
YVR
-
STL
9h 38m
1 stop
United Airlines Logo
5:10 am - 9:51 am
STL
-
YVR
6h 41m
1 stop
$263United Airlines
Fri, Jun 12 - Sat, Jun 20
Delta Logo
2:45 pm - 11:23 pm
YVR
-
STL
6h 38m
1 stop
Delta Logo
11:18 am - 8:31 pm
STL
-
YVR
11h 13m
1 stop
$293Delta
Mon, Sep 21 - Wed, Sep 30
American Airlines Logo
3:15 pm - 8:46 am
YHZ
-
STL
19h 31m
1 stop
American Airlines Logo
4:37 pm - 2:33 pm
STL
-
YHZ
19h 56m
1 stop
$299American Airlines
Mon, Sep 21 - Wed, Sep 30
American Airlines Logo
3:15 pm - 8:46 am
YHZ
-
STL
19h 31m
1 stop
American Airlines Logo
6:00 am - 2:55 pm
STL
-
YHZ
6h 55m
1 stop
$305American Airlines
Thu, Jun 25 - Sun, Jun 28
Air Canada Logo
7:00 am - 12:21 pm
YOW
-
STL
6h 21m
1 stop
Air Canada Logo
2:15 pm - 9:20 pm
STL
-
YOW
6h 05m
1 stop
$315Air Canada
Tue, Oct 6 - Sat, Oct 10
Air Canada Logo
9:00 am - 2:00 pm
YHZ
-
STL
7h 00m
1 stop
Air Canada Logo
2:40 pm - 9:54 pm
STL
-
YHZ
5h 14m
1 stop
$318Air Canada
Thu, Sep 17 - Sun, Sep 20
WestJet Logo
6:00 am - 11:20 pm
YVR
-
STL
15h 20m
1 stop
WestJet Logo
6:25 am - 8:26 pm
STL
-
YVR
16h 01m
1 stop
$333WestJet
Thu, Aug 6 - Wed, Aug 12
WestJet Logo
8:25 pm - 9:54 am
YVR
-
STL
11h 29m
2 stops
WestJet Logo
12:52 pm - 12:15 am
STL
-
YVR
13h 23m
2 stops
$334WestJet
Tue, Oct 27 - Wed, Oct 28
Alaska Airlines Logo
2:10 pm - 11:59 pm
YYJ
-
STL
7h 49m
1 stop
Alaska Airlines Logo
7:00 am - 1:20 pm
STL
-
YYJ
8h 20m
1 stop
$572Alaska Airlines
Tue, Oct 27 - Wed, Oct 28
Alaska Airlines Logo
2:10 pm - 11:59 pm
YYJ
-
STL
7h 49m
1 stop
Alaska Airlines Logo
7:00 am - 1:20 pm
STL
-
YYJ
8h 20m
1 stop
$574Alaska 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 7 days.

In the last 7 days, the cheapest flight deal to St. Louis was found on the route from Vancouver, at $263 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $313 in the last 7 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 $404. 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 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 January, where tickets cost $395 on average for return flights. On the other hand, the most expensive months are March and April, where the average cost of tickets from Canada is $925 and $608 respectively. For one-way flights, the best month to travel is June with an average price of $473.

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 in the morning, which is peak travel time and where the average cost of a ticket is $512.

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 3 weeks before departure, which saves you about 59% 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$152
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly and prices are also 8% lower on average.
Flight from Vancouver to St. Louis

FAQs - booking St. Louis flights

  • What is the cheapest flight to St. Louis?

    In the last 7 days, the cheapest flight deal to St. Louis was found on the route from Vancouver, at $263 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $313 in the last 7 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 $497. The cheapest price found on KAYAK in the last 2 weeks cost $254 and departed from Montreal Pierre Elliott Trudeau 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 $404 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 12437 reviews
8.5Crew
8.1Boarding
7.1Food
7.0Entertainment
7.8Comfort
Airline reviews

Terrible experience with an extremely obese passenger seated directly behind me - who snored and gagged so loudly, even throughout takeoff, that no one within ten rows could have gotten any rest even with earplugs! I get that this poor person has a serious health issue, and that Alaska (maybe) had no way to prepare in advance (though he did occupy two seats). Still there must be a way to take a six-hour flight without feeling like I'm next to a roaring grizzly bear.

2.0 MediocreAnonymous, May 2026
EWR - SFO
Read more Alaska Airlines reviews

Terrible experience with an extremely obese passenger seated directly behind me - who snored and gagged so loudly, even throughout takeoff, that no one within ten rows could have gotten any rest even with earplugs! I get that this poor person has a serious health issue, and that Alaska (maybe) had no way to prepare in advance (though he did occupy two seats). Still there must be a way to take a six-hour flight without feeling like I'm next to a roaring grizzly bear.

