Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Canada to St. Louis from $119

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 12/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Canada to St. Louis

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

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:30 am - 10:33 pmYOW-STL
14h 03m1 stop
Multiple Airlines Logo
5:11 pm - 5:13 pmSTL-YOW
23h 02m1 stop
$242Multiple Airlines
Find Deal
Fri, Jan 23 - Sun, Jan 25
American Airlines Logo
1:31 pm - 1:17 pmYYC-STL
22h 46m1 stop
American Airlines Logo
8:01 pm - 12:51 pmSTL-YYC
17h 50m1 stop
$249American Airlines
Find Deal
Mon, Dec 22 - Tue, Dec 30
United Airlines Logo
2:50 pm - 9:55 pmYHZ-STL
9h 05m1 stop
United Airlines Logo
6:30 am - 1:54 pmSTL-YHZ
5h 24m1 stop
$280United Airlines
Find Deal
Tue, Apr 7 - Wed, Apr 8
United Airlines Logo
2:50 pm - 9:55 pmYHZ-STL
9h 05m1 stop
United Airlines Logo
9:30 am - 11:44 pmSTL-YHZ
12h 14m2 stops
$281United Airlines
Find Deal
Tue, Apr 7 - Wed, Apr 8
Air Canada Logo
5:35 am - 3:29 pmYHZ-STL
11h 54m2 stops
Air Canada Logo
4:05 pm - 12:26 amSTL-YHZ
6h 21m1 stop
$287Air Canada
Find Deal
Thu, Nov 27 - Tue, Dec 2
Air Canada Logo
5:35 am - 3:29 pmYHZ-STL
11h 54m2 stops
Air Canada Logo
4:05 pm - 12:26 amSTL-YHZ
6h 21m1 stop
$288Air Canada
Find Deal
Thu, Nov 27 - Tue, Dec 2
Alaska Airlines Logo
6:00 am - 1:52 pmYVR-STL
5h 52m1 stop
Alaska Airlines Logo
2:55 pm - 8:55 pmSTL-YVR
8h 00m1 stop
$357Alaska Airlines
Find Deal
Tue, Mar 3 - Wed, Mar 4
Delta Logo
12:07 pm - 11:23 pmYVR-STL
9h 16m1 stop
Delta Logo
6:30 am - 12:27 pmSTL-YVR
7h 57m1 stop
$358Delta
Find Deal
Tue, Nov 25 - Tue, Dec 2
Delta Logo
12:07 pm - 11:23 pmYVR-STL
9h 16m1 stop
Delta Logo
2:20 pm - 10:44 pmSTL-YVR
10h 24m1 stop
$381Delta
Find Deal
Wed, Nov 26 - Wed, Dec 3
Alaska Airlines Logo
6:15 am - 11:56 pmYYJ-STL
15h 41m1 stop
Alaska Airlines Logo
7:00 am - 10:33 pmSTL-YYJ
17h 33m1 stop
$408Alaska Airlines
Find Deal
Tue, Mar 3 - Wed, Mar 4

American Airlines flights from Canada to St. Louis

Our best American Airlines deals on Canada to St. Louis flight tickets
American Airlines
Dec 22
YYC1:31 pmCalgary
22h 46m
1 stop
STL1:17 pmLambert-St Louis
Dec 30
STL8:01 pmLambert-St Louis
17h 50m
1 stop
YYC12:51 pmCalgary
$249
Find similar
American Airlines
Jan 21
YYZ11:30 amToronto Pearson Intl
7h 44m
1 stop
STL6:14 pmLambert-St Louis
Jan 24
STL6:43 pmLambert-St Louis
15h 10m
1 stop
YYZ10:53 amToronto Pearson Intl
$303
Find similar
American Airlines
Dec 9
YYZ11:36 amToronto Pearson Intl
9h 48m
1 stop
STL8:24 pmLambert-St Louis
Dec 10
STL5:05 amLambert-St Louis
9h 58m
1 stop
YYZ4:03 pmToronto Pearson Intl
$306
Find similar

