HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Canada

$137+ Cheap flights from St. Louis (STL) to Canada

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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
jul. 16 — jul. 231
mié. 7/16
mié. 7/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Canada 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.

Cheap flight deals from St. Louis to Canada

Keep the following information in mind while searching for St. Louis to Canada flight deals. Data was last updated julio 11, 2025.

Round-trip from

$315
(Kiwi.com)

One-way from

$137
(American Airlines)

Popular in

March

Cheapest in

January

Average price

$488

Good round-trip deal

$630 or less

Good one-way deal

$406 or less
From Lambert-St Louis to Canada
Search Deals
One-way flight from Lambert-St Louis to Canada
Search Deals
High demand for flights, 3% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals
Price to beat on a round-trip flight from Lambert-St Louis to Canada.
Search Deals
Price to beat on a one-way flight from Lambert-St Louis to Canada.
Search Deals

Find flight deals from St. Louis to Canada

Cheapest flights from St. Louis to Canada
Explore the most affordable flight options available from St. Louis to Canada. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/9. 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.
sáb. 9/137:55 pmSTL - YYC
1 stop19h 50mMultiple Airlines
dom. 9/218:55 amYYC - STL
1 stop23h 11mMultiple Airlines
Deal found 7/9$315
This American Airlines deal was found by Cheapflights users on 7/9. 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.
vie. 9/126:10 amSTL - YYC
1 stop18h 09mAmerican Airlines
mar. 9/166:29 amYYC - STL
1 stop13h 03mAmerican Airlines
Deal found 7/9$327
This American Airlines deal was found by Cheapflights users on 7/10. 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.
jue. 9/256:05 amSTL - YYZ
1 stop10h 42mAmerican Airlines
dom. 9/286:30 amYYZ - STL
1 stop9h 55mAmerican Airlines
Deal found 7/10$331
This American Airlines deal was found by Cheapflights users on 7/9. 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.
jue. 9/188:03 pmSTL - YUL
1 stop14h 42mAmerican Airlines
mar. 9/2312:31 pmYUL - STL
1 stop9h 01mAmerican Airlines
Deal found 7/9$334
This Kiwi.com deal was found by Cheapflights users on 7/9. 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.
mié. 8/611:24 amSTL - YYZ
1 stop10h 20mMultiple Airlines
mié. 8/139:50 amYYZ - STL
1 stop14h 57mMultiple Airlines
Deal found 7/9$344
This Kiwi.com deal was found by Cheapflights users on 7/9. 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.
jue. 8/72:36 pmSTL - YVR
2 stops33h 14mMultiple Airlines
jue. 8/141:15 pmYVR - STL
1 stop22h 17mMultiple Airlines
Deal found 7/9$352
This Alaska Airlines deal was found by Cheapflights users on 7/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/86:30 pmSTL - YVR
2 stops19h 57mAlaska Airlines
lun. 9/157:07 pmYVR - STL
2 stops17h 34mAlaska Airlines
Deal found 7/10$377
This Delta deal was found by Cheapflights users on 7/9. 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.
mar. 8/126:40 amSTL - YYZ
2 stops10h 19mDelta
mié. 8/2010:20 amYYZ - STL
1 stop8h 45mDelta
Deal found 7/9$390
This Air Canada deal was found by Cheapflights users on 7/9. 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.
sáb. 8/94:00 pmSTL - YYZ
Nonstop2h 00mAir Canada
dom. 8/172:15 pmYYZ - STL
Nonstop2h 06mAir Canada
Deal found 7/9$391
This United Airlines deal was found by Cheapflights users on 7/10. 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.
lun. 9/85:49 pmSTL - YVR
1 stop7h 33mUnited Airlines
lun. 9/1511:00 amYVR - STL
1 stop7h 46mUnited Airlines
Deal found 7/10$396
This Delta deal was found by Cheapflights users on 7/10. 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.
sáb. 11/156:45 amSTL - YUL
2 stops11h 06mDelta
mié. 11/1911:15 amYUL - STL
2 stops11h 44mDelta
Deal found 7/10$399
This United Airlines deal was found by Cheapflights users on 7/10. 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.
vie. 11/146:43 pmSTL - YYC
1 stop18h 11mUnited Airlines
lun. 11/1712:30 pmYYC - STL
1 stop9h 17mUnited Airlines
Deal found 7/10$402

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis to Canada 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 julio 11, 2025.
Use the filters below to find and compare flights from St. Louis to Canada that are best for you.

