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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.
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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. - 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$ 609American Airlines
Wed, 3 Jun - Tue, 9 Jun
Multiple Airlines Logo
4:59 p.m. - 12:30 a.m.
STL
-
YUL
30h 31m
1 stop
Multiple Airlines Logo
8:00 a.m. - 6:50 a.m.
YUL
-
STL
23h 50m
2 stops
C$ 611Multiple Airlines
Tue, 21 Apr - Sun, 26 Apr
American Airlines Logo
6:00 a.m. - 4:53 p.m.
STL
-
YUL
9h 53m
1 stop
American Airlines Logo
5:33 p.m. - 8:32 a.m.
YUL
-
STL
15h 59m
1 stop
C$ 633American Airlines
Wed, 3 Jun - Tue, 9 Jun
Multiple Airlines Logo
4:59 p.m. - 12:30 a.m.
STL
-
YUL
30h 31m
1 stop
Multiple Airlines Logo
6:45 a.m. - 6:50 a.m.
YUL
-
STL
25h 05m
2 stops
C$ 637Multiple Airlines
Tue, 21 Apr - Tue, 28 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$ 699United Airlines
Tue, 21 Apr - Sat, 25 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. - 11:46 p.m.
YUL
-
STL
12h 16m
1 stop
C$ 701American Airlines
Tue, 28 Apr - Thu, 30 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$ 717American Airlines
Sun, 3 May - Tue, 5 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. - 10:17 p.m.
YUL
-
STL
10h 47m
1 stop
C$ 730American Airlines
Mon, 4 May - Wed, 6 May
Multiple Airlines Logo
4:59 p.m. - 12:30 a.m.
STL
-
YUL
30h 31m
1 stop
Multiple Airlines Logo
4:25 p.m. - 6:50 a.m.
YUL
-
STL
15h 25m
2 stops
C$ 736Multiple Airlines
Tue, 28 Apr - Thu, 30 Apr
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$ 744American Airlines
Mon, 4 May - Wed, 6 May

American Airlines flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport

Our best American Airlines deals on St. Louis to Montreal Pierre Elliott Trudeau Intl Airport flight tickets
American Airlines
3 Jun
STL6:00 a.m.Lambert-St Louis
9h 53m
1 stop
YUL4:53 p.m.Montreal Pierre Elliott Trudeau Intl
9 Jun
YUL12:30 p.m.Montreal Pierre Elliott Trudeau Intl
9h 00m
1 stop
STL8:30 p.m.Lambert-St Louis
C$ 609
American Airlines
3 Jun
STL6:00 a.m.Lambert-St Louis
9h 53m
1 stop
YUL4:53 p.m.Montreal Pierre Elliott Trudeau Intl
9 Jun
YUL5:33 p.m.Montreal Pierre Elliott Trudeau Intl
15h 59m
1 stop
STL8:32 a.m.Lambert-St Louis
C$ 633
American Airlines
28 Apr
STL5:21 p.m.Lambert-St Louis
17h 23m
1 stop
YUL11:44 a.m.Montreal Pierre Elliott Trudeau Intl
30 Apr
YUL12:30 p.m.Montreal Pierre Elliott Trudeau Intl
12h 16m
1 stop
STL11:46 p.m.Lambert-St Louis
C$ 701

Air Canada flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport

Our best Air Canada deals on St. Louis to Montreal Pierre Elliott Trudeau Intl Airport 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$ 776
Air Canada
1 May
STL1:00 p.m.Lambert-St Louis
2h 35m
YUL4:35 p.m.Montreal Pierre Elliott Trudeau Intl
3 May
YUL6:30 p.m.Montreal Pierre Elliott Trudeau Intl
2h 55m
STL8:25 p.m.Lambert-St Louis
C$ 778
Air Canada
1 May
STL1:00 p.m.Lambert-St Louis
2h 35m
YUL4:35 p.m.Montreal Pierre Elliott Trudeau Intl
3 May
YUL4:10 p.m.Montreal Pierre Elliott Trudeau Intl
4h 59m
1 stop
STL8:09 p.m.Lambert-St Louis
C$ 783

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport 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 25 March 2026.
Use the filters below to find and compare flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
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$ 609

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 21/4

4:59 p.m.-12:30 a.m.

1 stop30h 31m

Montreal Pierre Elliott Trudeau Intl

Sun 26/4

8:00 a.m.-6:50 a.m.

2 stops23h 50m

C$ 611

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

5:33 p.m.-8:32 a.m.

1 stop15h 59m

C$ 633

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 21/4

4:59 p.m.-12:30 a.m.

1 stop30h 31m

Montreal Pierre Elliott Trudeau Intl

Tue 28/4

6:45 a.m.-6:50 a.m.

2 stops25h 05m

C$ 637

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$ 699

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 28/4

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

1 stop17h 23m

Montreal Pierre Elliott Trudeau Intl

Thu 30/4

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

1 stop12h 16m

C$ 701

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$ 717

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 4/5

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

1 stop14h 41m

Montreal Pierre Elliott Trudeau Intl

Wed 6/5

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

1 stop10h 47m

C$ 730

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 28/4

4:59 p.m.-12:30 a.m.

1 stop30h 31m

Montreal Pierre Elliott Trudeau Intl

Thu 30/4

4:25 p.m.-6:50 a.m.

2 stops15h 25m

C$ 736

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 4/5

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

1 stop14h 41m

Montreal Pierre Elliott Trudeau Intl

Wed 6/5

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

2 stops11h 43m

C$ 744

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 Pierre Elliott Trudeau Intl Airport

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 Pierre Elliott Trudeau Intl Airport?

What is the cheapest Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl flight route?

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

What cabin class options are available on Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl flights?

There is only 1 cabin class available to choose from on Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl 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 Pierre Elliott Trudeau Intl Airport flights?

No. A direct flight is the cheapest option for a flight between St. Louis to Montreal Pierre Elliott Trudeau Intl Airport.

When to book flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport

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

Cheap St. Louis to Montreal Pierre Elliott Trudeau Intl Airport (STL to YUL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport

Fastest flight time

2h 32m

Direct flights

Every day
The fastest flight from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport takes 2h 32m
Direct flights go from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport every day.
Search flight deals

  • How far is Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl by plane?

    The distance between Lambert-St Louis and Montreal Pierre Elliott Trudeau Intl is about 1551.0 km. 2h 32m is a normal flight duration for this route.

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

    Prices for flights from Lambert-St Louis Airport to Montreal Pierre Elliott Trudeau Intl Airport are updated daily.

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

    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 Pierre Elliott Trudeau Intl Airport.

  • What documentation or ID do you need to fly to Montreal Pierre Elliott Trudeau Intl Airport?

    The necessary travel and health documents for your Montreal Pierre Elliott Trudeau Intl Airport 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 Pierre Elliott Trudeau Intl Airport?

Travelling to a place near Montreal?

Book flights to Montreal if you plan to visit one of these locations
Laval
Trois-Rivières
Montebello
Sherbrooke
Brossard
Longueuil
Dorval
Cornwall
Boucherville
North Hatley
Magog
Saint-Sauveur
Drummondville
Bromont
Sutton
Saint-Jean-sur-Richelieu
Waterloo

Why use momondo?

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

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 St. Louis to Montreal for you.

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?

momondo helps you find the best flight between St. Louis and Montreal by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Of course. momondo tracks the price of St. Louis to Montreal flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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