United Airlines flights from Canada to St. Louis

Our best United Airlines deals on Canada to St. Louis flight tickets
United Airlines
Apr 7
YHZ2:50 pmHalifax Intl
9h 05m
1 stop
STL9:55 pmLambert-St Louis
Apr 8
STL6:30 amLambert-St Louis
5h 24m
1 stop
YHZ1:54 pmHalifax Intl
$280
Find similar
United Airlines
Apr 7
YHZ2:50 pmHalifax Intl
9h 05m
1 stop
STL9:55 pmLambert-St Louis
Apr 8
STL9:30 amLambert-St Louis
12h 14m
2 stops
YHZ11:44 pmHalifax Intl
$281
Find similar
United Airlines
Mar 3
YVR8:30 amVancouver Intl
9h 56m
1 stop
STL8:26 pmLambert-St Louis
Mar 4
STL2:45 pmLambert-St Louis
10h 21m
1 stop
YVR11:06 pmVancouver Intl
$298
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 October 30, 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

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 1/23

9:30 am-10:33 pm

1 stop14h 03m

Lambert-St Louis

Sun 1/25

5:11 pm-5:13 pm

1 stop23h 02m

$242

CalgarySt. Louis

YYC - STL

YYCSTL

Calgary

Mon 12/22

1:31 pm-1:17 pm

1 stop22h 46m

Lambert-St Louis

Tue 12/30

8:01 pm-12:51 pm

1 stop17h 50m

$249

HalifaxSt. Louis

YHZ - STL

YHZSTL

Halifax Intl

Tue 4/7

2:50 pm-9:55 pm

1 stop9h 05m

Lambert-St Louis

Wed 4/8

6:30 am-1:54 pm

1 stop5h 24m

$280

HalifaxSt. Louis

YHZ - STL

YHZSTL

Halifax Intl

Tue 4/7

2:50 pm-9:55 pm

1 stop9h 05m

Lambert-St Louis

Wed 4/8

9:30 am-11:44 pm

2 stops12h 14m

$281

HalifaxSt. Louis

YHZ - STL

YHZSTL

Halifax Intl

Thu 11/27

5:35 am-3:29 pm

2 stops11h 54m

Lambert-St Louis

Tue 12/2

4:05 pm-12:26 am

1 stop6h 21m

$287

HalifaxSt. Louis

YHZ - STL

YHZSTL

Halifax Intl

Thu 11/27

5:35 am-3:29 pm

2 stops11h 54m

Lambert-St Louis

Tue 12/2

4:05 pm-12:26 am

1 stop6h 21m

$288

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Tue 3/3

6:00 am-1:52 pm

1 stop5h 52m

Lambert-St Louis

Wed 3/4

2:55 pm-8:55 pm

1 stop8h 00m

$357

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Tue 11/25

12:07 pm-11:23 pm

1 stop9h 16m

Lambert-St Louis

Tue 12/2

6:30 am-12:27 pm

1 stop7h 57m

$358

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Wed 11/26

12:07 pm-11:23 pm

1 stop9h 16m

Lambert-St Louis

Wed 12/3

2:20 pm-10:44 pm

1 stop10h 24m

$381

VictoriaSt. Louis

YYJ - STL

YYJSTL

Victoria Intl

Tue 3/3

6:15 am-11:56 pm

1 stop15h 41m

Lambert-St Louis

Wed 3/4

7:00 am-10:33 pm

1 stop17h 33m

$408

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 August is another great option to travel to St. Louis, with average flight prices from Canada averaging around $397.

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 Tuesday when prices can be found for as low as $391. 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 $486 per ticket.

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

Fly from Toronto Pearson 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 $489 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 46% 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

$323

Fastest flight time

2h 29m

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 $323. The best round-trip flight deal from Canada to St. Louis found on momondo in the last 72 hours is $489.
The fastest flight from Canada to St. Louis takes 2h 29m
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
American AirlinesPriceFrom $288Free CancellationRating
7.2
11,030 reviews
Search American Airlines flights
United AirlinesPriceFrom $295Free CancellationRating
7.4
8,998 reviews
Search United Airlines flights
Air CanadaPriceFrom $324Free CancellationRating
7.1
10,377 reviews
Search Air Canada flights
DeltaPriceFrom $452Free CancellationRating
7.9
7,993 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
O'Fallon
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
Eureka
Litchfield
Shrewsbury

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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 11/29
Sat 12/6
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States