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Cheap flights from Canada to St. Louis from $131

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 1/12. 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

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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
9:45 pm - 6:51 am
YYC
-
STL
32h 06m2 stops
Multiple Airlines Logo
8:22 pm - 11:43 am
STL
-
YYC
16h 21m1 stop
$217Multiple Airlines
Sat, Jan 31 - Sat, Feb 7
Multiple Airlines Logo
7:15 am - 11:33 pm
YYZ
-
STL
17h 18m1 stop
Multiple Airlines Logo
8:59 am - 2:20 pm
STL
-
YYZ
28h 21m1 stop
$221Multiple Airlines
Tue, Feb 3 - Sun, Feb 8
Air Canada Logo
9:00 am - 3:29 pm
YHZ
-
STL
8h 29m1 stop
Air Canada Logo
4:05 pm - 12:06 am
STL
-
YHZ
6h 01m1 stop
$277Air Canada
Tue, Jan 27 - Mon, Feb 2
United Airlines Logo
3:15 pm - 10:58 pm
YHZ
-
STL
9h 43m2 stops
United Airlines Logo
6:40 pm - 2:31 pm
STL
-
YHZ
17h 51m2 stops
$283United Airlines
Tue, Jan 27 - Mon, Feb 2
Air Canada Logo
6:55 am - 3:29 pm
YHZ
-
STL
10h 34m2 stops
Air Canada Logo
4:05 pm - 12:06 am
STL
-
YHZ
6h 01m1 stop
$286Air Canada
Tue, Jan 27 - Mon, Feb 2
United Airlines Logo
3:15 pm - 10:58 pm
YHZ
-
STL
9h 43m2 stops
United Airlines Logo
4:49 pm - 2:31 pm
STL
-
YHZ
19h 42m2 stops
$291United Airlines
Tue, Jan 27 - Mon, Feb 2
Delta Logo
1:21 pm - 11:25 pm
YVR
-
STL
8h 04m2 stops
Delta Logo
2:22 pm - 9:00 pm
STL
-
YVR
8h 38m2 stops
$318Delta
Wed, Jan 7 - Thu, Feb 26
Delta Logo
7:25 am - 9:38 pm
YVR
-
STL
12h 13m2 stops
Delta Logo
2:38 pm - 11:59 pm
STL
-
YVR
11h 21m2 stops
$321Delta
Sat, Jan 31 - Sat, Feb 7
American Airlines Logo
3:55 pm - 9:34 am
YUL
-
STL
18h 39m1 stop
American Airlines Logo
6:00 am - 3:05 pm
STL
-
YUL
8h 05m1 stop
$338American Airlines
Fri, Feb 20 - Mon, Feb 23
American Airlines Logo
7:12 am - 6:08 pm
YUL
-
STL
11h 56m1 stop
American Airlines Logo
6:00 am - 3:10 pm
STL
-
YUL
8h 10m1 stop
$508American Airlines
Mon, Feb 16 - Wed, Feb 18

Air Canada flights from Canada to St. Louis

Our best Air Canada deals on Canada to St. Louis flight tickets
Air Canada
Jan 27
YHZ9:00 amHalifax Intl
8h 29m
1 stop
STL3:29 pmLambert-St Louis
Feb 2
STL4:05 pmLambert-St Louis
6h 01m
1 stop
YHZ12:06 amHalifax Intl
$277
Find similar
Air Canada
Jan 27
YHZ9:00 amHalifax Intl
8h 29m
1 stop
STL3:29 pmLambert-St Louis
Feb 2
STL4:05 pmLambert-St Louis
6h 01m
1 stop
YHZ12:06 amHalifax Intl
$286
Find similar
Air Canada
Jan 27
YHZ6:55 amHalifax Intl
10h 34m
2 stops
STL3:29 pmLambert-St Louis
Feb 2
STL4:05 pmLambert-St Louis
6h 01m
1 stop
YHZ12:06 amHalifax Intl
$295
Find similar

