$161 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 5/28. 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

Fri, Jun 12 - Sat, Jun 20
Delta Logo
2:45 pm - 11:23 pm
YVR
-
STL
6h 38m
1 stop
Delta Logo
5:00 pm - 10:35 pm
STL
-
YVR
7h 35m
1 stop
$303Delta
Fri, Jun 5 - Tue, Jun 9
United Airlines Logo
11:35 pm - 8:39 am
YVR
-
STL
7h 04m
1 stop
United Airlines Logo
5:10 am - 6:18 pm
STL
-
YVR
15h 08m
1 stop
$309United Airlines
Mon, Sep 21 - Wed, Sep 30
American Airlines Logo
2:55 pm - 8:39 am
YHZ
-
STL
19h 44m
1 stop
American Airlines Logo
3:29 pm - 2:10 pm
STL
-
YHZ
20h 41m
1 stop
$321American Airlines
Mon, Sep 21 - Wed, Sep 30
American Airlines Logo
2:55 pm - 10:24 pm
YHZ
-
STL
9h 29m
1 stop
American Airlines Logo
3:29 pm - 2:10 pm
STL
-
YHZ
20h 41m
1 stop
$336American Airlines
Wed, Jul 8 - Mon, Jul 13
Multiple Airlines Logo
12:30 am - 5:37 pm
YYC
-
STL
16h 07m
1 stop
Multiple Airlines Logo
4:52 pm - 9:50 pm
STL
-
YYC
29h 58m
1 stop
$337Multiple Airlines
Mon, Sep 21 - Wed, Sep 30
Air Canada Logo
4:10 pm - 8:00 pm
YHZ
-
STL
5h 50m
1 stop
Air Canada Logo
8:55 am - 11:55 pm
STL
-
YHZ
13h 00m
2 stops
$342Air Canada
Mon, Sep 21 - Wed, Sep 30
Air Canada Logo
4:10 pm - 8:00 pm
YHZ
-
STL
5h 50m
1 stop
Air Canada Logo
8:55 am - 11:55 pm
STL
-
YHZ
13h 00m
2 stops
$343Air Canada
Wed, Jul 8 - Mon, Jul 13
Multiple Airlines Logo
12:30 am - 5:37 pm
YYC
-
STL
16h 07m
1 stop
Multiple Airlines Logo
4:52 pm - 3:15 pm
STL
-
YYC
23h 23m
2 stops
$346Multiple Airlines
Fri, Jun 5 - Mon, Jun 8
Alaska Airlines Logo
11:46 am - 4:37 pm
YEG
-
STL
27h 51m
2 stops
Alaska Airlines Logo
7:41 pm - 10:56 am
STL
-
YEG
16h 15m
1 stop
$515Alaska Airlines
Fri, Jun 5 - Mon, Jun 8
Alaska Airlines Logo
11:46 am - 11:54 pm
YEG
-
STL
11h 08m
1 stop
Alaska Airlines Logo
7:41 pm - 10:56 am
STL
-
YEG
16h 15m
1 stop
$516Alaska 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 72 hours.

In the last 3 days, the cheapest flight deal to St. Louis was found on the route from Vancouver, at $303 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $306 in the last 3 days.

How much is a flight to St. Louis?

The average and cheapest price for all round-trip flights to St. Louis from each origin found by users searching on KAYAK in the last month.

A flight to St. Louis costs $398 on average. The cheapest price found on KAYAK in the last 2 weeks cost $247 and departed from Toronto Pearson Intl Airport. The most popular routes on KAYAK are Toronto to St. Louis which costs $404 on average, and Montreal to St. Louis, which costs $690 on average.

See prices from:

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 Tuesday where round-trip tickets can be as cheap as $388. On the other hand, the most expensive day to fly is Wednesday, where round-trip prices are $496 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 June, where tickets cost $347 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 September with an average price of $537.

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 morning, when round-trip flights cost $349 on average. The most expensive time of day to fly to St. Louis is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $408.

What is a good deal for flights to St. Louis?

If you’re looking for cheap airfare to St. Louis, 25% of our users found tickets to St. Louis for the following prices or less: From Montreal Pierre Elliott Trudeau Intl Airport $669 round-trip.

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$161
Best time to beat the crowds with an average 8% 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 3 days, the cheapest flight deal to St. Louis was found on the route from Vancouver, at $303 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $306 in the last 3 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 $398. The cheapest price found on KAYAK in the last 2 weeks cost $247 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 $270 or less one-way and $536 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 4 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 12367 reviews
8.1Boarding
8.5Crew
7.0Entertainment
7.0Food
7.8Comfort
Airline reviews

Flight was delayed by 3 hrs. Forcing missed connection and overnight stay. Terrible.

