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$ 249. Delta flights start at C$ 255 while deals on Iberia start at C$ 273 one-way.

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.

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).

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

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

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

On average you can expect to pay C$ 629 for a flight from Canada to St. Louis. The cheapest flight overall is C$ 303 while the most popular route, (Toronto Pearson Intl - Lambert-St Louis) is currently priced at C$ 475.

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 (82%), Air Canada (81%), United Airlines( 72%).

What are the most popular airlines that fly from Canada to St. Louis?

Before booking your flight from Canada to St. Louis check out the most popular airlines for this route: Air Canada, Delta or United Airlines.

How far in advance should I book a flight from Canada to St. Louis?

Find a great deal and save up to 224% by booking at least 47 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Canada to St. Louis within the next two weeks, with the cheapest ticket starting at C$ 476.

What is the cheapest month to fly from Canada to St. Louis?

The best pricing can be found in the month of June. Prices to St. Louis from Canada average C$ 677. You can even find prices in June for less than C$ 677, as users have found deals to St. Louis from as low as C$ 412. The month of August appears to be one of the more expensive times to travel to St. Louis from Canada. Flying in the targeted month can save you up to 16%.

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.

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.

C$ 239+ Flights from Canada to St. Louis

Cheap flight deals from Canada to St. Louis

Round-trip from	C$ 389
One-way from	C$ 239
Popular in	August
Cheapest in	June
Average price	C$ 792
Good round-trip deal	C$ 537 or less
Good one-way deal	C$ 486 or less

14/9-21/9
2 total stops
43h 01m total
Canada to St. Louis

Search Deals

9/9
2 total stops
26h 06m total
Canada to St. Louis

Search Deals

Highest demand for flights based on searches. 4% potential increase in price (C$ 46 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (C$ 16 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 2025

Search Deals

Price to beat on a round-trip flight from Canada to Lambert-St Louis.

Search Deals

Price to beat on a one-way flight from Canada to Lambert-St Louis.

Search Deals

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 1 sierpnia 2025.

ndz. 14/98:55 a.m.YYC - STL

1 stop23h 11mMultiple Airlines

ndz. 21/97:55 p.m.STL - YYC

1 stop19h 50mMultiple Airlines

Deal found 31/7C$ 389

czw. 28/811:00 p.m.YVR - STL

1 stop11h 56mMultiple Airlines

śr. 10/97:55 p.m.STL - YVR

2 stops22h 41mMultiple Airlines

Deal found 29/7C$ 428

pt. 5/96:29 a.m.YYC - STL

1 stop28h 01mAmerican Airlines

sob. 13/96:10 a.m.STL - YYC

1 stop18h 09mAmerican Airlines

Deal found 30/7C$ 443

sob. 8/114:44 p.m.YYZ - STL

1 stop8h 12mAmerican Airlines

sob. 15/116:00 a.m.STL - YYZ

1 stop9h 04mAmerican Airlines

Deal found 29/7C$ 444

czw. 28/86:00 a.m.YVR - STL

1 stop10h 29mAmerican Airlines

śr. 10/95:18 a.m.STL - YVR

1 stop7h 27mAmerican Airlines

Deal found 29/7C$ 447

sob. 13/912:31 p.m.YUL - STL

1 stop10h 22mAmerican Airlines

sob. 20/92:01 p.m.STL - YUL

1 stop20h 45mAmerican Airlines

Deal found 30/7C$ 451

sob. 13/97:00 a.m.YVR - STL

1 stop7h 53mUnited Airlines

sob. 20/95:30 p.m.STL - YVR

1 stop6h 48mUnited Airlines

Deal found 30/7C$ 458

wt. 9/95:17 p.m.YEG - STL

1 stop23h 17mAlaska Airlines

wt. 30/93:35 p.m.STL - YEG

1 stop20h 14mAlaska Airlines

Deal found 31/7C$ 477

wt. 9/93:17 p.m.YEG - STL

2 stops23h 27mUnited Airlines

sob. 27/95:28 p.m.STL - YEG

2 stops21h 40mUnited Airlines

Deal found 31/7C$ 483

śr. 13/812:09 p.m.YVR - STL

1 stop9h 13mDelta

pon. 18/86:00 a.m.STL - YVR

1 stop6h 59mDelta

Deal found 29/7C$ 487

pt. 12/912:25 a.m.YVR - STL

1 stop12h 53mAir Canada

sob. 20/94:05 p.m.STL - YVR

1 stop9h 14mAir Canada

Deal found 30/7C$ 490

ndz. 14/96:00 a.m.YXE - STL

2 stops26h 06mMultiple Airlines

ndz. 21/97:34 a.m.STL - YXE

1 stop14h 50mMultiple Airlines

Deal found 31/7C$ 495

Best flights from Canada to St. Louis
Discover carefully curated flight deals from Canada to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 1 sierpnia 2025.

