Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from St. Louis to Montreal from C$ 234

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Montreal departing on 11/5. 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

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Early arrival? 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 St. Louis to Montreal

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
8:03 p.m. - 11:44 a.m.
STL
-
YUL
14h 41m
1 stop
American Airlines Logo
12:30 p.m. - 10:17 p.m.
YUL
-
STL
10h 47m
1 stop
C$ 524American Airlines
Wed, 8 Apr - Wed, 15 Apr
American Airlines Logo
8:54 a.m. - 9:37 p.m.
STL
-
YUL
11h 43m
2 stops
American Airlines Logo
12:30 p.m. - 10:17 p.m.
YUL
-
STL
10h 47m
1 stop
C$ 538American Airlines
Wed, 8 Apr - Wed, 15 Apr
American Airlines Logo
8:54 a.m. - 9:37 p.m.
STL
-
YUL
11h 43m
2 stops
American Airlines Logo
1:03 p.m. - 11:46 p.m.
YUL
-
STL
11h 43m
2 stops
C$ 545American Airlines
Wed, 8 Apr - Wed, 15 Apr
American Airlines Logo
8:03 p.m. - 11:44 a.m.
STL
-
YUL
14h 41m
1 stop
American Airlines Logo
12:30 p.m. - 11:46 p.m.
YUL
-
STL
12h 16m
1 stop
C$ 549American Airlines
Sat, 11 Apr - Sat, 18 Apr
American Airlines Logo
2:33 p.m. - 11:44 a.m.
STL
-
YUL
20h 11m
1 stop
American Airlines Logo
1:03 p.m. - 11:46 p.m.
YUL
-
STL
11h 43m
2 stops
C$ 562American Airlines
Sat, 11 Apr - Sat, 18 Apr
American Airlines Logo
7:05 a.m. - 9:37 p.m.
STL
-
YUL
13h 32m
2 stops
American Airlines Logo
1:03 p.m. - 11:46 p.m.
YUL
-
STL
11h 43m
2 stops
C$ 569American Airlines
Sat, 11 Apr - Sat, 18 Apr
American Airlines Logo
5:21 p.m. - 11:44 a.m.
STL
-
YUL
17h 23m
1 stop
American Airlines Logo
12:30 p.m. - 10:17 p.m.
YUL
-
STL
10h 47m
1 stop
C$ 577American Airlines
Mon, 27 Apr - Mon, 4 May
American Airlines Logo
8:02 p.m. - 11:44 a.m.
STL
-
YUL
14h 42m
1 stop
American Airlines Logo
12:30 p.m. - 11:54 p.m.
YUL
-
STL
12h 24m
1 stop
C$ 579American Airlines
Sat, 23 May - Tue, 26 May
American Airlines Logo
8:03 p.m. - 11:44 a.m.
STL
-
YUL
14h 41m
1 stop
American Airlines Logo
1:03 p.m. - 11:46 p.m.
YUL
-
STL
11h 43m
2 stops
C$ 590American Airlines
Mon, 27 Apr - Mon, 4 May
American Airlines Logo
8:03 p.m. - 11:44 a.m.
STL
-
YUL
14h 41m
1 stop
American Airlines Logo
12:30 p.m. - 8:09 p.m.
YUL
-
STL
8h 39m
1 stop
C$ 606American Airlines
Sat, 25 Apr - Sat, 2 May

American Airlines flights from St. Louis to Montreal

Our best American Airlines deals on St. Louis to Montreal flight tickets
American Airlines
8 Apr
STL8:03 p.m.Lambert-St Louis
14h 41m
1 stop
YUL11:44 a.m.Montreal Pierre Elliott Trudeau Intl
15 Apr
YUL12:30 p.m.Montreal Pierre Elliott Trudeau Intl
10h 47m
1 stop
STL10:17 p.m.Lambert-St Louis
C$ 524
American Airlines
8 Apr
STL8:54 a.m.Lambert-St Louis
11h 43m
2 stops
YUL9:37 p.m.Montreal Pierre Elliott Trudeau Intl
15 Apr
YUL12:30 p.m.Montreal Pierre Elliott Trudeau Intl
10h 47m
1 stop
STL10:17 p.m.Lambert-St Louis
C$ 538
American Airlines
8 Apr
STL8:54 a.m.Lambert-St Louis
11h 43m
2 stops
YUL9:37 p.m.Montreal Pierre Elliott Trudeau Intl
15 Apr
YUL1:03 p.m.Montreal Pierre Elliott Trudeau Intl
11h 43m
2 stops
STL11:46 p.m.Lambert-St Louis
C$ 545

