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Cheap flights from Canada to St. Louis from C$ 217

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 14/8. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
5 May — 12 May1
1 adult

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 30 April 2025.

Round-trip from

C$ 466

One-way from

C$ 217

Popular in

January

Cheapest in

November

Average price

C$ 714

Good round-trip deal

C$ 544 or less

Good one-way deal

C$ 294 or less
American Airlines
  • American Airlines
  • 9/6-16/6
  • 2 total stops
  • 21h 15m total
  • Canada to St. Louis
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14/8
  • 14/8
  • 2 total stops
  • 22h 40m total
  • Canada to St. Louis
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Highest demand for flights based on searches. 4% potential increase in price (C$ 40 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 10 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 30 April 2025.

Mon 9/66:45 a.m.YYC - STL
1 stop13h 09mAmerican Airlines
Mon 16/64:23 p.m.STL - YYC
1 stop8h 06mAmerican Airlines
Deal found 27/4C$ 466
Fri 13/66:15 a.m.YYC - STL
1 stop13h 48mUnited Airlines
Mon 23/65:27 p.m.STL - YYC
1 stop6h 26mUnited Airlines
Deal found 29/4C$ 496
Sat 10/56:30 a.m.YYZ - STL
1 stop27h 45mMultiple Airlines
Mon 12/59:55 p.m.STL - YYZ
1 stop25h 17mMultiple Airlines
Deal found 27/4C$ 498
Sun 8/612:30 a.m.YYC - STL
1 stop11h 05mWestJet
Mon 16/68:49 a.m.STL - YYC
1 stop13h 08mWestJet
Deal found 27/4C$ 508
Thu 3/76:45 a.m.YVR - STL
2 stops9h 59mDelta
Tue 8/77:15 a.m.STL - YVR
2 stops9h 30mDelta
Deal found 28/4C$ 511
Fri 20/66:45 a.m.YYC - STL
1 stop15h 34mBritish Airways
Mon 30/68:35 a.m.STL - YYC
1 stop15h 54mBritish Airways
Deal found 29/4C$ 515
Wed 14/57:00 a.m.YVR - STL
1 stop7h 52mUnited Airlines
Tue 20/55:20 a.m.STL - YVR
1 stop10h 16mUnited Airlines
Deal found 29/4C$ 519
Mon 26/57:00 a.m.YYC - STL
2 stops9h 00mDelta
Mon 2/67:30 a.m.STL - YYC
2 stops10h 26mDelta
Deal found 27/4C$ 523
Mon 23/611:30 a.m.YYZ - STL
Nonstop2h 06mUnited Airlines
Wed 25/67:30 a.m.STL - YYZ
Nonstop1h 55mUnited Airlines
Deal found 28/4C$ 561
Fri 30/53:50 p.m.YOW - STL
1 stop18h 25mMultiple Airlines
Sun 1/65:45 p.m.STL - YOW
1 stop22h 21mMultiple Airlines
Deal found 29/4C$ 563
Fri 30/59:49 a.m.YYZ - STL
1 stop4h 30mDelta
Sun 1/66:00 a.m.STL - YYZ
1 stop6h 40mDelta
Deal found 28/4C$ 568
Thu 22/511:30 a.m.YYZ - STL
Nonstop2h 06mAir Canada
Sun 25/52:30 p.m.STL - YYZ
Nonstop2h 00mAir Canada
Deal found 29/4C$ 577

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 629,999 searches. Data last updated 30 April 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 9/6

6:45 a.m.-8:54 p.m.

1 stop13h 09m

Lambert-St Louis

Mon 16/6

4:23 p.m.-11:29 p.m.

1 stop8h 06m

C$ 466

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 13/6

6:45 a.m.-4:53 p.m.

1 stop9h 08m

Lambert-St Louis

Mon 23/6

9:28 a.m.-8:57 p.m.

2 stops12h 29m

C$ 496

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 10/5

6:30 a.m.-9:15 a.m.

