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St. Louis

$150+ 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 7/9. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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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 junio 12, 2025.

Round-trip from

$308
(Mytrip)

One-way from

$150
(Kiwi.com)

Popular in

August

Cheapest in

June

Average price

$390

Good round-trip deal

$324 or less

Good one-way deal

$188 or less
From Canada to Lambert-St Louis
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One-way flight from Canada to Lambert-St Louis
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Highest demand for flights based on searches. 5% potential increase in price ($29 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Canada to Lambert-St Louis.
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Price to beat on a one-way flight from Canada to Lambert-St Louis.
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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 junio 12, 2025.

This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/99:15 amYYC - STL
1 stop23h 37mMultiple Airlines
dom. 7/1310:47 amSTL - YYC
2 stops34h 13mMultiple Airlines
Deal found 6/10$308
This lol.travel deal was found by Cheapflights users on 6/11. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/38:35 amYVR - STL
1 stop13h 24mUnited Airlines
mié. 7/98:54 amSTL - YVR
1 stop11h 24mUnited Airlines
Deal found 6/11$327
This American Airlines deal was found by Cheapflights users on 6/11. 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. 9/2512:30 pmYUL - STL
1 stop8h 55mAmerican Airlines
lun. 9/295:55 amSTL - YUL
1 stop9h 35mAmerican Airlines
Deal found 6/11$333
This Mytrip deal was found by Cheapflights users on 6/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/226:30 amYYZ - STL
1 stop11h 01mMultiple Airlines
jue. 7/2410:47 amSTL - YYZ
2 stops33h 36mMultiple Airlines
Deal found 6/12$337
This American Airlines deal was found by Cheapflights users on 6/10. 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.
lun. 6/237:25 pmYYZ - STL
1 stop5h 34mAmerican Airlines
jue. 6/266:00 amSTL - YYZ
1 stop3h 59mAmerican Airlines
Deal found 6/10$339
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
vie. 7/2511:00 pmYVR - STL
1 stop12h 59mMultiple Airlines
lun. 7/289:50 amSTL - YVR
2 stops13h 19mMultiple Airlines
Deal found 6/9$340
This Booking.com deal was found by Cheapflights users on 6/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/2611:30 amYYZ - STL
Nonstop2h 06mAir Canada
dom. 6/291:30 pmSTL - YYZ
1 stop15h 55mAir Canada
Deal found 6/11$344
This Delta deal was found by Cheapflights users on 6/10. 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.
vie. 6/202:27 pmYYZ - STL
1 stop7h 26mDelta
dom. 6/227:00 amSTL - YYZ
1 stop9h 06mDelta
Deal found 6/10$361
This United Airlines deal was found by Cheapflights users on 6/12. 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. 10/69:00 amYYZ - STL
1 stop26h 49mUnited Airlines
jue. 10/912:25 pmSTL - YYZ
1 stop7h 37mUnited Airlines
Deal found 6/12$363
This Mytrip deal was found by Cheapflights users on 6/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/101:10 pmYUL - STL
2 stops21h 42mMultiple Airlines
jue. 7/1710:47 amSTL - YUL
3 stops26h 03mMultiple Airlines
Deal found 6/12$393
This Trip.com deal was found by Cheapflights users on 6/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/88:30 pmYVR - STL
2 stops11h 11mWestJet
mar. 7/156:30 amSTL - YVR
2 stops11h 36mWestJet
Deal found 6/10$415
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/218:45 pmYEG - STL
2 stops14h 36mMultiple Airlines
lun. 8/256:00 amSTL - YEG
1 stop11h 21mMultiple Airlines
Deal found 6/10$424

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 junio 12, 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

mié. 7/9

9:15 am-9:52 am

1 stop23h 37m

Lambert-St Louis

dom. 7/13

10:47 am-8:00 pm

2 stops34h 13m

$308

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

jue. 7/3

8:35 am-11:59 pm

1 stop13h 24m

Lambert-St Louis

mié. 7/9

8:54 am-6:18 pm

1 stop11h 24m

$327

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

jue. 9/25

12:30 pm-8:25 pm

1 stop8h 55m

Lambert-St Louis

lun. 9/29

5:55 am-4:30 pm

1 stop9h 35m

$333

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

mar. 7/22

6:30 am-4:31 pm

1 stop11h 01m

Lambert-St Louis

jue. 7/24

10:47 am-9:23 pm

2 stops33h 36m

$337

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

lun. 6/23

7:25 pm-11:59 pm

1 stop5h 34m

Lambert-St Louis

jue. 6/26

6:00 am-10:59 am

1 stop3h 59m

$339

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

vie. 7/25

11:00 pm-1:59 pm

1 stop12h 59m

Lambert-St Louis

lun. 7/28

9:50 am-9:09 pm

2 stops13h 19m

$340

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

jue. 6/26

11:30 am-12:36 pm

Nonstop2h 06m

Lambert-St Louis

dom. 6/29

1:30 pm-6:25 am

1 stop15h 55m

$344

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

jue. 6/26

10:20 am-3:17 pm

1 stop5h 57m

Lambert-St Louis

dom. 6/29

6:40 am-11:18 am

1 stop3h 38m

$361

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

lun. 10/6

9:00 am-10:49 am

1 stop26h 49m

Lambert-St Louis

jue. 10/9

12:25 pm-9:02 pm

1 stop7h 37m

$363

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

jue. 7/10

1:10 pm-9:52 am

2 stops21h 42m

Lambert-St Louis

jue. 7/17

10:47 am-1:50 pm

3 stops26h 03m

$393

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 60 results
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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 $311). Flying from Canada to St. Louis in March is currently the most expensive (average of $356). 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 junio 12, 2025.

When flying from Canada to St. Louis, 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 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 junio 12, 2025.

The most flights from CA0 to STL are scheduled on a Wednesday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 junio 12, 2025.
To help decide which airline to fly from Canada to St. Louis, see what other customers have to say about Alaska Airlines, Delta and Hawaiian Airlines. 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
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • 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 $188 on American Airlines. Other airlines that offer cheap prices include Air Canada from $188 and Delta from $196 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 Halifax Intl - 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 Jazz (83%), Air Canada (77%) or United Airlines (50%) 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 $187. While the most popular route (Toronto Pearson Intl - Lambert-St Louis) can be booked for $330 on average our data indicates $379 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 $311). Flying from Canada to St. Louis in March is currently the most expensive (average of $356). 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 Canada?

Book flights to Canada if you plan to visit one of these locations
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Festus
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 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$294Average$499FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$309Average$516FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$324Average$509FlexibilityNo cancel feeOn-time67%
DeltaCheapest$452Average$511FlexibilityNo cancel feeOn-timeN/A

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