Which airlines fly to St. Louis?

Based on our data, the most popular airlines that fly to St. Louis from Canada are Air Canada, United Airlines, WestJet and Delta. There may also be other airline options depending on where in Canada you’re flying from.

Delta Flights to St. Louis

There are 34 Delta flights to St. Louis in a normal week. The most common departure point is Atlanta Hartsfield-Jackson and the best Delta ticket price seen on momondo is C$ 367 (last 72 hours, from Vancouver Intl, to St. Louis). Delta has a score of 7.9 from 7,954 user reviews on momondo.

WestJet Flights to St. Louis

WestJet flights to St. Louis can start from as low as C$ 256 (round-trip, from Edmonton, found in the last 72 hours). Over 39 flights that WestJet operates to St. Louis in a normal week, prices can vary significantly. The most popular WestJet flight to St. Louis is from Atlanta Hartsfield-Jackson. WestJet has been rated 7.2/10 by momondo users, in 3,091 reviews.

How long does it take to fly to St. Louis?

Flight times vary depending on what airport in Canada you fly out of and what airport in St. Louis you fly into. For example, flying from Toronto Pearson Intl to Lambert-St Louis takes 2h 03m on average. On the other hand, flying from Vancouver Intl to Lambert-St Louis takes 7h 46m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo to see if there are any available for your route.

C$ 181 Cheap Flights to St. Louis in 2025/26

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Find the cheapest flights from Canada to St. Louis

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

1:29 p.m. - 8:09 a.m.YYC-STL

17h 40m1 stop

4:34 p.m. - 12:34 p.m.STL-YYC

21h 00m1 stop

C$ 361American Airlines

Find Deal

Fri, 10 Oct - Mon, 13 Oct

8:05 p.m. - 3:56 p.m.YYZ-STL

20h 51m1 stop

9:59 p.m. - 10:52 p.m.STL-YYZ

23h 53m2 stops

C$ 364

Find Deal

Fri, 17 Oct - Mon, 20 Oct

3:17 p.m. - 10:49 a.m.YEG-STL

18h 32m2 stops

5:00 a.m. - 4:25 p.m.STL-YEG

12h 25m1 stop

C$ 418United Airlines

Find Deal

Wed, 15 Oct - Wed, 22 Oct

7:36 p.m. - 9:46 a.m.YVR-STL

12h 10m2 stops

12:49 p.m. - 11:59 p.m.STL-YVR

13h 10m2 stops

C$ 473Delta

Find Deal

Sat, 15 Nov - Tue, 18 Nov

7:25 a.m. - 11:23 p.m.YVR-STL

13h 58m2 stops

7:47 p.m. - 10:49 a.m.STL-YVR

17h 02m2 stops

C$ 496Delta

Find Deal

Thu, 13 Nov - Mon, 17 Nov

10:30 a.m. - 2:25 p.m.YVR-STL

25h 55m1 stop

5:24 p.m. - 6:15 p.m.STL-YVR

26h 51m1 stop

C$ 514United Airlines

Find Deal

Fri, 14 Nov - Mon, 17 Nov

2:15 p.m. - 3:18 p.m.YYZ-STL

2h 03mdirect

4:05 p.m. - 7:06 p.m.STL-YYZ

2h 01mdirect

C$ 559Air Canada

Find Deal

Sat, 25 Oct - Sun, 2 Nov

3:00 p.m. - 7:57 p.m.YYZ-STL

5h 57m1 stop

9:15 a.m. - 12:11 p.m.STL-YYZ

1h 56mdirect

C$ 567Air Canada

Find Deal

Sat, 4 Oct - Mon, 6 Oct

9:25 a.m. - 11:09 p.m.YVR-STL

11h 44m2 stops

8:40 a.m. - 12:11 a.m.STL-YVR

17h 31m2 stops

C$ 617WestJet

Find Deal

Tue, 30 Sep - Sun, 5 Oct

6:00 a.m. - 11:09 p.m.YYC-STL

16h 09m2 stops

6:00 a.m. - 3:05 p.m.STL-YYC

10h 05m2 stops

C$ 631WestJet

Find Deal

Thu, 25 Sep - Sun, 28 Sep

Fly from

Route

Depart

Return

Price

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 10/10

1:29 p.m.-8:09 a.m.

1 stop17h 40m

Lambert-St Louis

Mon 13/10

4:34 p.m.-12:34 p.m.

1 stop21h 00m

C$ 361

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 17/10

8:05 p.m.-3:56 p.m.

1 stop20h 51m

Lambert-St Louis

Mon 20/10

9:59 p.m.-10:52 p.m.

2 stops23h 53m

C$ 364

EdmontonSt. Louis

YEG - STL

YEGSTL

Edmonton

Wed 15/10

3:17 p.m.-10:49 a.m.

2 stops18h 32m

Lambert-St Louis

Wed 22/10

5:00 a.m.-4:25 p.m.

1 stop12h 25m

C$ 418

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Sat 15/11

7:36 p.m.-9:46 a.m.

2 stops12h 10m

Lambert-St Louis

Tue 18/11

12:49 p.m.-11:59 p.m.

