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Cheap flights from St. Louis to Montreal from C$ 206

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 14/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
6:00 a.m. - 3:08 p.m.STL-YUL
8h 08m1 stop
American Airlines Logo
3:50 p.m. - 10:20 a.m.YUL-STL
19h 30m1 stop
C$ 508American Airlines
Find Deal
Tue, 13 Jan - Tue, 27 Jan
American Airlines Logo
3:20 p.m. - 3:08 p.m.STL-YUL
22h 48m1 stop
American Airlines Logo
7:30 a.m. - 6:16 p.m.YUL-STL
11h 46m2 stops
C$ 522American Airlines
Find Deal
Tue, 13 Jan - Tue, 27 Jan
Multiple Airlines Logo
5:11 p.m. - 5:00 p.m.STL-YUL
22h 49m2 stops
Multiple Airlines Logo
4:35 p.m. - 10:34 p.m.YUL-STL
30h 59m1 stop
C$ 542Multiple Airlines
Find Deal
Fri, 9 Jan - Fri, 16 Jan
American Airlines Logo
11:05 a.m. - 3:08 p.m.STL-YUL
27h 03m1 stop
American Airlines Logo
3:50 p.m. - 10:20 a.m.YUL-STL
19h 30m1 stop
C$ 576American Airlines
Find Deal
Sat, 17 Jan - Mon, 19 Jan
American Airlines Logo
11:05 a.m. - 3:08 p.m.STL-YUL
27h 03m1 stop
American Airlines Logo
3:50 p.m. - 10:20 a.m.YUL-STL
19h 30m1 stop
C$ 577American Airlines
Find Deal
Sat, 17 Jan - Mon, 19 Jan
American Airlines Logo
6:00 a.m. - 3:08 p.m.STL-YUL
8h 08m1 stop
American Airlines Logo
3:50 p.m. - 10:20 a.m.YUL-STL
19h 30m1 stop
C$ 631American Airlines
Find Deal
Thu, 15 Jan - Mon, 19 Jan
American Airlines Logo
6:44 p.m. - 3:08 p.m.STL-YUL
19h 24m1 stop
American Airlines Logo
3:50 p.m. - 10:20 a.m.YUL-STL
19h 30m1 stop
C$ 655American Airlines
Find Deal
Fri, 9 Jan - Fri, 16 Jan
Multiple Airlines Logo
10:40 a.m. - 12:30 a.m.STL-YUL
12h 50m1 stop
Multiple Airlines Logo
6:45 a.m. - 10:33 p.m.YUL-STL
40h 48m2 stops
C$ 665Multiple Airlines
Find Deal
Mon, 29 Dec - Tue, 6 Jan
United Airlines Logo
8:05 a.m. - 9:16 p.m.STL-YUL
12h 11m2 stops
United Airlines Logo
10:25 a.m. - 10:58 p.m.YUL-STL
13h 33m2 stops
C$ 681United Airlines
Find Deal
Tue, 13 Jan - Tue, 27 Jan
United Airlines Logo
8:05 a.m. - 9:16 p.m.STL-YUL
12h 11m2 stops
United Airlines Logo
10:25 a.m. - 10:58 p.m.YUL-STL
13h 33m2 stops
C$ 707United Airlines
Find Deal
Wed, 21 Jan - Mon, 26 Jan

United Airlines flights from St. Louis to Montreal

Our best United Airlines deals on St. Louis to Montreal flight tickets
United Airlines
13 Jan
STL8:05 a.m.Lambert-St Louis
12h 11m
2 stops
YUL9:16 p.m.Montreal Pierre Elliott Trudeau Intl
27 Jan
YUL10:25 a.m.Montreal Pierre Elliott Trudeau Intl
13h 33m
2 stops
STL10:58 p.m.Lambert-St Louis
C$ 681
Find similar
United Airlines
21 Jan
STL8:05 a.m.Lambert-St Louis
12h 11m
2 stops
YUL9:16 p.m.Montreal Pierre Elliott Trudeau Intl
26 Jan
YUL10:25 a.m.Montreal Pierre Elliott Trudeau Intl
13h 33m
2 stops
STL10:58 p.m.Lambert-St Louis
C$ 707
Find similar
United Airlines
11 Dec
STL8:30 a.m.Lambert-St Louis
5h 46m
1 stop
YUL3:16 p.m.Montreal Pierre Elliott Trudeau Intl
14 Dec
YUL6:00 a.m.Montreal Pierre Elliott Trudeau Intl
6h 01m
1 stop
STL11:01 a.m.Lambert-St Louis
C$ 882
Find similar