Nice to get moved from a middle seat to an aisle seat upon request, but why wasn’t I put in an aisle seat to begin with? The flight was not full.

It might not have been their fault, but there was a two hour delay due to weather. Then we boarded and were about to leave when they said there were more problems at the destination, took us back to the gate where we had to fully deplane. But then five minutes later, they said everything was fine and to get back on the plane. This was the part that pissed everybody off.

I'm tall and the seats do not have a headrest so its hard to get comfortable. Staff and checking were all great.

Internet was great. It was nice to watch a movie. The crew was very nice.

It was efficient and great. DIA took a while to let us leave but other than that it was great.

I was surprised by everything. The cleanliness, the punctuality, the friendliness of the crew… and the Wi-Fi! Please keep up the good work.

Good flight overall. Lots of bumps during flight but pilot kept searching for smooth air

90 minute delay boarding the plane, 45 minute delay on the terminal, 2 hours late arriving, currently waiting 45 minutes on the tarmac for a gate so we can BEGIN deboarding. Absolute mess. Definitely will be my last flight with Alaska.

Flight was delayed with no explication. There was ice falling out of vents on me.

Was put into a seat right behind the toilet that had no entertainment possible but did have plenty of leg room over noisy part of plane.

The passport line was so long that many of us were concerned about missing our flight and some did. It would've helped if a AA representative had gone to the passport check-in sooner to advise that boarding was closing and those flying that were stuck back in the line, needed to come forward with apologies to others. An AA representative did do that but only after boarding had already closed. (They delayed take-off so that more who were running with carry-ons could get to the gate - especially stressful for older people!) Then to be crammed into a seat with barely enough leg room for a thin woman, 5'7", like me, much less for a taller, bigger person was not comfortable, especially if the person in front decided to lean back. Crew was fine, food and entertainment also.

Movies on my phone are great. It would be nice to have a gluten free snack option.

It was what i expected. I like the movies you can access from your phone. It would be nice if there was a gluten free snack offered. But I did bring my own snack knowing there would not be a gluten free option

The flight was peaceful, just s slight turbulence, pilots and crews were all nice and made a great job! Arrived safely in the Philippines. Thank you ya’ll!

Ontario airport boarding was very easy to park and access, is clean and TSA took 10 minutes total. Check-in was a breeze and cruise was very nice.

American Airlines II: Delay Boogaloo. Multiple gate changes, delays, boarded and then MORE delays. I hate to say this won’t matter, but posting stuff about major corporations in 2026 is a post-modern “scream into the void.” Was multiple hours late coming home, so there you go.

Awful, tons of delays, I got into Chicago multiple hours late meaning I hit the very traffic I tried so desperately to avoid. Just empty apologies from American Airlines text alerts. Trash behavior from a trash airline.

The flight attendants were very friendly, efficient, and helpful. The plane was ahead of schedule, and it all went very smoothly. Thank you.

They lost my baggage and I am still struggling to the information and update

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

Pretzels were a bit dry and dusty, however it is nice to have a choice between sweet and savory snacks.

Flight crew was great, and even the crew for checking bags! I had a question for a friend of mine flying tomorrow and the man I talked to was awesome and answered my questions and looked up things for me when he didn’t have to! I was able to give her current & accurate info for her flight and she was so appreciative too!!

Never flown with Air Canada before, but it's now a top choice! Loved it!

Horrible crew, horrible seats configuration, ridiculous space in the toilets, Air Canada is no longer a option.

Crew at gate and onboard were just very OK, not very friendly and honestly seemed bothered to be there. I will give a shout out to still selling headphones for those who forgot.

Flight Boarded and departed on time. The Flight crew was very friendly and accommodating. The aircraft was clean and free from clutter and debris. I will be happy to recommend Air Canada to my friends and relatives for their flight needs. They were very attentive and responsive to our needs as Senior citizens.

Another good flight experience with Air Canada. The business section did not feature the full length sleeping arrangement, but this was a shorter trip. The food was excellent. But the flight crew was truly top tier: friendly, cheerful, helpful at all the right times. Air Canada truly outshines all U.S. carriers.

Flight operated by PAL. We boarded, and one engine started. The crew found some problem that could not be fixed. The flight was canceled. This run from yhz-bos is very unreliable.

Everything. The crew was so friendly, helpful & smiled. We had an excellent flight getting in earlier.

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