ndz. 14/98:55 a.m.YYC - STL

1 stop23h 11mMultiple Airlines

ndz. 21/97:55 p.m.STL - YYC

1 stop19h 50mMultiple Airlines

Deal found 31/7C$ 389

pt. 5/96:29 a.m.YYC - STL

1 stop28h 01mAmerican Airlines

sob. 13/96:10 a.m.STL - YYC

1 stop18h 09mAmerican Airlines

Deal found 30/7C$ 443

sob. 13/97:00 a.m.YVR - STL

1 stop7h 53mUnited Airlines

sob. 20/95:15 a.m.STL - YVR

2 stops12h 39mUnited Airlines

Deal found 30/7C$ 458

wt. 9/95:17 p.m.YEG - STL

1 stop23h 17mAlaska Airlines

wt. 30/93:35 p.m.STL - YEG

1 stop20h 14mAlaska Airlines

Deal found 31/7C$ 477

śr. 13/812:09 p.m.YVR - STL

1 stop9h 13mDelta

pon. 18/86:00 a.m.STL - YVR

1 stop6h 59mDelta

Deal found 29/7C$ 487

pt. 12/912:25 a.m.YVR - STL

1 stop12h 53mAir Canada

sob. 20/94:05 p.m.STL - YVR

1 stop9h 14mAir Canada

Deal found 30/7C$ 490

pon. 18/811:55 p.m.YVR - STL

1 stop16h 35mBritish Airways

śr. 20/810:08 a.m.STL - YVR

1 stop13h 07mBritish Airways

Deal found 30/7C$ 572

śr. 13/88:30 p.m.YVR - STL

2 stops11h 27mWestJet

pon. 18/86:00 a.m.STL - YVR

2 stops15h 35mWestJet

Deal found 30/7C$ 617

czw. 28/811:00 p.m.YVR - STL

1 stop11h 56mMultiple Airlines

śr. 10/97:55 p.m.STL - YVR

2 stops22h 41mMultiple Airlines

Deal found 29/7C$ 428

czw. 28/86:00 a.m.YVR - STL

1 stop10h 29mAmerican Airlines

śr. 10/95:18 a.m.STL - YVR

1 stop7h 27mAmerican Airlines

Deal found 29/7C$ 447

wt. 9/93:17 p.m.YEG - STL

2 stops22h 02mUnited Airlines

wt. 30/93:23 p.m.STL - YEG

1 stop26h 02mUnited Airlines

Deal found 31/7C$ 483

wt. 21/101:15 p.m.YYZ - STL

1 stop8h 11mAmerican Airlines

pon. 27/107:16 a.m.STL - YYZ

1 stop9h 24mAmerican Airlines

Deal found 31/7C$ 450

Direct flights from Canada to St. Louis
Explore direct flight options from Canada to St. Louis based on user searches, and compare prices and availability for your desired travel dates. Data last updated 1 sierpnia 2025.

sob. 8/112:00 p.m.YYZ - STL

Nonstop2h 29mAir Canada

sob. 15/114:05 p.m.STL - YYZ

Nonstop2h 01mAir Canada

Deal found 29/7C$ 511

pon. 8/96:10 p.m.YUL - STL

Nonstop2h 47mAir Canada

wt. 16/91:30 p.m.STL - YUL

Nonstop2h 30mAir Canada

Deal found 29/7C$ 685

śr. 27/86:10 p.m.YUL - STL

Nonstop2h 50mUnited Airlines

śr. 3/91:30 p.m.STL - YUL

Nonstop2h 30mUnited Airlines

Deal found 30/7C$ 913

pon. 11/86:35 p.m.YYZ - STL

Nonstop2h 10mUnited Airlines

sob. 23/84:00 p.m.STL - YYZ

Nonstop2h 00mUnited Airlines

Deal found 31/7C$ 1,041

Last-minute flights from Canada to St. Louis
Discover last-minute flight deals from Canada to St. Louis. Data last updated 1 sierpnia 2025 and is based on user searches.