Delta flights from St. Louis to Montreal

Our best Delta deals on St. Louis to Montreal flight tickets
Delta
30 Dec
STL5:59 p.m.Lambert-St Louis
4h 20m
1 stop
YUL11:19 p.m.Montreal Pierre Elliott Trudeau Intl
8 Jan
YUL9:34 a.m.Montreal Pierre Elliott Trudeau Intl
12h 09m
2 stops
STL8:43 p.m.Lambert-St Louis
C$ 914
Find similar
Delta
2 Jan
STL5:59 p.m.Lambert-St Louis
4h 20m
1 stop
YUL11:19 p.m.Montreal Pierre Elliott Trudeau Intl
7 Jan
YUL9:34 a.m.Montreal Pierre Elliott Trudeau Intl
12h 09m
2 stops
STL8:43 p.m.Lambert-St Louis
C$ 944
Find similar
Delta
15 Dec
STL9:50 a.m.Lambert-St Louis
8h 04m
1 stop
YUL6:54 p.m.Montreal Pierre Elliott Trudeau Intl
6 Jan
YUL2:45 p.m.Montreal Pierre Elliott Trudeau Intl
9h 54m
1 stop
STL11:39 p.m.Lambert-St Louis
C$ 975
Find similar

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 26 November 2025.
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

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 13/1

6:00 a.m.-3:08 p.m.

1 stop8h 08m

Montreal Pierre Elliott Trudeau Intl

Tue 27/1

3:50 p.m.-10:20 a.m.

1 stop19h 30m

C$ 508

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 13/1

3:20 p.m.-3:08 p.m.

1 stop22h 48m

Montreal Pierre Elliott Trudeau Intl

Tue 27/1

7:30 a.m.-6:16 p.m.

2 stops11h 46m

C$ 522

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 9/1

5:11 p.m.-5:00 p.m.

2 stops22h 49m

Montreal Pierre Elliott Trudeau Intl

Fri 16/1

4:35 p.m.-10:34 p.m.

1 stop30h 59m

C$ 542

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 17/1

11:05 a.m.-3:08 p.m.

1 stop27h 03m

Montreal Pierre Elliott Trudeau Intl

Mon 19/1

3:50 p.m.-10:20 a.m.

1 stop19h 30m

C$ 576

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 17/1

11:05 a.m.-3:08 p.m.

1 stop27h 03m

Montreal Pierre Elliott Trudeau Intl

Mon 19/1

3:50 p.m.-10:20 a.m.

1 stop19h 30m

C$ 577

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 15/1

6:00 a.m.-3:08 p.m.

1 stop8h 08m

Montreal Pierre Elliott Trudeau Intl

Mon 19/1

3:50 p.m.-10:20 a.m.

1 stop19h 30m

C$ 631

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 9/1

6:44 p.m.-3:08 p.m.

1 stop19h 24m

Montreal Pierre Elliott Trudeau Intl

Fri 16/1

3:50 p.m.-10:20 a.m.

1 stop19h 30m

C$ 655

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 29/12

10:40 a.m.-12:30 a.m.

1 stop12h 50m

Montreal Pierre Elliott Trudeau Intl

Tue 6/1

6:45 a.m.-10:33 p.m.

2 stops40h 48m

C$ 665

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 13/1

8:05 a.m.-9:16 p.m.

2 stops12h 11m

Montreal Pierre Elliott Trudeau Intl

Tue 27/1

10:25 a.m.-10:58 p.m.

2 stops13h 33m

C$ 681

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 21/1

8:05 a.m.-9:16 p.m.

2 stops12h 11m

Montreal Pierre Elliott Trudeau Intl

Mon 26/1

10:25 a.m.-10:58 p.m.

2 stops13h 33m

C$ 707

Flights are sorted by cheapest round-trip flights first.

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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 39% 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 35m

Direct flights

Fri and Sat

Airports in Montreal

1 airport
The fastest flight from St. Louis to Montreal takes 2h 35m
Direct flights go from St. Louis to Montreal on Friday and Saturday. There are no airlines offering direct flights.
There is 1 airport near Montreal: 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 35m, 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.

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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