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Cheap flights from St. Louis to Montreal from C$ 198

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 29/4. 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

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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
4:30 p.m. - 11:44 a.m.
STL
-
YUL
18h 14m
1 stop
American Airlines Logo
12:30 p.m. - 10:19 p.m.
YUL
-
STL
10h 49m
1 stop
C$ 476American Airlines
Tue, 14 Apr - Tue, 21 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$ 490American Airlines
Tue, 14 Apr - Tue, 21 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$ 525American Airlines
Wed, 29 Apr - Mon, 4 May
American Airlines Logo
4:30 p.m. - 11:44 a.m.
STL
-
YUL
18h 14m
1 stop
American Airlines Logo
12:30 p.m. - 11:46 p.m.
YUL
-
STL
12h 16m
1 stop
C$ 578American Airlines
Sat, 2 May - Mon, 4 May
American Airlines Logo
4:30 p.m. - 11:44 a.m.
STL
-
YUL
18h 14m
1 stop
American Airlines Logo
1:03 p.m. - 11:56 p.m.
YUL
-
STL
11h 53m
2 stops
C$ 591American Airlines
Sat, 2 May - Sat, 9 May
American Airlines Logo
6:00 a.m. - 4:53 p.m.
STL
-
YUL
9h 53m
1 stop
American Airlines Logo
12:30 p.m. - 8:30 p.m.
YUL
-
STL
9h 00m
1 stop
C$ 631American Airlines
Wed, 3 Jun - Tue, 9 Jun
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$ 676American Airlines
Tue, 14 Apr - Tue, 21 Apr
United Airlines Logo
7:45 a.m. - 5:30 p.m.
STL
-
YUL
8h 45m
1 stop
United Airlines Logo
9:45 a.m. - 9:52 p.m.
YUL
-
STL
13h 07m
1 stop
C$ 697United Airlines
Tue, 21 Apr - Sat, 25 Apr
United Airlines Logo
7:45 a.m. - 6:56 p.m.
STL
-
YUL
10h 11m
1 stop
United Airlines Logo
9:15 a.m. - 9:13 p.m.
YUL
-
STL
12h 58m
2 stops
C$ 711United Airlines
Tue, 21 Apr - Sat, 25 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$ 715American Airlines
Sun, 3 May - Tue, 5 May

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
8h 45m
1 stop
YUL5:30 p.m.Montreal Pierre Elliott Trudeau Intl
25 Apr
YUL9:45 a.m.Montreal Pierre Elliott Trudeau Intl
13h 07m
1 stop
STL9:52 p.m.Lambert-St Louis
C$ 697
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
YUL9:15 a.m.Montreal Pierre Elliott Trudeau Intl
12h 58m
2 stops
STL9:13 p.m.Lambert-St Louis
C$ 711
United Airlines
21 Apr
STL6:30 a.m.Lambert-St Louis
10h 07m
2 stops
YUL5:37 p.m.Montreal Pierre Elliott Trudeau Intl
25 Apr
YUL9:15 a.m.Montreal Pierre Elliott Trudeau Intl
12h 58m
2 stops
STL9:13 p.m.Lambert-St Louis
C$ 717

Air Canada flights from St. Louis to Montreal

Our best Air Canada deals on St. Louis to Montreal flight tickets
Air Canada
4 May
STL1:05 p.m.Lambert-St Louis
2h 35m
YUL4:40 p.m.Montreal Pierre Elliott Trudeau Intl
11 May
YUL6:30 p.m.Montreal Pierre Elliott Trudeau Intl
2h 55m
STL8:25 p.m.Lambert-St Louis
C$ 774
Air Canada
4 May
STL1:05 p.m.Lambert-St Louis
2h 35m
YUL4:40 p.m.Montreal Pierre Elliott Trudeau Intl
11 May
YUL6:30 p.m.Montreal Pierre Elliott Trudeau Intl
2h 55m
STL8:25 p.m.Lambert-St Louis
C$ 779
Air Canada
4 May
STL7:05 a.m.Lambert-St Louis
5h 16m
1 stop
YUL1:21 p.m.Montreal Pierre Elliott Trudeau Intl
11 May
YUL6:30 p.m.Montreal Pierre Elliott Trudeau Intl
2h 55m
STL8:25 p.m.Lambert-St Louis
C$ 783

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 21 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

Tue 14/4

4:30 p.m.-11:44 a.m.

1 stop18h 14m

Montreal Pierre Elliott Trudeau Intl

Tue 21/4

12:30 p.m.-10:19 p.m.

1 stop10h 49m

C$ 476

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 14/4

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

1 stop20h 11m

Montreal Pierre Elliott Trudeau Intl

Tue 21/4

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

2 stops11h 43m

C$ 490

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 29/4

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

1 stop14h 41m

Montreal Pierre Elliott Trudeau Intl

Mon 4/5

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

1 stop12h 16m

C$ 525

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 2/5

4:30 p.m.-11:44 a.m.

1 stop18h 14m

Montreal Pierre Elliott Trudeau Intl

Mon 4/5

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

1 stop12h 16m

C$ 578

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 2/5

4:30 p.m.-11:44 a.m.

1 stop18h 14m

Montreal Pierre Elliott Trudeau Intl

Sat 9/5

1:03 p.m.-11:56 p.m.

2 stops11h 53m

C$ 591
Quickest round-trip

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 3/6

6:00 a.m.-4:53 p.m.

1 stop9h 53m

Montreal Pierre Elliott Trudeau Intl

Tue 9/6

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

1 stop9h 00m

C$ 631

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 14/4

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

2 stops11h 43m

Montreal Pierre Elliott Trudeau Intl

Tue 21/4

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

2 stops11h 43m

C$ 676

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 21/4

7:45 a.m.-5:30 p.m.

1 stop8h 45m

Montreal Pierre Elliott Trudeau Intl

Sat 25/4

9:45 a.m.-9:52 p.m.

1 stop13h 07m

C$ 697

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 21/4

7:45 a.m.-6:56 p.m.

1 stop10h 11m

Montreal Pierre Elliott Trudeau Intl

Sat 25/4

9:15 a.m.-9:13 p.m.

2 stops12h 58m

C$ 711

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 3/5

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

1 stop14h 41m

Montreal Pierre Elliott Trudeau Intl

Tue 5/5

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

1 stop12h 16m

C$ 715

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 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?

No. A direct flight is the cheapest option for a flight between St. Louis to Montreal.

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.

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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