United Airlines flights from St. Louis to Montreal

Our best United Airlines deals on St. Louis to Montreal flight tickets
United Airlines
21 Apr
STL7:45 a.m.Lambert-St Louis
10h 11m
1 stop
YUL6:56 p.m.Montreal Pierre Elliott Trudeau Intl
25 Apr
YUL1:20 p.m.Montreal Pierre Elliott Trudeau Intl
9h 32m
1 stop
STL9:52 p.m.Lambert-St Louis
C$ 654
United Airlines
21 Apr
STL9:10 a.m.Lambert-St Louis
8h 46m
1 stop
YUL6:56 p.m.Montreal Pierre Elliott Trudeau Intl
25 Apr
YUL1:20 p.m.Montreal Pierre Elliott Trudeau Intl
8h 53m
1 stop
STL9:13 p.m.Lambert-St Louis
C$ 668
United Airlines
21 Apr
STL7:45 a.m.Lambert-St Louis
10h 11m
1 stop
YUL6:56 p.m.Montreal Pierre Elliott Trudeau Intl
25 Apr
YUL1:20 p.m.Montreal Pierre Elliott Trudeau Intl
8h 53m
1 stop
STL9:13 p.m.Lambert-St Louis
C$ 686

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Montreal 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 96,600 searches. Data last updated 14 March 2026.
Use the filters below to find and compare flights from St. Louis to Montreal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 8/4

8:03 p.m.-11:44 a.m.

1 stop14h 41m

Montreal Pierre Elliott Trudeau Intl

Wed 15/4

12:30 p.m.-10:17 p.m.

1 stop10h 47m

C$ 524
Quickest round-trip

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 8/4

8:54 a.m.-9:37 p.m.

2 stops11h 43m

Montreal Pierre Elliott Trudeau Intl

Wed 15/4

12:30 p.m.-10:17 p.m.

1 stop10h 47m

C$ 538

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 8/4

8:54 a.m.-9:37 p.m.

2 stops11h 43m

Montreal Pierre Elliott Trudeau Intl

Wed 15/4

1:03 p.m.-11:46 p.m.

2 stops11h 43m

C$ 545

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 11/4

8:03 p.m.-11:44 a.m.

1 stop14h 41m

Montreal Pierre Elliott Trudeau Intl

Sat 18/4

12:30 p.m.-11:46 p.m.

1 stop12h 16m

C$ 549

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 11/4

2:33 p.m.-11:44 a.m.

1 stop20h 11m

Montreal Pierre Elliott Trudeau Intl

Sat 18/4

1:03 p.m.-11:46 p.m.

2 stops11h 43m

C$ 562

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 11/4

7:05 a.m.-9:37 p.m.

2 stops13h 32m

Montreal Pierre Elliott Trudeau Intl

Sat 18/4

1:03 p.m.-11:46 p.m.

2 stops11h 43m

C$ 569

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 27/4

5:21 p.m.-11:44 a.m.

1 stop17h 23m

Montreal Pierre Elliott Trudeau Intl

Mon 4/5

12:30 p.m.-10:17 p.m.

1 stop10h 47m

C$ 577

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 23/5

8:02 p.m.-11:44 a.m.

1 stop14h 42m

Montreal Pierre Elliott Trudeau Intl

Tue 26/5

12:30 p.m.-11:54 p.m.

1 stop12h 24m

C$ 579

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 27/4

8:03 p.m.-11:44 a.m.

1 stop14h 41m

Montreal Pierre Elliott Trudeau Intl

Mon 4/5

1:03 p.m.-11:46 p.m.

2 stops11h 43m

C$ 590

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 25/4

8:03 p.m.-11:44 a.m.

1 stop14h 41m

Montreal Pierre Elliott Trudeau Intl

Sat 2/5

12:30 p.m.-8:09 p.m.

1 stop8h 39m

C$ 606

Flights are sorted by cheapest round-trip flights first.

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

See travel insights to Montreal from

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

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 typical price of a round-trip flight between St. Louis and Montreal?

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

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

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

There is only 1 cabin class available to choose from on Lambert-St Louis to Montreal 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 St. Louis to Montreal flights?

You could potentially save up to 42% on your flight if you consider stops on a St. Louis to Montreal flight.

When to book flights from St. Louis to Montreal

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Montreal according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Montreal (STL to YMQ) flight deals and tips

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

Fastest flight time

2h 32m

Direct flights

Every day

Airports in Montreal

2 airports
The fastest flight from St. Louis to Montreal takes 2h 32m
Direct flights go from St. Louis to Montreal every day.
There are 2 airports in Montreal. From St. Louis there are direct flights to Montreal Pierre Elliott Trudeau Intl (YUL).
Search flight deals

  • How far is Lambert-St Louis to Montreal by plane?

    The straight-line distance from Lambert-St Louis to Montreal is 1566.0 km. Flights usually cover this in 2h 32m, depending on flying conditions and air traffic around both airports.

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

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

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

    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 from Lambert-St Louis Airport to Montreal.

  • What documentation or ID do you need to fly to Montreal?

    The necessary travel and health documents for your Montreal trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Montreal from St. Louis.

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

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

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

Once you have performed a search for St. Louis to Montreal flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes momondo offers price alerts on flights to Montreal from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Montreal 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
Mon 13/4
Mon 20/4
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Canada

Fly into one of these airports located in Montreal

Airports listed have a maximum distance of 15.1 km from Montreal
Montreal St Hubert Airport
Montreal Pierre Elliott Trudeau Intl Airport