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Cheap flights from Canada to St. Louis from C$ 205

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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
17 Jun — 24 Jun1
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 12 June 2025.

Round-trip from

C$ 421

One-way from

C$ 205

Popular in

August

Cheapest in

June

Average price

C$ 533

Good round-trip deal

C$ 468 or less

Good one-way deal

C$ 490 or less
9/7-13/7
  • 9/7-13/7
  • 3 total stops
  • 57h 50m total
  • Canada to St. Louis
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9/7
  • 9/7
  • 1 total stop
  • 20h 37m total
  • Canada to St. Louis
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Highest demand for flights based on searches. 5% potential increase in price (C$ 54 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 15 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 12 June 2025.

Wed 9/79:15 a.m.YYC - STL
1 stop23h 37mMultiple Airlines
Sun 13/710:47 a.m.STL - YYC
2 stops34h 13mMultiple Airlines
Deal found 10/6C$ 421
Thu 4/95:00 a.m.YVR - STL
2 stops24h 49mMultiple Airlines
Thu 11/98:44 a.m.STL - YVR
2 stops31h 46mMultiple Airlines
Deal found 12/6C$ 443
Thu 3/78:35 a.m.YVR - STL
1 stop13h 24mUnited Airlines
Wed 9/78:54 a.m.STL - YVR
1 stop11h 24mUnited Airlines
Deal found 11/6C$ 447
Thu 25/912:30 p.m.YUL - STL
1 stop8h 55mAmerican Airlines
Mon 29/95:55 a.m.STL - YUL
1 stop9h 35mAmerican Airlines
Deal found 11/6C$ 455
Tue 22/76:30 a.m.YYZ - STL
1 stop11h 01mMultiple Airlines
Thu 24/710:47 a.m.STL - YYZ
2 stops33h 36mMultiple Airlines
Deal found 12/6C$ 461
Mon 23/67:25 p.m.YYZ - STL
1 stop5h 34mAmerican Airlines
Thu 26/66:00 a.m.STL - YYZ
1 stop3h 59mAmerican Airlines
Deal found 10/6C$ 463
Thu 26/611:30 a.m.YYZ - STL
Nonstop2h 06mAir Canada
Sun 29/61:30 p.m.STL - YYZ
1 stop15h 55mAir Canada
Deal found 11/6C$ 470
Fri 20/62:27 p.m.YYZ - STL
1 stop7h 26mDelta
Sun 22/67:00 a.m.STL - YYZ
1 stop9h 06mDelta
Deal found 10/6C$ 494
Mon 6/109:00 a.m.YYZ - STL
1 stop26h 49mUnited Airlines
Thu 9/1012:25 p.m.STL - YYZ
1 stop7h 37mUnited Airlines
Deal found 12/6C$ 496
Thu 10/71:10 p.m.YUL - STL
2 stops21h 42mMultiple Airlines
Thu 17/710:47 a.m.STL - YUL
3 stops26h 03mMultiple Airlines
Deal found 12/6C$ 537
Tue 8/78:30 p.m.YVR - STL
2 stops11h 11mWestJet
Tue 15/76:30 a.m.STL - YVR
2 stops11h 36mWestJet
Deal found 10/6C$ 567
Thu 21/88:45 p.m.YEG - STL
2 stops14h 36mMultiple Airlines
Mon 25/86:00 a.m.STL - YEG
1 stop11h 21mMultiple Airlines
Deal found 10/6C$ 580

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 12 June 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

Wed 9/7

9:15 a.m.-9:52 a.m.

1 stop23h 37m

Lambert-St Louis

Sun 13/7

10:47 a.m.-8:00 p.m.

2 stops34h 13m

C$ 421

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Thu 4/9

5:00 a.m.-7:49 a.m.

2 stops24h 49m

Lambert-St Louis

Thu 11/9

8:44 a.m.-2:30 p.m.

2 stops31h 46m

C$ 443

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Thu 3/7

8:35 a.m.-11:59 p.m.

1 stop13h 24m

Lambert-St Louis

Wed 9/7

8:54 a.m.-6:18 p.m.

1 stop11h 24m

C$ 447

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 25/9

12:30 p.m.-8:25 p.m.

1 stop8h 55m

Lambert-St Louis

Mon 29/9

5:55 a.m.-4:30 p.m.

1 stop9h 35m

C$ 455

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 22/7

6:30 a.m.-4:31 p.m.

1 stop11h 01m

Lambert-St Louis

Thu 24/7

10:47 a.m.-9:23 p.m.

2 stops33h 36m

C$ 461

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 23/6

7:25 p.m.-11:59 p.m.

1 stop5h 34m

Lambert-St Louis

Thu 26/6

6:00 a.m.-10:59 a.m.

1 stop3h 59m

C$ 463

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 26/6

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

Nonstop2h 06m

Lambert-St Louis

Sun 29/6

1:30 p.m.-6:25 a.m.

1 stop15h 55m

C$ 470

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 26/6

10:20 a.m.-3:17 p.m.

1 stop5h 57m

Lambert-St Louis

Sun 29/6

6:40 a.m.-11:18 a.m.

1 stop3h 38m

C$ 494

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 26/6

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

Nonstop2h 06m

Lambert-St Louis

Sun 29/6

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

Nonstop1h 55m

C$ 498

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 10/7

1:10 p.m.-9:52 a.m.

2 stops21h 42m

Lambert-St Louis

Thu 17/7

10:47 a.m.-1:50 p.m.

3 stops26h 03m

C$ 537

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/6

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 12 June 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 12 June 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 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 12 June 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta and Hawaiian 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
10,000 reviews
Check prices

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

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
Check prices

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

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
Check prices

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

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
Check prices

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

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
Check prices

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

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
Check prices

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

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?

    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 American Airlines, which is currently one of the cheapest options available, starting at C$ 257. Air Canada flights start at C$ 257 while deals on Delta start at C$ 268 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 Halifax Intl - 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: Jazz (83%), Air Canada (77%), United Airlines( 50%).

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

    On average you can expect to pay C$ 656 for a flight from Canada to St. Louis. The cheapest flight overall is C$ 331 while the most popular route, (Toronto Pearson Intl - Lambert-St Louis) is currently priced at C$ 451.

  • 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.
Pearson Intl to St. Louis flights
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Edmonton to Columbia flights

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 12 June 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 326AverageC$ 714FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 337AverageC$ 725FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 362AverageC$ 741FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapestC$ 362AverageC$ 416FlexibilityNo cancel feeOn-timeN/A
Search Delta flights

Fly with Cheapflights

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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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