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Cheap flights from Canada to St. Louis from $173

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Canada to St. Louis departing on 9/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Canada to St. Louis

Recent round-trip flight deals from Canada to St. Louis

Logo
8:55 am - 9:06 amYYC-STL
23h 11m1 stop
Logo
7:55 pm - 2:45 pmSTL-YYC
19h 50m1 stop
$281
Find Deal
Sun, Sep 14 - Sun, Sep 21
Logo
8:55 am - 9:11 amYYC-STL
23h 16m1 stop
Logo
7:54 pm - 2:45 pmSTL-YYC
19h 51m1 stop
$305
Find Deal
Thu, Aug 28 - Tue, Sep 2
Air Canada Logo
11:25 pm - 3:18 pmYVR-STL
13h 53m1 stop
Air Canada Logo
9:15 am - 4:04 pmSTL-YVR
8h 49m1 stop
$320Air Canada
Find Deal
Wed, Sep 24 - Sat, Sep 27
American Airlines Logo
6:29 am - 11:30 amYYC-STL
28h 01m1 stop
American Airlines Logo
6:10 am - 11:19 pmSTL-YYC
18h 09m1 stop
$320American Airlines
Find Deal
Fri, Sep 5 - Sat, Sep 13
American Airlines Logo
4:44 pm - 11:56 pmYYZ-STL
8h 12m1 stop
American Airlines Logo
6:00 am - 4:04 pmSTL-YYZ
9h 04m1 stop
$321American Airlines
Find Deal
Sat, Nov 8 - Sat, Nov 15
United Airlines Logo
7:00 am - 4:53 pmYVR-STL
7h 53m1 stop
United Airlines Logo
5:30 pm - 10:18 pmSTL-YVR
6h 48m1 stop
$331United Airlines
Find Deal
Sat, Sep 13 - Sat, Sep 20
United Airlines Logo
7:00 am - 4:53 pmYVR-STL
7h 53m1 stop
United Airlines Logo
1:39 pm - 9:49 pmSTL-YVR
10h 10m1 stop
$332United Airlines
Find Deal
Sat, Sep 6 - Sat, Sep 13
Air Canada Logo
2:15 pm - 3:18 pmYYZ-STL
2h 03mnonstop
Air Canada Logo
4:05 pm - 7:00 pmSTL-YYZ
1h 55mnonstop
$352Air Canada
Find Deal
Fri, Sep 12 - Sun, Sep 14
Delta Logo
12:09 pm - 11:22 pmYVR-STL
9h 13m1 stop
Delta Logo
6:00 am - 10:59 amSTL-YVR
6h 59m1 stop
$352Delta
Find Deal
Wed, Aug 13 - Mon, Aug 18
Delta Logo
1:15 pm - 12:38 amYVR-STL
9h 23m1 stop
Delta Logo
2:25 pm - 9:00 pmSTL-YVR
8h 35m2 stops
$367Delta
Find Deal
Thu, Aug 28 - Wed, Sep 10

Air Canada flights from Canada to St. Louis

Our best Air Canada deals on Canada to St. Louis flight tickets
Air Canada
Sep 24
YVR11:25 pmVancouver Intl
13h 53m
1 stop
STL3:18 pmLambert-St Louis
Sep 27
STL9:15 amLambert-St Louis
8h 49m
1 stop
YVR4:04 pmVancouver Intl
$320
Find similar
Air Canada
Sep 12
YYZ2:15 pmToronto Pearson Intl
2h 03m
STL3:18 pmLambert-St Louis
Sep 14
STL4:05 pmLambert-St Louis
1h 55m
YYZ7:00 pmToronto Pearson Intl
$352
Find similar
Air Canada
Sep 12
YVR12:25 amVancouver Intl
12h 53m
1 stop
STL3:18 pmLambert-St Louis
Sep 20
STL4:05 pmLambert-St Louis
9h 14m
1 stop
YVR11:19 pmVancouver Intl
$354
Find similar

Delta flights from Canada to St. Louis

Our best Delta deals on Canada to St. Louis flight tickets
Delta
Aug 13
YVR12:09 pmVancouver Intl
9h 13m
1 stop
STL11:22 pmLambert-St Louis
Aug 18
STL6:00 amLambert-St Louis
6h 59m
1 stop
YVR10:59 amVancouver Intl
$352
Find similar
Delta
Aug 28
YVR1:15 pmVancouver Intl
9h 23m
1 stop
STL12:38 amLambert-St Louis
Sep 10
STL2:25 pmLambert-St Louis
8h 35m
2 stops
YVR9:00 pmVancouver Intl
$367
Find similar
Delta
Aug 28
YVR12:09 pmVancouver Intl
9h 15m
1 stop
STL11:24 pmLambert-St Louis
Sep 10
STL2:25 pmLambert-St Louis
10h 33m
2 stops
YVR10:58 pmVancouver Intl
$368
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated July 31, 2025.
Use the filters below to find and compare flights from Canada to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Sun 9/14