śr. 6/810:00 a.m.YYZ - STL

1 stop9h 08mDelta

wt. 12/86:00 a.m.STL - YYZ

1 stop9h 10mDelta

Deal found 30/7C$ 873

czw. 7/86:35 p.m.YUL - STL

2 stops16h 17mMultiple Airlines

czw. 14/82:30 p.m.STL - YUL

3 stops21h 00mMultiple Airlines

Deal found 30/7C$ 999

czw. 7/812:55 a.m.YEG - STL

1 stop17h 50mAir Canada

ndz. 17/84:00 p.m.STL - YEG

1 stop17h 25mAir Canada

Deal found 31/7C$ 1,070

czw. 7/89:25 a.m.YEG - STL

2 stops13h 28mDelta

ndz. 10/811:18 a.m.STL - YEG

1 stop5h 40mDelta

Deal found 30/7C$ 1,092

pt. 8/87:40 a.m.YYZ - STL

2 stops27h 00mMultiple Airlines

śr. 13/85:40 p.m.STL - YYZ

1 stop29h 07mMultiple Airlines

Deal found 30/7C$ 711

pt. 8/86:35 p.m.YYZ - STL

Nonstop2h 10mAir Canada

śr. 13/89:15 a.m.STL - YYZ

Nonstop2h 00mAir Canada

Deal found 30/7C$ 865

pt. 8/83:17 p.m.YEG - STL

1 stop7h 42mUnited Airlines

ndz. 17/89:09 a.m.STL - YEG

1 stop8h 16mUnited Airlines

Deal found 31/7C$ 959

pt. 8/812:00 p.m.YEG - STL

2 stops10h 20mWestJet

ndz. 17/86:40 a.m.STL - YEG

2 stops15h 32mWestJet

Deal found 31/7C$ 967

pt. 8/89:45 a.m.YYZ - STL

1 stop4h 36mWestJet

śr. 13/85:11 p.m.STL - YYZ

1 stop5h 48mWestJet

Deal found 30/7C$ 1,009

ndz. 10/89:00 a.m.YVR - STL

2 stops12h 53mWestJet

wt. 12/85:11 p.m.STL - YVR

2 stops22h 24mWestJet

Deal found 30/7C$ 667

pon. 11/83:18 p.m.YQB - STL

1 stop8h 27mUnited Airlines

czw. 14/85:00 a.m.STL - YQB

2 stops10h 00mUnited Airlines

Deal found 30/7C$ 1,030

pon. 11/810:15 p.m.YQB - STL

2 stops19h 16mMultiple Airlines

czw. 14/82:30 p.m.STL - YQB

3 stops24h 25mMultiple Airlines

Deal found 30/7C$ 1,092

One-way flights from Canada to St. Louis
Search for one-way flight options from Canada to St. Louis. Find affordable one-way fares based on user searches. Data last updated 1 sierpnia 2025.

wt. 9/95:00 a.m.YVR - STL

2 stops26h 06mMultiple Airlines

Deal found 31/7C$ 239

sob. 25/106:30 a.m.YYZ - STL

1 stop12h 25mMultiple Airlines

Deal found 30/7C$ 241

śr. 17/96:29 a.m.YYC - STL

1 stop13h 03mAmerican Airlines

Deal found 30/7C$ 249

sob. 13/96:15 a.m.YEG - STL

2 stops31h 49mMultiple Airlines

Deal found 29/7C$ 252

śr. 27/85:50 p.m.YVR - STL

2 stops12h 46mDelta

Deal found 31/7C$ 255

śr. 27/86:00 a.m.YVR - STL

1 stop10h 30mAmerican Airlines

Deal found 30/7C$ 260

śr. 3/96:30 a.m.YYZ - STL

1 stop15h 02mAmerican Airlines

Deal found 30/7C$ 263

pt. 19/95:15 p.m.YUL - STL

1 stop17h 11mAmerican Airlines

Deal found 30/7C$ 267

sob. 13/912:31 p.m.YUL - STL

1 stop9h 01mIberia

Deal found 30/7C$ 273

sob. 13/97:00 a.m.YYC - STL

2 stops31h 04mMultiple Airlines

Deal found 30/7C$ 282

pt. 19/98:50 a.m.YVR - STL

1 stop9h 07mAir Canada

Deal found 30/7C$ 282

sob. 13/96:45 a.m.YUL - STL

2 stops29h 05mMultiple Airlines

Deal found 30/7C$ 306

Fly from

Fly to

Route

Depart

Return

Price

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

ndz. 14/9

8:55 a.m.-9:06 a.m.

1 stop23h 11m

Lambert-St Louis

ndz. 21/9

7:55 p.m.-2:45 p.m.

