HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$136+ Cheap flights from Canada to St. Louis (STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/13. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
Nov 30 — Dec 71
Sun 11/30
Sun 12/7
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Canada to St. Louis with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Find flight deals from Canada to St. Louis

Cheapest flights from Canada to St. Louis
Explore the most affordable flight options available from Canada to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 31, 2025.

This American Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/221:31 pmYYC - STL
1 stop22h 46mAmerican Airlines
Tue 12/308:01 pmSTL - YYC
1 stop17h 50mAmerican Airlines
Deal found 10/30$249
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2611:00 pmYVR - STL
1 stop13h 29mMultiple Airlines
Wed 12/37:43 pmSTL - YVR
2 stops18h 57mMultiple Airlines
Deal found 10/29$274
This Air Canada deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/275:35 amYHZ - STL
2 stops11h 54mAir Canada
Tue 12/24:05 pmSTL - YHZ
1 stop6h 21mAir Canada
Deal found 10/29$288
This United deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/203:10 pmYOW - STL
1 stop9h 23mMultiple Airlines
Mon 1/54:05 pmSTL - YOW
1 stop6h 03mMultiple Airlines
Deal found 10/29$307
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/512:50 pmYYZ - STL
1 stop10h 43mMultiple Airlines
Sun 12/149:54 amSTL - YYZ
1 stop24h 49mMultiple Airlines
Deal found 10/29$319
This Air Canada deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/256:00 amYEG - STL
1 stop8h 29mAir Canada
Tue 12/24:05 pmSTL - YEG
1 stop8h 10mAir Canada
Deal found 10/28$338
This United Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/205:59 pmYOW - STL
1 stop6h 34mUnited Airlines
Mon 1/56:35 pmSTL - YOW
2 stops18h 55mUnited Airlines
Deal found 10/29$354
This Delta deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2512:07 pmYVR - STL
1 stop9h 16mDelta
Tue 12/26:30 amSTL - YVR
1 stop7h 57mDelta
Deal found 10/29$358
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/104:00 pmYYZ - STL
2 stops27h 36mMultiple Airlines
Thu 11/204:13 pmSTL - YYZ
1 stop6h 58mMultiple Airlines
Deal found 10/29$362
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1911:15 amYYZ - STL
1 stop23h 43mMultiple Airlines
Fri 11/283:53 pmSTL - YYZ
2 stops15h 45mMultiple Airlines
Deal found 10/29$364
This Air Canada deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/192:00 pmYYZ - STL
Nonstop2h 29mAir Canada
Sun 1/44:05 pmSTL - YYZ
Nonstop2h 01mAir Canada
Deal found 10/30$372
This Delta deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2612:07 pmYVR - STL
1 stop9h 16mDelta
Wed 12/32:20 pmSTL - YVR
1 stop10h 24mDelta
Deal found 10/29$381

Cheap flight deals from Canada to St. Louis

Keep the following information in mind while searching for Canada to St. Louis flight deals. Data was last updated October 31, 2025.

Round-trip from

$242
(Kiwi.com)

One-way from

$136
(Kiwi.com)

Popular in

September

Cheapest in

June

Average price

$465

Good round-trip deal

$489 or less

Good one-way deal

$323 or less
From Canada to Lambert-St Louis
Search Deals
One-way flight from Canada to Lambert-St Louis
Search Deals
High demand for flights, 2% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Canada to Lambert-St Louis.
Search Deals
Price to beat on a one-way flight from Canada to Lambert-St Louis.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Canada to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 31, 2025.
Use the filters below to find and compare flights from Canada to St. Louis that are best for you.

Fly from

Canada

Fly to

St. Louis

Route

Depart

Return

Price

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 12/22

1:31 pm-1:17 pm

1 stop22h 46m

Lambert-St Louis

Tue 12/30

8:01 pm-12:51 pm

1 stop17h 50m

$249

HalifaxSt. Louis

YHZ - STL

YHZSTL

Halifax Intl

Tue 4/7

2:50 pm-9:55 pm

1 stop9h 05m

Lambert-St Louis

Wed 4/8

6:30 am-1:54 pm

1 stop5h 24m

$280

HalifaxSt. Louis

YHZ - STL

YHZSTL

Halifax Intl

Thu 11/27

5:35 am-3:29 pm

2 stops11h 54m

Lambert-St Louis

Tue 12/2

4:05 pm-12:26 am

1 stop6h 21m

$288

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Tue 3/3

8:30 am-10:14 pm

2 stops11h 44m

Lambert-St Louis

Wed 3/4

8:41 am-1:58 pm

1 stop7h 17m

$298

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Tue 4/7

6:52 am-12:20 pm

1 stop6h 28m

Lambert-St Louis

Wed 4/8

6:30 am-12:41 pm

1 stop5h 11m

$301

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 1/21

11:30 am-6:14 pm

1 stop7h 44m

Lambert-St Louis

Sat 1/24

6:43 pm-10:53 am

1 stop15h 10m

$303

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 12/20

3:10 pm-11:33 pm

1 stop9h 23m

Lambert-St Louis

Mon 1/5

4:05 pm-11:08 pm

1 stop6h 03m

$307

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 2/24

6:00 am-1:49 pm

1 stop8h 49m

Lambert-St Louis

Sun 3/1

7:00 am-7:01 pm

1 stop11h 01m

$320

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 1/13

11:30 am-6:16 pm

1 stop7h 46m

Lambert-St Louis

Fri 1/16

6:00 am-11:59 am

1 stop4h 59m

$336

EdmontonSt. Louis

YEG - STL

YEGSTL

Edmonton

Tue 11/25

6:00 am-3:29 pm

1 stop8h 29m

Lambert-St Louis

Tue 12/2

4:05 pm-11:15 pm

1 stop8h 10m

$338

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Canada to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Canada with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Canada to St. Louis

What is the cheapest month to book a flight from Canada to St. Louis?

