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St. Louis

$158+ 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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
Jul 23 — Jul 301
Thu 7/23
Thu 7/30
1 adult, Economy
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Cheap 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 June 23, 2026.

This United Airlines deal was found by Cheapflights users on 6/21. 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.
Thu 10/112:10 pm
YVR
-
STL
1 stop8h 20m
United Airlines
Mon 10/59:04 am
STL
-
YVR
1 stop15h 22m
United Airlines
Deal found 6/21$282
This United Airlines deal was found by Cheapflights users on 6/22. 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.
Mon 11/29:30 am
YVR
-
STL
1 stop9h 04m
United Airlines
Wed 11/41:39 pm
STL
-
YVR
1 stop7h 25m
United Airlines
Deal found 6/22$288
This American Airlines deal was found by Cheapflights users on 6/19. 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.
Wed 9/93:13 pm
YYZ
-
STL
1 stop10h 14m
American Airlines
Tue 9/225:00 am
STL
-
YYZ
1 stop8h 32m
American Airlines
Deal found 6/19$318
This American Airlines deal was found by Cheapflights users on 6/21. 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.
Sat 7/251:17 pm
YYZ
-
STL
1 stop11h 58m
American Airlines
Wed 7/296:55 am
STL
-
YYZ
1 stop9h 39m
American Airlines
Deal found 6/21$329
This Delta deal was found by Cheapflights users on 6/18. 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.
Mon 11/21:15 pm
YVR
-
STL
1 stop9h 21m
Delta
Wed 11/42:15 pm
STL
-
YVR
1 stop11h 22m
Delta
Deal found 6/18$337
This American Airlines deal was found by Cheapflights users on 6/20. 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.
Tue 7/217:17 am
YYZ
-
STL
1 stop7h 36m
American Airlines
Tue 7/286:55 am
STL
-
YYZ
1 stop9h 39m
American Airlines
Deal found 6/20$339
This Kiwi.com deal was found by Cheapflights users on 6/22. 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.
Thu 9/2412:20 am
YYC
-
STL
1 stop8h 20m
Multiple Airlines
Mon 9/2810:35 am
STL
-
YYC
1 stop12h 15m
Multiple Airlines
Deal found 6/22$347
This United Airlines deal was found by Cheapflights users on 6/19. 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.
Thu 7/911:35 pm
YVR
-
STL
1 stop14h 11m
United Airlines
Tue 7/214:48 pm
STL
-
YVR
2 stops24h 35m
United Airlines
Deal found 6/19$348
This Delta deal was found by Cheapflights users on 6/22. 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.
Fri 9/187:45 am
YYC
-
STL
1 stop8h 52m
Delta
Mon 9/212:25 pm
STL
-
YYC
1 stop9h 41m
Delta
Deal found 6/22$350
This Air Canada deal was found by Cheapflights users on 6/22. 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 8/2512:35 pm
YHZ
-
STL
1 stop8h 07m
Air Canada
Wed 8/268:55 am
STL
-
YHZ
2 stops9h 35m
Air Canada
Deal found 6/22$353
This Air Canada deal was found by Cheapflights users on 6/21. 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.
Mon 9/212:05 pm
YHZ
-
STL
1 stop8h 15m
Air Canada
Wed 9/308:55 am
STL
-
YHZ
1 stop6h 19m
Air Canada
Deal found 6/21$354
This American Airlines deal was found by Cheapflights users on 6/19. 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.
Thu 9/103:35 pm
YHZ
-
STL
1 stop20h 40m
American Airlines
Fri 9/186:00 am
STL
-
YHZ
1 stop6h 33m
American Airlines
Deal found 6/19$355

Find 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 June 23, 2026.