1 stop19h 50m

C$ 389

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

czw. 28/8

11:00 p.m.-12:56 p.m.

1 stop11h 56m

Lambert-St Louis

śr. 10/9

7:55 p.m.-4:36 p.m.

2 stops22h 41m

C$ 428

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

pt. 5/9

6:29 a.m.-11:30 a.m.

1 stop28h 01m

Lambert-St Louis

sob. 13/9

6:10 a.m.-11:19 p.m.

1 stop18h 09m

C$ 443

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

czw. 28/8

6:00 a.m.-6:29 p.m.

1 stop10h 29m

Lambert-St Louis

śr. 10/9

5:18 a.m.-10:45 a.m.

1 stop7h 27m

C$ 447

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

wt. 21/10

1:15 p.m.-8:26 p.m.

1 stop8h 11m

Lambert-St Louis

pon. 27/10

7:16 a.m.-5:40 p.m.

1 stop9h 24m

C$ 450

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

sob. 13/9

12:31 p.m.-9:53 p.m.

1 stop10h 22m

Lambert-St Louis

sob. 20/9

2:01 p.m.-11:46 a.m.

1 stop20h 45m

C$ 451

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

sob. 13/9

7:00 a.m.-4:53 p.m.

1 stop7h 53m

Lambert-St Louis

sob. 20/9

5:15 a.m.-3:54 p.m.

2 stops12h 39m

C$ 458

EdmontonSt. Louis

YEG - STL

YEGSTL

Edmonton

wt. 9/9

5:17 p.m.-5:34 p.m.

1 stop23h 17m

Lambert-St Louis

wt. 30/9

3:35 p.m.-10:49 a.m.

1 stop20h 14m

C$ 477

EdmontonSt. Louis

YEG - STL

YEGSTL

Edmonton

wt. 9/9

3:17 p.m.-2:19 p.m.

2 stops22h 02m

Lambert-St Louis

wt. 30/9

3:23 p.m.-4:25 p.m.

1 stop26h 02m

C$ 483

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

śr. 13/8

12:09 p.m.-11:22 p.m.

1 stop9h 13m

Lambert-St Louis

pon. 18/8

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

1 stop6h 59m

C$ 487

Flights are sorted by cheapest round-trip flights first.

Deals found on 31/7

Showing 1-10 of 60 results

...

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?

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

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 (2 on average).

Reviews of airlines servicing St. Louis

Read through reviews of airlines operating flights from Canada to St. Louis, such as Alaska Airlines,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

10,000 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave

Alaska Airlines

8.0

Very good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave

Delta

8.0

Very good

7,981 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave

United Airlines

7.4

Good

8,900 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave

WestJet

7.2

Good

2,978 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave

Related info for your journey

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$ 249. Delta flights start at C$ 255 while deals on Iberia start at C$ 273 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 Vancouver 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 (82%), Air Canada (81%), United Airlines( 72%).
What are the cheapest flights from Canada to St. Louis?
On average you can expect to pay C$ 629 for a flight from Canada to St. Louis. The cheapest flight overall is C$ 303 while the most popular route, (Toronto Pearson Intl - Lambert-St Louis) is currently priced at C$ 475.
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

Chesterfield

St. Peters

Browse thousands of different options on Cheapflights for your next trip

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Complete your trip

St. Louis car rentals

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Top 4 airlines flying from Canada to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
WestJet	CheapestC$ 256	AverageC$ 751	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
Air Canada	CheapestC$ 330	AverageC$ 715	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	CheapestC$ 366	AverageC$ 746	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Delta	CheapestC$ 367	AverageC$ 480	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights

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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.

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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.

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

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Cheap flights from Canada to St. Louis from C$ 239

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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.

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 1 sierpnia 2025.

Round-trip from

One-way from

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Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Canada to St. Louis

Cheapest flights from Canada to St. LouisExplore 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 1 sierpnia 2025.

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 1 sierpnia 2025.

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Use the filters below to find and compare flights from Canada to St. Louis that are best for you.

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.

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?

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 1 sierpnia 2025.

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 1 sierpnia 2025.

Reviews of airlines servicing St. Louis

Read through reviews of airlines operating flights from Canada to St. Louis, such as Alaska Airlines,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

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?

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

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

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

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

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

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

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

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

Travelling to a place near St. Louis?

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Alternative routes for Canada to St. Louis

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Top 4 airlines flying from Canada to St. Louis

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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 1 sierpnia 2025.