2 stops13h 10m

C$ 473

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Thu 13/11

7:25 a.m.-11:23 p.m.

2 stops13h 58m

Lambert-St Louis

Mon 17/11

7:47 p.m.-10:49 a.m.

2 stops17h 02m

C$ 496

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Fri 14/11

10:30 a.m.-2:25 p.m.

1 stop25h 55m

Lambert-St Louis

Mon 17/11

5:24 p.m.-6:15 p.m.

1 stop26h 51m

C$ 514

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 25/10

2:15 p.m.-3:18 p.m.

Nonstop2h 03m

Lambert-St Louis

Sun 2/11

4:05 p.m.-7:06 p.m.

Nonstop2h 01m

C$ 559

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 4/10

3:00 p.m.-7:57 p.m.

1 stop5h 57m

Lambert-St Louis

Mon 6/10

9:15 a.m.-12:11 p.m.

Nonstop1h 56m

C$ 567

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Tue 30/9

9:25 a.m.-11:09 p.m.

2 stops11h 44m

Lambert-St Louis

Sun 5/10

8:40 a.m.-12:11 a.m.

2 stops17h 31m

C$ 617

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 25/9

6:00 a.m.-11:09 p.m.

2 stops16h 09m

Lambert-St Louis

Sun 28/9

6:00 a.m.-3:05 p.m.

2 stops10h 05m

C$ 631

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

St. Louis flights insights and trends

Explore insights for your St. Louis flight to craft the best travel plan

Prices

Other information

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

The month of June is, on average, the cheapest month to fly to St. Louis from Canada, with most prices found around C$ 515. If you don’t want to visit St. Louis in June, then you should wait until August to fly from Canada, when ticket prices are also cheap, with an average price of C$ 550.

What is the absolute cheapest flight to St. Louis?

See prices from:

What is the cheapest day to depart on your flight to St. Louis?

Our data shows that Thursday is the least expensive day to fly to St. Louis. Tickets to fly out on this day can be as low as C$ 589. The most expensive day to fly to St. Louis is Monday, with ticket prices averaging around C$ 766.

What is the cheapest time of day to depart on your flight to St. Louis?

The cheapest time of day to fly to St. Louis is in the morning when flights can be purchased for as low as C$ 542. If you have a flexible travel schedule, then try to avoid flying at noon when prices are C$ 692 on average. Flights to St. Louis from Canada at noon are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

You are more likely to see cheaper flights to St. Louis from Canada when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around C$ 683 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Canada for as low as C$ 498 on momondo.

Cheapest flights to Lambert-St Louis

Find the cheapest flights to Lambert-St Louis from your nearest city or airport

Find Flights from Toronto Pearson Intl Airport to St. Louis

CHEAPEST MONTH TO FLY TO ST. LOUIS FROM TORONTO PEARSON INTL AIRPORT	June	20% cheaper	Flying from Toronto Pearson Intl Airport to St. Louis costs on average just C$ 551 in June
MOST EXPENSIVE MONTH TO FLY TO ST. LOUIS FROM TORONTO PEARSON INTL AIRPORT	February	9% more expensive	It costs about C$ 745 for flights to St. Louis from Toronto Pearson Intl Airport in February
MOST POPULAR MONTH TO FLY TO ST. LOUIS FROM TORONTO PEARSON INTL AIRPORT	December	320% more users visited	More momondo users searched in flights to St. Louis from Toronto Pearson Intl Airport in December than any other month

Cheap St. Louis flight deals and tips

Summary info about St. Louis flight prices, duration and airlines

Best One-Way Price	C$ 181
Best Round-Trip Price	C$ 361
Fastest flight time	11h 27m
Popular in	June

The best one-way flight price to St. Louis from Canada in the last 72 hours is C$ 181 (Calgary to Lambert-St Louis).

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The best round-trip flight price to St. Louis from Canada in the last 72 hours is C$ 361 (Calgary to Lambert-St Louis).

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The fastest flight to St. Louis from Canada takes 11h 27m (Calgary to Lambert-St Louis).

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June has the highest demand for flights to St. Louis, with a 7% price increase on average.

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Frequently asked questions about flying to St. Louis

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

The best time to book a flight to St. Louis from Canada is 65 days out, which is when prices tend to be around C$ 659. In the past 72 hours, momondo users found flights from Canada to St. Louis for as low as C$ 311.

Is there an alternative airport near St. Louis?

Belleville Airport, Marion Williamson County Airport or Springfield Capital Airport can be an alternative airport used for travel to St. Louis.

When did momondo last update prices for flights to Lambert-St Louis Airport?

Prices for flights to Lambert-St Louis Airport were last updated today.

How many operators does momondo search for flights to Lambert-St Louis Airport?

As of September 2025, there are 6 operators available to choose from for flights to Lambert-St Louis Airport.

How old do you have to be to fly to Lambert-St Louis Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Chesterfield

Collinsville

Litchfield

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Why should I use momondo to find a flight deal to St. Louis?

It is quick and easy to find flights to St. Louis on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.

Can I find flights to St. Louis with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to St. Louis with this policy.

How can momondo help me find flights to St. Louis?

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