$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 6/29. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

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

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

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

Flight Deals
Booking Insights
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, Sep 22 - Sat, Sep 26
United Airlines Logo
3:35 pm - 11:50 pm
YVR
-
STL
6h 15m
1 stop
United Airlines Logo
5:10 am - 2:06 pm
STL
-
YVR
10h 56m
1 stop
$277United Airlines
Tue, Sep 22 - Sat, Sep 26
United Airlines Logo
2:20 pm - 11:50 pm
YVR
-
STL
7h 30m
1 stop
United Airlines Logo
5:10 am - 2:06 pm
STL
-
YVR
10h 56m
1 stop
$278United Airlines
Wed, Jun 3 - Tue, Jun 9
Air Canada Logo
6:00 am - 12:06 pm
YHZ
-
STL
8h 06m
1 stop
Air Canada Logo
8:40 am - 8:30 pm
STL
-
YHZ
9h 50m
2 stops
$292Air Canada
Wed, Jun 3 - Tue, Jun 9
Air Canada Logo
6:20 am - 12:06 pm
YHZ
-
STL
7h 46m
2 stops
Air Canada Logo
8:40 am - 8:30 pm
STL
-
YHZ
9h 50m
2 stops
$293Air Canada
Fri, Jun 12 - Sat, Jun 20
Delta Logo
2:45 pm - 11:23 pm
YVR
-
STL
6h 38m
1 stop
Delta Logo
8:00 am - 12:15 pm
STL
-
YVR
6h 15m
1 stop
$333Delta
Wed, May 27 - Wed, Jun 10
American Airlines Logo
11:39 am - 8:30 pm
YYZ
-
STL
9h 51m
1 stop
American Airlines Logo
7:03 am - 5:44 pm
STL
-
YYZ
9h 41m
1 stop
$344American Airlines
Wed, May 27 - Wed, Jun 10
American Airlines Logo
1:15 pm - 11:54 pm
YYZ
-
STL
11h 39m
1 stop
American Airlines Logo
7:03 am - 5:44 pm
STL
-
YYZ
9h 41m
1 stop
$345American Airlines
Fri, Jun 12 - Sat, Jun 20
Delta Logo
2:45 pm - 11:23 pm
YVR
-
STL
6h 38m
1 stop
Delta Logo
8:00 am - 12:15 pm
STL
-
YVR
6h 15m
1 stop
$372Delta
Thu, Jun 4 - Mon, Jun 8
Alaska Airlines Logo
11:46 am - 11:54 pm
YEG
-
STL
11h 08m
1 stop
Alaska Airlines Logo
5:33 pm - 10:56 am
STL
-
YEG
18h 23m
2 stops
$594Alaska Airlines
Tue, Sep 22 - Sat, Sep 26
Alaska Airlines Logo
6:07 am - 5:03 pm
YYJ
-
STL
8h 56m
2 stops
Alaska Airlines Logo
6:00 am - 12:26 pm
STL
-
YYJ
8h 26m
1 stop
$600Alaska 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 $277 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $296 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 $402 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 $389. On the other hand, the most expensive day to fly is Thursday, where round-trip prices are $528 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 $625 respectively. For one-way flights, the best month to travel is June with an average price of $536.

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 $372 on average. The most expensive time of day to fly to St. Louis is generally in the evening, which is peak travel time and where the average cost of a ticket is $423.

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 58% 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$163
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 $277 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $296 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 $402. 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 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 12324 reviews
7.1Food
8.1Boarding
7.0Entertainment
8.5Crew
7.8Comfort
Airline reviews

I had to cancel my trip due to medical reasons. I have been unable to cancel online through either Kayak or Alaska Airlines.. I am trying to get my insured trip reimbursed by XCover. They are requiring a notice of cancellation or not using to get my refund. Please help me get that information. I have been unable to get this information from either Kayak or Alaska Airlines.

2.0 MediocreDave, May 2026
PSP - SEA
Read more Alaska Airlines reviews

I had to cancel my trip due to medical reasons. I have been unable to cancel online through either Kayak or Alaska Airlines.. I am trying to get my insured trip reimbursed by XCover. They are requiring a notice of cancellation or not using to get my refund. Please help me get that information. I have been unable to get this information from either Kayak or Alaska Airlines.

Attentive and kind staff. Decent boarding for wheelchair bound partner, off boarding is a little lengthy due to waiting for everyone to deplane before aisle chair can arrive. Not sure if there’s a better option.

Alaska is by far the best airline to fly with 😍

They were flexible and able to get me home a day earlier due to a family members illness. Flight was on time and great friendly crew.

We got window seats and there was no window to look out at very disappointed in paying for a no window seat

We took off on time and rose into the wild blue yonder safely, and landed at our destination safely eighteen minutes early. In between we enjoyed a smooth flight and wonderful service by a great crew. Flight attendants and pilots made sure the trip was a memorable and happy experience. Can’t beat that!

The flight crew home was so, so friendly and HILARIOUS. I’ll keep flying Alaska like I have for the last 30+ years!

Affirmed my disability by allowing me to board when most accessible. Very parable, helpful and friendly staff. Smooth flight overall! I always fly Alaska when possible! Thank you!

Our flight from Raleigh to Seattle delayed by hour plus. We missed connection as we couldn’t get to next gate in time Then we waited till 2:30 plane and then sat on tarmac loaded for half hour then our luggage couldn’t be found finally found where it was 2 employees sent us in wrong direction

Agent could not provide me a boarding pass for the second leg of my flights - yet with a partner airline. Not understood.

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.

They lost my bag. ... And I asked them 3 times to 3 different people if my checked bag will maKe it all the way - they all confirmed and at the end it was left at the connection... Bravo

Cancelled BOYH legs of our flight home 30 min before initial boarding

Cancelled the flight half hour before boarding. Then cancelled the connecting flight too.

Delayed due to weather in Dallas (arriving flight arrived late), then boarded the plane only to deboard immediately afterwards, tire needed to be replaced. Flight supposed to depart at 6:15pm but departed at 9:35pm.

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

I would like a refund for the extra cost the seat I paid for. An oversized person sat next to me and I couldn’t fit on my seat and had to move to another seat.

Boarding gate at LAX was too crowded—two gates next to one another

The flight was delayed about an hour for a maintenance specialist to approve the maintenance repair

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.

The seat design in the premium economy section leaves virtually no room under the seat to store a bag or purse. Other than that, it was a great flight. Arrived early.

The flight was delayed, but not for weather. We landed over 3hrs later than planned.

The stag were helpful, kind and liked the passengers. The plane was pristinely clean! Great flight!

My flight was delayed more than once, but Air Canada updated us regularly. Friends on other airlines had much worse experiences.

My ticket did not exist when I got to the airport. I had to book another flight and was still charged by Kayak

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