Round-trip from

$282
(United Airlines)

One-way from

$158
(Air Canada)

Popular in

March

Cheapest in

January

Average price

$454

Good round-trip deal

$450 or less

Good one-way deal

$326 or less
From Canada to Lambert-St Louis
Search Deals
One-way flight from Canada to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($128 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
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 June 23, 2026.
Use the filters below to find and compare flights from Canada to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Thu 10/1

12:10 pm-10:30 pm

1 stop8h 20m

Lambert-St Louis

Mon 10/5

9:04 am-10:26 pm

1 stop15h 22m

$282

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Mon 11/2

9:30 am-7:34 pm

1 stop9h 04m

Lambert-St Louis

Wed 11/4

4:40 pm-1:30 pm

2 stops21h 50m

$288

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Wed 7/15

11:35 pm-3:46 pm

1 stop14h 11m

Lambert-St Louis

Mon 7/20

5:10 am-6:18 pm

1 stop15h 08m

$288

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Mon 11/2

1:15 pm-11:36 pm

1 stop9h 21m

Lambert-St Louis

Wed 11/4

2:15 pm-12:37 am

1 stop11h 22m

$337

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 9/18

7:45 am-5:37 pm

1 stop8h 52m

Lambert-St Louis

Mon 9/21

2:25 pm-11:06 pm

1 stop9h 41m

$350

HalifaxSt. Louis

YHZ - STL

YHZSTL

Halifax Intl

Tue 8/25

12:35 pm-6:42 pm

1 stop8h 07m

Lambert-St Louis

Wed 8/26

8:55 am-5:14 pm

1 stop6h 19m

$353

HalifaxSt. Louis

YHZ - STL

YHZSTL

Halifax Intl

Mon 9/21

2:05 pm-8:20 pm

1 stop8h 15m

Lambert-St Louis

Wed 9/30

8:55 am-5:14 pm

1 stop6h 19m

$354

HalifaxSt. Louis

YHZ - STL

YHZSTL

Halifax Intl

Thu 9/10

3:35 pm-10:15 am

1 stop20h 40m

Lambert-St Louis

Fri 9/18

6:00 am-2:33 pm

1 stop6h 33m

$355

HalifaxSt. Louis

YHZ - STL

YHZSTL

Halifax Intl

Mon 8/31

7:15 am-2:02 pm

2 stops8h 47m

Lambert-St Louis

Tue 9/1

8:55 am-8:30 pm

2 stops9h 35m

$359

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 10/15

7:00 am-3:58 pm

1 stop7h 58m

Lambert-St Louis

Sun 10/18

9:00 am-5:10 pm

1 stop9h 10m

$364

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/20

Showing 1-10 of 60 resultsSorted by cheapest first
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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, August is the cheapest month in which you can book a flight from Canada to St. Louis (average of $154). Flying from Canada to St. Louis in September is currently the most expensive (average of $329). 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 June 23, 2026.

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 at noon, which can drop the price by up to 20% versus a flight in the afternoon.

Weekly flight availability from Canada to St. Louis

Explore weekly flight availability from Canada to St. Louis. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 23, 2026.

The most flights from CA0 to STL are scheduled on a Monday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 on average).

How far ahead should I book a flight from Canada to St. Louis?

Booking 47 days in advance of your planned departure date is, on average, the best time to get cheap flights from Canada to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 June 23, 2026.
Read reviews from past customers who have flown Alaska Airlines,American Airlines, andAir Canada 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.
Alaska Airlines
7.9
Good
12,565 reviews

Crew

8.5

Overall

7.9

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Food

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Alaska Airlines
7.9
Good
12,565 reviews
Alaska Airlines
7.9
Good
12,565 reviews

Crew

8.5

Overall

7.9

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Food

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
American Airlines
7.1
Good
11,748 reviews
Alaska Airlines
7.9
Good
12,565 reviews

Crew

8.5

Overall

7.9

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Food

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Air Canada
7.1
Good
11,248 reviews
Alaska Airlines
7.9
Good
12,565 reviews

Crew

8.5

Overall

7.9

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Food

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.

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 8h 07m. Fly via United Airlines, Delta, 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 $152 on United Airlines. Other airlines that offer cheap prices include Delta from $162 and American Airlines from $170 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 (88%), Jazz (87%) or United Airlines (81%) 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 $445. While the most popular route (Toronto Pearson Intl - Lambert-St Louis) can be booked for $385 on average, our data indicates $476 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, August is the cheapest month in which you can book a flight from Canada to St. Louis (average of $154). Flying from Canada to St. Louis in September is currently the most expensive (average of $329). 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
Fenton
Swansea
Fairview Heights
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Alton
Farmington

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Alternative routes for Canada to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Canada to St. Louis

Discover the top 3 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 June 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$256Average$485FlexibilityNo cancel feeOn-time67%
Alaska AirlinesCheapest$344Average$443FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$347Average$440FlexibilityNo cancel feeOn-time71%

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