United Airlines flights from Canada to St. Louis

Our best United Airlines deals on Canada to St. Louis flight tickets
United Airlines
Jan 27
YHZ3:15 pmHalifax Intl
9h 43m
2 stops
STL10:58 pmLambert-St Louis
Feb 2
STL6:40 pmLambert-St Louis
17h 51m
2 stops
YHZ2:31 pmHalifax Intl
$283
Find similar
United Airlines
Jan 27
YHZ3:15 pmHalifax Intl
9h 43m
2 stops
STL10:58 pmLambert-St Louis
Feb 2
STL4:49 pmLambert-St Louis
19h 42m
2 stops
YHZ2:31 pmHalifax Intl
$291
Find similar
United Airlines
Jan 8
YOW5:11 pmOttawa
6h 47m
1 stop
STL10:58 pmLambert-St Louis
Jan 12
STL7:00 amLambert-St Louis
5h 32m
1 stop
YOW1:32 pmOttawa
$304
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 December 18, 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

Sat 1/31

9:45 pm-6:51 am

2 stops32h 06m

Lambert-St Louis

Sat 2/7

8:22 pm-11:43 am

1 stop16h 21m

$217

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 2/3

7:15 am-11:33 pm

1 stop17h 18m

Lambert-St Louis

Sun 2/8

8:59 am-2:20 pm

1 stop28h 21m

$221

HalifaxSt. Louis

YHZ - STL

YHZSTL

Halifax Intl

Tue 1/27

9:00 am-3:29 pm

1 stop8h 29m

Lambert-St Louis

Mon 2/2

4:05 pm-12:06 am

1 stop6h 01m

$277

HalifaxSt. Louis

YHZ - STL

YHZSTL

Halifax Intl

Tue 1/27

3:15 pm-10:58 pm

2 stops9h 43m

Lambert-St Louis

Mon 2/2

6:40 pm-2:31 pm

2 stops17h 51m

$283

HalifaxSt. Louis

YHZ - STL

YHZSTL

Halifax Intl

Tue 1/27

6:55 am-3:29 pm

2 stops10h 34m

Lambert-St Louis

Mon 2/2

4:05 pm-12:06 am

1 stop6h 01m

$286

HalifaxSt. Louis

YHZ - STL

YHZSTL

Halifax Intl

Tue 1/27

3:15 pm-10:58 pm

2 stops9h 43m

Lambert-St Louis

Mon 2/2

4:49 pm-2:31 pm

2 stops19h 42m

$291

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Wed 1/7

1:21 pm-11:25 pm

2 stops8h 04m

Lambert-St Louis

Thu 2/26

2:22 pm-9:00 pm

2 stops8h 38m

$318

VancouverSt. Louis

YVR - STL

YVRSTL

Vancouver Intl

Sat 1/31

7:25 am-9:38 pm

2 stops12h 13m

Lambert-St Louis

Sat 2/7

2:38 pm-11:59 pm

2 stops11h 21m

$321

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 2/20

3:55 pm-9:34 am

1 stop18h 39m

Lambert-St Louis

Mon 2/23

6:00 am-3:05 pm

1 stop8h 05m

$338

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 2/16

7:12 am-6:08 pm

1 stop11h 56m

Lambert-St Louis

Wed 2/18

6:00 am-3:10 pm

1 stop8h 10m

$508

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 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 Saturday when prices can be found for as low as $405. 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 $542. 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 $492 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 $472 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

$542

Fastest flight time

2h 14m

Direct flights

Every day

Airports in St. Louis

1 airport
The best flight deal from Canada to St. Louis found on momondo in the last 72 hours is $542
The fastest flight from Canada to St. Louis takes 2h 14m
Direct flights go from Canada to St. Louis every day.
There is 1 airport in St. Louis. From Canada there are direct flights to 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
11,054 reviews
Search American Airlines flights
United AirlinesPriceFrom $295Free CancellationRating
7.4
9,093 reviews
Search United Airlines flights
Air CanadaPriceFrom $324Free CancellationRating
7.1
10,534 reviews
Search Air Canada flights
Alaska AirlinesPriceFrom $344Free CancellationRating
8.0
11,479 reviews
Search Alaska Airlines flights
DeltaPriceFrom $452Free CancellationRating
7.9
8,009 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
O'Fallon
Florissant
Fenton
Wentzville
St. Peters
Collinsville
Alton
Clayton
Festus
Glencoe
Farmington
Eureka
Edwardsville
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.
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