8:55 am-9:06 am

1 stop23h 11m

Lambert-St Louis

Sun 9/21

7:55 pm-2:45 pm

1 stop19h 50m

$281

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Thu 8/28

8:55 am-9:11 am

1 stop23h 16m

Lambert-St Louis

Tue 9/2

7:54 pm-2:45 pm

1 stop19h 51m

$305

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Wed 9/24

11:25 pm-3:18 pm

1 stop13h 53m

Lambert-St Louis

Sat 9/27

9:15 am-4:04 pm

1 stop8h 49m

$320

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Fri 9/5

6:29 am-11:30 am

1 stop28h 01m

Lambert-St Louis

Sat 9/13

6:10 am-11:19 pm

1 stop18h 09m

$320

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 11/8

4:44 pm-11:56 pm

1 stop8h 12m

Lambert-St Louis

Sat 11/15

6:00 am-4:04 pm

1 stop9h 04m

$321

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Sat 9/13

7:00 am-4:53 pm

1 stop7h 53m

Lambert-St Louis

Sat 9/20

5:30 pm-10:18 pm

1 stop6h 48m

$331

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Sat 9/6

7:00 am-4:53 pm

1 stop7h 53m

Lambert-St Louis

Sat 9/13

1:39 pm-9:49 pm

1 stop10h 10m

$332

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 9/12

2:15 pm-3:18 pm

Nonstop2h 03m

Lambert-St Louis

Sun 9/14

4:05 pm-7:00 pm

Nonstop1h 55m

$352

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Wed 8/13

12:09 pm-11:22 pm

1 stop9h 13m

Lambert-St Louis

Mon 8/18

6:00 am-10:59 am

1 stop6h 59m

$352

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Thu 8/28

1:15 pm-12:38 am

1 stop9h 23m

Lambert-St Louis

Wed 9/10

2:25 pm-9:00 pm

2 stops8h 35m

$367

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from Canada to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

In general, June is the cheapest month to fly from Canada to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $372. The month of November is another great option to travel to St. Louis, with average flight prices from Canada averaging around $464.

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

The cheapest day to depart on your flight to St. Louis is on a Saturday when prices can be found for as low as $392. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $541. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

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

Flying to St. Louis from Canada in the morning is the least expensive time of day to depart. momondo users have found prices as low as $326 when looking at flights departing in the morning. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $488 per ticket.

What is the cheapest Canada to Lambert-St Louis flight route?

Fly from Montreal Pierre Elliott Trudeau Intl to Lambert-St Louis for the best Canada - Lambert-St Louis flight prices

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 $487 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 $360 on momondo.

What cabin class options are available on Canada to Lambert-St Louis flights?

There are 4 cabin classes available to choose from on Canada to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Canada to St. Louis flights?

You could potentially save up to 17% on your flight if you consider stops on a Canada to St. Louis flight.

Cheap Canada to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Canada to St. Louis

Best Price Found

$173

Fastest flight time

2h 03m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Canada in the past 72 hours is $173. The best round-trip flight deal from Canada to St. Louis found on momondo in the last 72 hours is $281.
The fastest flight from Canada to St. Louis takes 2h 03m
Direct flights go from Canada to St. Louis every day.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
Search flight deals

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

    Prices for flights from Canada to Lambert-St Louis Airport refresh daily.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Canada to Lambert-St Louis Airport.

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

    The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Canada to St. Louis?

Best airlines flying from Canada to St. Louis

Compare and see reviews for airlines that fly from Canada to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $294Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
American AirlinesPriceFrom $309Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Air CanadaPriceFrom $324Free CancellationRating
7.1
9,851 reviews
Search Air Canada flights
DeltaPriceFrom $452Free CancellationRating
8.0
7,981 reviews
Search Delta flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
Florissant
Fenton
Collinsville
O'Fallon
Alton
St. Peters
Farmington
Wentzville
Festus
Glencoe
Eureka
Edwardsville
Clayton
Shrewsbury
Grafton

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Canada to St. Louis for you.

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

Flights from Canada to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential Canada to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Canada to St. Louis right now. Can momondo alert me if prices change?

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Canada and alert you when they change.

An easier way to manage your St. Louis trip

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