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

Flight was delayed by 3 hrs. Forcing missed connection and overnight stay. Terrible.

Comfortable seats, good drinks with lots of water refills, staff was kind and understanding of my disabled mother!

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

The plane was to narrow. Uncomfortable seats.. Kayak is Awesome!

It is a hassle to not have entertainment screens on the backs of the seats.

Considering my flight to Portland was in a broken chair that I had paid extra for, this one was great. So yeah, wonderful.

Even though I booked two tickets at the same time, we were unable to sit together. No one cared. I was disappointed due to the amount of money the flights had been that there was no way to get it changed.

I had to cancel this trip due to medical reasons. I took out flight insurance but I was unable to cancel my reservation on either Kayak or Alaska. I need proof that I did not take this flight to get my refund. I have tried for a week and a half together that information from either Kayak or Alaska but so far I have gotten no response. I am very disappointed!

Made our reservations 6 months ago. When we arrived at the airport we were informed they no longer have assigned seating. We were placed in the last row next to the restrooms. Our seats did not recline. I do not like the fact you are assigning seats. I don’t feel it’s fair. People who make last minute reservations sit in the middle seats. It’s did Southwest now have assigned seating and you assign seats. Even Southwest was more fair than Alaska.

We had paid for window seats just to not get window seats. When we ask the flight attendant to switch seats she said no because it was a full flight. It was the the worst experience I had ever.

Seats very comfortable; service efficient and pleasant; flight was on-time; boarding organized.

Starlink is great Crew was polite Business class didn’t get a welcome drink just water and snacks were ok

very average service no complimentary alcoholics drinks unlike other airlines such as Porter airlines No decent seats available during check-in time the day before

Good but airlines getting smaller. I didn't like the meal but the service was fine. Flight was fine and luggage arrived. So good.

They were fast and I like how they used to entertainment system to play video about the safety.

Hopped on time for the flight only to get deplaned and delayed another 2.5 hours.

Given I (and I’m assuming most people) have both carry in and a personal item included in their fare, I find it very unfair that on neither of my flights I was able to use the overhead for my small backpack because they were completely rammed with luggage, people personal items, jackets, hats and other items. So the only item I brought in had to be stuffed under my seat while they had their leg room and sat comfortable with all of their items in the overhead. This has to stop because I was uncomfortable on both flights when I only had one smaller item that could not be checked due to its contents (medication etc). Plenty of people could have checked theirs but chose not to and then took up the space allotment for 2 people.

Flight attendants had a little attitude. Food tastes no good.

Airport terminal was outdated, flight was on a small jet with no wifi

From pre boarding to flight attendant, crew and baggage handler, excellent. Didn’t lost my luggage like West jet.

Seat comfort was poor (no lumbar or lower back support).

The airplane seats were spacious and comfortable, and the flight attendants were friendly and attentive. The food was delicious like never before. The blankets and toiletries were thoughtfully provided. The captain's navigation was steady and reliable. In short, having flown with Starlux, I won't consider any other airline next time.

STOP MAKING THE SEATING SO CRAMPED. WE NEED A PASSENGER BILL OF RIGHTS!

The passenger in front of of me reclined their seat back all the way the entire flight. Their headrest was in my face the entire flight! I barely had room for the little plastic cup of water to fit on my tray table; can you make the seats and space between the rows any smaller??? You can’t even get up to use the restroom! Worst flight I’ve had in a very long time!

We had several flights and they were all on-time and flawless

My Frequent Flyer nber wasn't put on as I was told it was..... This resulted in a last group boarding and no priority tags on My bags.

Terrible steward... Plane was quite empty... I asked to move "back" in the plane and the steward said no... Unnecessary power trip of mediocre people.

The small flights with Valet Luggage has a poor service

not sure why you ask about food, I n3ver get food on flights except maybe cookies or pretzels. wifi was slow and in and out most of the flight not good.

Everything was fine except the end of the flight. We spent more than an hour circling around Miami due to weather conditions. That was not good.

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.

Flight itself was not bad at all. However: my checked bag (checked in Calgary) did not make it onto this flight as I found out after I landed at EWR. I still don't have it but it appears that it is on its way to me.

Flight and attendance were very good we had 2 hour delay that took the shine of it

After 3 hours of delays, they ended up cancelling my flight. And although I could purchase one-way tickets to get to my destination, they would not offer me these flights as compensation for the cancelled flight, and I didn't end up making it home until 13 hours after I was originally supposed to arrive. It made for an extremely strenuous end to an otherwise good trip.

Be careful about the bad policy and when purchasing seats

Very disappointed with premier lounge. Food selection very poor, both coffee machines out of order. For the price you charge for an upgrade, the seats don’t fully recline, movie selection is old. Not very good value. Asian airlines are light years ahead at a more affordable price.

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