Currently, December is the cheapest month in which you can book a flight from Canada to St. Louis (average of $146). Flying from Canada to St. Louis in September is currently the most expensive (average of $344). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CA to STL?

Find hourly flight availability from Canada to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 31, 2025.

When flying from Canada to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 14% versus a flight at noon.

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

Use this chart to determine the cheapest time to fly round-trip from Canada to St. Louis. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Canada to St. Louis flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated October 31, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and American Airlines from Canada to St. Louis. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
Delta
7.9
Good
7,998 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
United Airlines
7.4
Good
8,996 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
American Airlines
7.2
Good
11,034 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
Air Canada
7.1
Good
10,383 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!

Related info for your journey

Find useful and relevant information for your journey from Canada to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to St. Louis from Canada?

    Most people fly into Lambert-St Louis (STL) if they book a flight to St. Louis from Canada. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • How long is the flight from Canada to St. Louis?

    There are many flights that can get you from Canada to St. Louis in 9h 05m. Fly via American Airlines, United Airlines, or Air Canada to get the fastest option. The distance from Canada to St. Louis is about 1438 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Canada to St. Louis one-way?

    One-way options have recently been found by users for as low as $178 on United Airlines. Other airlines that offer cheap prices include Delta from $233 and Alaska Airlines from $390 one-way.

  • What are the most popular routes from Canada to St. Louis?

    Most travelers choose Toronto Pearson Intl - Lambert-St Louis, Montreal Pierre Elliott Trudeau Intl - Lambert-St Louis or Calgary - Lambert-St Louis when deciding on the best route from Canada to St. Louis.

  • What are the most reliable airlines from Canada to St. Louis?

    Consider Air Canada (82%), Jazz (82%) or United Airlines (82%) when booking your flight. These represent the most reliable airlines when flying from Canada to St. Louis.

  • What are the cheapest flights from Canada to St. Louis?

    Looking at all options, your cheapest flight can be booked for $297. While the most popular route (Toronto Pearson Intl - Lambert-St Louis) can be booked for $319 on average, our data indicates $422 when flying from Canada to St. Louis.

  • Can I find deals for flights from Canada to St. Louis that include hotel bookings?

    Yes. In addition to deals on Canada to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Canada to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Canada to St. Louis.

  • Can I find deals for business class flights from Canada to St. Louis?

    Yes. Cheapflights offers flight deals from Canada to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Canada to St. Louis?

    Currently, December is the cheapest month in which you can book a flight from Canada to St. Louis (average of $146). Flying from Canada to St. Louis in September is currently the most expensive (average of $344). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Canada to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Newark to St. Louis flights
John F Kennedy Intl to St. Louis flights
John F Kennedy Intl to Kansas City flights
LaGuardia to St. Louis flights
LaGuardia to Kansas City flights
Newark to Kansas City flights
Atlanta to St. Louis flights
Denver to Kansas City flights
Dallas/Fort Worth to Kansas City flights
Dallas/Fort Worth to St. Louis flights
Dulles Intl to Kansas City flights
Dulles Intl to St. Louis flights
Boston to Kansas City flights
Los Angeles to Kansas City flights
Denver to St. Louis flights
Boston to St. Louis flights
Hobby to St. Louis flights
Reagan-National to Kansas City flights
O'Hare Intl to Kansas City flights
Los Angeles to St. Louis flights
Atlanta to Kansas City flights
Hobby to Kansas City flights
Baltimore to St. Louis flights
Baltimore to Kansas City flights
Seattle to St. Louis flights
Seattle to Kansas City flights
San Francisco to St. Louis flights
George Bush Intcntl to St. Louis flights
Philadelphia to St. Louis flights
Wichita to St. Louis flights
O'Hare Intl to St. Louis flights
George Bush Intcntl to Kansas City flights
San Francisco to Kansas City flights
Raleigh to Kansas City flights
Orlando to St. Louis flights
Reagan-National to St. Louis flights
Minneapolis to St. Louis flights
Minneapolis to Kansas City flights
Detroit to St. Louis flights
Sky Harbor Intl to St. Louis flights
Sky Harbor Intl to Kansas City flights
Ontario to St. Louis flights
Orlando to Kansas City flights
Love Field to St. Louis flights
Ontario to Kansas City flights
Detroit to Kansas City flights
Tampa to Kansas City flights
Philadelphia to Kansas City flights
Indianapolis to Kansas City flights
Raleigh to St. Louis flights

Top 4 airlines flying from Canada to St. Louis

Discover the top 4 airlines that operate flights from Canada to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$288Average$442FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$295Average$498FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$324Average$535FlexibilityNo cancel feeOn-time67%
DeltaCheapest$452Average$511FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.