1 stop27h 45m

Lambert-St Louis

Mon 12/5

9:55 p.m.-12:12 a.m.

1 stop25h 17m

C$ 498

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 8/6

12:30 a.m.-12:35 p.m.

1 stop11h 05m

Lambert-St Louis

Mon 16/6

8:49 a.m.-8:57 p.m.

1 stop13h 08m

C$ 508

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Thu 3/7

12:30 p.m.-9:50 p.m.

1 stop7h 20m

Lambert-St Louis

Tue 8/7

5:31 p.m.-10:18 p.m.

1 stop6h 47m

C$ 511

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 20/6

6:45 a.m.-11:19 p.m.

1 stop15h 34m

Lambert-St Louis

Mon 30/6

8:35 a.m.-11:29 p.m.

1 stop15h 54m

C$ 515

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 23/6

11:30 a.m.-12:36 p.m.

Nonstop2h 06m

Lambert-St Louis

Wed 25/6

7:30 a.m.-10:25 a.m.

Nonstop1h 55m

C$ 561

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 30/5

3:50 p.m.-9:15 a.m.

1 stop18h 25m

Lambert-St Louis

Sun 1/6

5:45 p.m.-5:06 p.m.

1 stop22h 21m

C$ 563

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 30/5

9:49 a.m.-1:19 p.m.

1 stop4h 30m

Lambert-St Louis

Sun 1/6

6:00 a.m.-1:40 p.m.

1 stop6h 40m

C$ 568

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 22/5

11:30 a.m.-12:36 p.m.

Nonstop2h 06m

Lambert-St Louis

Sun 25/5

2:30 p.m.-5:30 p.m.

Nonstop2h 00m

C$ 577

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

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, January is the cheapest month in which you can book a flight from Canada to St. Louis (average of C$ 365). Flying from Canada to St. Louis in September is currently the most expensive (average of C$ 491). 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 30 April 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 56.0 - 119.0 mm per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Louis when rainfall is around 56.0 mm.

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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

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 30 April 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta and United Airlines from Canada to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

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
9,968 reviews
Alaska Airlines
8.0
Very good
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

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
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

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
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

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
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

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
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

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?

    Lambert-St Louis (STL) is the airport you will fly into if you book a flight from Canada to St. Louis. It is only a 20.4 km journey from Lambert-St Louis (STL) to St. Louis’s city centre.

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

    To fly one-way, consider booking your trip with Air Canada, which is currently one of the cheapest options available, starting at C$ 280. Delta flights start at C$ 281 while deals on American Airlines start at C$ 282 one-way.

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

    While some choose either Montreal Pierre Elliott Trudeau Intl - Lambert-St Louis or Edmonton - Lambert-St Louis, Toronto Pearson Intl - Lambert-St Louis is the most popular route from Canada to St. Louis.

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

    Before booking your flight to St. Louis from Canada, check out the most reliable airlines to get you to your destination on time: Air Canada (79%), Jazz (79%), United Airlines( 79%).

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

    On average you can expect to pay C$ 441 for a flight from Canada to St. Louis. The cheapest flight overall is C$ 294 while the most popular route, (Toronto Pearson Intl - Lambert-St Louis) is currently priced at C$ 504.

  • 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, January is the cheapest month in which you can book a flight from Canada to St. Louis (average of C$ 365). Flying from Canada to St. Louis in September is currently the most expensive (average of C$ 491). 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

Travelling to a place near Canada?

Book flights to Canada if you plan to visit one of these locations
Chesterfield
St. Peters

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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 629,999 searches. Data last updated 30 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 250AverageC$ 719FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 256AverageC$ 732FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 366AverageC$ 745FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapestC$ 367AverageC$ 436FlexibilityNo cancel feeOn-timeN/A
Search Delta flights

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How does Cheapflights help users find flights from Canada to St. Louis?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Canada to St. Louis. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Canada to St. Louis?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Canada to St. Louis for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Canada to St. Louis with no change fees?

Yes! Cheapflights helps users easily find flights from Canada to St. Louis with no change fees.

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