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St. Louis

$157+ 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 8/14. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
May 4 — May 111
Sun 5/4
Sun 5/11
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 April 29, 2025.

Round-trip from

$338
(Delta)

One-way from

$157
(Kiwi.com)

Popular in

January

Cheapest in

November

Average price

$516

Good round-trip deal

$214 or less

Good one-way deal

$214 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. 4% potential increase in price ($21 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 29, 2025.

This Alaska Airlines deal was found by Cheapflights users on 4/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/171:48 pmYVR - STL
1 stop8h 11mAlaska Airlines
Tue 9/306:00 amSTL - YVR
1 stop8h 48mAlaska Airlines
Deal found 4/28$338
This Air Canada deal was found by Cheapflights users on 4/28. 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 9/1612:45 amYVR - STL
1 stop12h 33mAir Canada
Tue 9/301:30 pmSTL - YVR
1 stop8h 46mAir Canada
Deal found 4/28$354
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Fri 6/136:15 amYYC - STL
1 stop13h 48mUnited Airlines
Mon 6/235:27 pmSTL - YYC
1 stop6h 26mUnited Airlines
Deal found 4/29$358
This Kiwi.com deal was found by Cheapflights users on 4/27. 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.
Sat 5/106:30 amYYZ - STL
1 stop27h 45mMultiple Airlines
Mon 5/129:55 pmSTL - YYZ
1 stop25h 17mMultiple Airlines
Deal found 4/27$360
This American Airlines deal was found by Cheapflights users on 4/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/96:45 amYYC - STL
1 stop10h 46mAmerican Airlines
Mon 6/165:37 amSTL - YYC
1 stop7h 13mAmerican Airlines
Deal found 4/28$367
This Delta deal was found by Cheapflights users on 4/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/36:45 amYVR - STL
2 stops9h 59mDelta
Tue 7/87:15 amSTL - YVR
2 stops9h 30mDelta
Deal found 4/28$369
This TravelUp deal was found by Cheapflights users on 4/29. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/206:45 amYYC - STL
1 stop15h 34mBritish Airways
Mon 6/308:35 amSTL - YYC
1 stop15h 54mBritish Airways
Deal found 4/29$372
This United Airlines deal was found by Cheapflights users on 4/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/147:00 amYVR - STL
1 stop7h 52mUnited Airlines
Tue 5/205:20 amSTL - YVR
1 stop10h 16mUnited Airlines
Deal found 4/28$375
This Delta deal was found by Cheapflights users on 4/29. 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.
Fri 7/116:45 amYYC - STL
2 stops16h 08mDelta
Mon 7/212:23 pmSTL - YYC
1 stop9h 34mDelta
Deal found 4/29$384
This Kiwi.com deal was found by Cheapflights users on 4/27. 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.
Sun 8/1012:35 pmYVR - STL
2 stops18h 36mMultiple Airlines
Fri 8/152:27 pmSTL - YVR
1 stop11h 32mMultiple Airlines
Deal found 4/27$390
This FlightHub deal was found by Cheapflights users on 4/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/37:00 amYYC - STL
2 stops12h 39mWestJet
Wed 6/1110:30 amSTL - YYC
1 stop8h 58mWestJet
Deal found 4/29$394
This United Airlines deal was found by Cheapflights users on 4/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/2311:30 amYYZ - STL
Nonstop2h 06mUnited Airlines
Wed 6/257:30 amSTL - YYZ
Nonstop1h 55mUnited Airlines
Deal found 4/28$405

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 April 29, 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

Fri 6/13

6:15 am-9:03 pm

1 stop13h 48m

Lambert-St Louis

Mon 6/23

5:27 pm-10:53 pm

1 stop6h 26m

$358

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 5/10

6:30 am-9:15 am

1 stop27h 45m

Lambert-St Louis

Mon 5/12

9:55 pm-12:12 am

1 stop25h 17m

$360

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 6/9

6:45 am-6:31 pm

1 stop10h 46m

Lambert-St Louis

Mon 6/16

5:37 am-11:50 am

1 stop7h 13m

$367

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Thu 7/3

6:45 am-6:44 pm

2 stops9h 59m

Lambert-St Louis

Tue 7/8

7:15 am-2:45 pm

2 stops9h 30m

$369

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 6/20

6:45 am-11:19 pm

1 stop15h 34m

Lambert-St Louis

Mon 6/30

8:35 am-11:29 pm

1 stop15h 54m

$372

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Wed 5/14

7:00 am-4:52 pm

1 stop7h 52m

Lambert-St Louis

Tue 5/20

5:20 am-1:36 pm

1 stop10h 16m

$375

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 7/11

6:45 am-11:53 pm

2 stops16h 08m

Lambert-St Louis

Mon 7/21

2:23 pm-10:57 pm

1 stop9h 34m

$384

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Tue 6/3

7:00 am-8:39 pm

2 stops12h 39m

Lambert-St Louis

Wed 6/11

10:30 am-6:28 pm

1 stop8h 58m

$394

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 6/23

11:30 am-12:36 pm

Nonstop2h 06m

Lambert-St Louis

Wed 6/25

7:30 am-10:25 am

Nonstop1h 55m

$405

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 5/30

3:50 pm-9:15 am

1 stop18h 25m

Lambert-St Louis

Sun 6/1

5:45 pm-5:06 pm

1 stop22h 21m

$407

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

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 April 29, 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.

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 April 29, 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 United 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
9,961 reviews

Food

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

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
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Food

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

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
7,936 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Food

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

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
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Food

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

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
9,961 reviews

Food

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
WestJet
7.2
Good
2,826 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Food

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

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 $185 on Air Canada. Other airlines that offer cheap prices include Delta from $190 and American Airlines from $208 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 Vancouver 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 Air Canada (79%), Jazz (79%) or United Airlines (79%) 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 $199. While the most popular route (Toronto Pearson Intl - Lambert-St Louis) can be booked for $360 on average our data indicates $323 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
Fenton
Maryland Heights
Fairview Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Glencoe
Alton
Farmington
O'Fallon

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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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$285Average$571FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$294Average$499FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$309Average$516FlexibilityNo cancel feeOn-time71%
DeltaCheapest$452Average$511FlexibilityNo cancel feeOn-timeN/A

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