Fly from

St. Louis

Fly to

Canada

Route

Depart

Return

Price

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

sáb. 9/13

7:55 pm-2:45 pm

1 stop19h 50m

Calgary

dom. 9/21

8:55 am-9:06 am

1 stop23h 11m

$315

St. LouisCalgary

STL - YYC

STLYYC

Lambert-St Louis

vie. 9/12

6:10 am-11:19 pm

1 stop18h 09m

Calgary

mar. 9/16

6:29 am-8:32 pm

1 stop13h 03m

$327

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

jue. 9/25

6:05 am-5:47 pm

1 stop10h 42m

Toronto Pearson Intl

dom. 9/28

6:30 am-3:25 pm

1 stop9h 55m

$331

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

jue. 9/18

8:03 pm-11:45 am

1 stop14h 42m

Montreal Pierre Elliott Trudeau Intl

mar. 9/23

12:31 pm-8:32 pm

1 stop9h 01m

$334

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

mié. 8/6

11:24 am-10:44 pm

1 stop10h 20m

Toronto Pearson Intl

mié. 8/13

9:50 am-11:47 pm

1 stop14h 57m

$344

St. LouisVancouver

STL - YVR

STLYVR

Lambert-St Louis

jue. 8/7

2:36 pm-9:50 pm

2 stops33h 14m

Vancouver Intl

jue. 8/14

1:15 pm-1:32 pm

1 stop22h 17m

$352

St. LouisVancouver

STL - YVR

STLYVR

Lambert-St Louis

lun. 9/8

6:30 pm-12:27 pm

2 stops19h 57m

Vancouver Intl

lun. 9/15

7:07 pm-2:41 pm

2 stops17h 34m

$377

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

mar. 8/12

6:40 am-5:59 pm

2 stops10h 19m

Toronto Pearson Intl

mié. 8/20

10:20 am-6:05 pm

1 stop8h 45m

$390

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

sáb. 8/9

4:00 pm-7:00 pm

Nonstop2h 00m

Toronto Pearson Intl

dom. 8/17

2:15 pm-3:21 pm

Nonstop2h 06m

$391

St. LouisVancouver

STL - YVR

STLYVR

Lambert-St Louis

lun. 9/8

5:49 pm-11:22 pm

1 stop7h 33m

Vancouver Intl

lun. 9/15

11:00 am-8:46 pm

1 stop7h 46m

$396

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/9

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

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

Have a flexible travel schedule? Discover the best time to fly to Canada from St. Louis 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 St. Louis to Canada

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

Currently, January is the cheapest month in which you can book a flight from St. Louis to Canada (average of $243). Flying from St. Louis to Canada in July is currently the most expensive (average of $351). 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 STL to CA?

Find hourly flight availability from St. Louis to Canada. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 11, 2025.

When flying from St. Louis to Canada, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from St. Louis to Canada

Explore weekly flight availability from St. Louis to Canada. 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 julio 11, 2025.

The most flights from STL to CA0 are scheduled on a Monday (4 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).

Reviews of airlines servicing Canada

Get insights into the airlines that provide service to Canada. 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 Canada. Reviews last updated julio 11, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta, and United Airlines from St. Louis to Canada by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Delta
8.0
Very good
7,951 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
United Airlines
7.4
Good
8,846 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
WestJet
7.2
Good
2,924 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Canada. 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 from for flights from St. Louis to Canada?

    Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly out of when you book flights from St. Louis to Canada.

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

    One-way options have recently been found by users for as low as $137 on American Airlines. Other airlines that offer cheap prices include Air Canada from $171 and British Airways from $173 one-way.

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

    The most popular flight routes from St. Louis to Canada are Lambert-St Louis - Toronto Pearson Intl, Lambert-St Louis - Vancouver Intl and Lambert-St Louis - Montreal Pierre Elliott Trudeau Intl.

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

    No one likes to see their flight delayed. When booking a flight from St. Louis to Canada consider choosing United Airlines (75%), Air Canada (51%) or Jazz (35%) as they are the most reliable in getting you off to your destination on time.

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

    Looking at all options, your cheapest flight can be booked for $235. While the most popular route (Lambert-St Louis - Toronto Pearson Intl) can be booked for $339 on average our data indicates $1,546 when flying from St. Louis to Canada.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Canada 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 St. Louis to Canada?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Canada (average of $243). Flying from St. Louis to Canada in July is currently the most expensive (average of $351). 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

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 St. Louis to Canada

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Seattle flights
St. Louis to Las Vegas flights
St. Louis to Seattle flights
St. Louis to LaGuardia flights
St. Louis to Minneapolis flights
Kansas City to Los Angeles flights
St. Louis to Newark flights
Kansas City to Las Vegas flights
St. Louis to Miami flights
Kansas City to Boston flights
Kansas City to Denver flights
Kansas City to O'Hare Intl flights
Kansas City to Newark flights
St. Louis to John F Kennedy Intl flights
St. Louis to Denver flights
St. Louis to Orlando flights
Kansas City to LaGuardia flights
St. Louis to Boston flights
St. Louis to Atlanta flights
Kansas City to Hobby flights
Kansas City to San Francisco flights
Kansas City to San Diego flights
Kansas City to Miami flights
Kansas City to John F Kennedy Intl flights
Kansas City to Orlando flights
Kansas City to Cancún flights
St. Louis to Fort Lauderdale flights
Kansas City to Tampa flights
Kansas City to George Bush Intcntl flights
Kansas City to Atlanta flights
Kansas City to Minneapolis flights
St. Louis to Cancún flights
St. Louis to Dulles Intl flights
St. Louis to Hobby flights
St. Louis to Salt Lake City flights
St. Louis to Dallas/Fort Worth flights
Kansas City to Dulles Intl flights
St. Louis to Los Angeles flights
Kansas City to Salt Lake City flights
St. Louis to O'Hare Intl flights
Kansas City to Portland flights
Kansas City to Midway flights
Kansas City to Dallas/Fort Worth flights
Kansas City to Sky Harbor Intl flights
St. Louis to Honolulu flights
Springfield to O'Hare Intl flights
St. Louis to Sky Harbor Intl flights
Kansas City to Honolulu flights
St. Louis to George Bush Intcntl flights
St. Louis to San Francisco flights

Top 6 airlines flying from St. Louis to Canada

Discover the top 6 airlines that operate flights from St. Louis to Canada. 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 julio 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$165Average$599FlexibilityNo cancel feeOn-time67%
DeltaCheapest$168Average$604FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$175Average$582FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$214Average$639FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$360Average$561FlexibilityNo cancel feeOn-time75%
WestJetCheapest$405Average$586FlexibilityNo cancel feeOn-time60%

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.