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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 15/11. 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

American Airlines Logo
6:10 a.m. - 4:33 p.m.STL-YUL
9h 23m1 stop
American Airlines Logo
5:15 p.m. - 9:26 a.m.YUL-STL
17h 11m1 stop
C$ 482American Airlines
Find Deal
Wed, 10 Sep - Mon, 15 Sep
American Airlines Logo
5:25 p.m. - 4:33 p.m.STL-YUL
22h 08m1 stop
American Airlines Logo
10:34 a.m. - 9:53 p.m.YUL-STL
12h 19m2 stops
C$ 495American Airlines
Find Deal
Sat, 13 Sep - Sat, 20 Sep
Logo
12:20 p.m. - 12:45 a.m.STL-YUL
11h 25m1 stop
Logo
6:45 a.m. - 12:00 p.m.YUL-STL
30h 15m3 stops
C$ 659
Find Deal
Thu, 6 Nov - Sun, 9 Nov
Air Canada Logo
1:30 p.m. - 5:00 p.m.STL-YUL
2h 30mdirect
Air Canada Logo
9:15 a.m. - 3:18 p.m.YUL-STL
7h 03m1 stop
C$ 720Air Canada
Find Deal
Wed, 10 Sep - Wed, 17 Sep
Delta Logo
10:45 a.m. - 9:47 p.m.STL-YUL
10h 02m2 stops
Delta Logo
11:00 a.m. - 8:05 p.m.YUL-STL
10h 05m1 stop
C$ 729Delta
Find Deal
Wed, 10 Sep - Wed, 17 Sep
Logo
2:30 p.m. - 12:05 p.m.STL-YUL
20h 35m3 stops
Logo
6:45 a.m. - 12:00 p.m.YUL-STL
30h 15m3 stops
C$ 731
Find Deal
Sun, 31 Aug - Thu, 4 Sep
Air Canada Logo
4:05 p.m. - 9:52 p.m.STL-YUL
4h 47m1 stop
Air Canada Logo
11:10 a.m. - 3:29 p.m.YUL-STL
5h 19m1 stop
C$ 736Air Canada
Find Deal
Thu, 6 Nov - Mon, 10 Nov
United Airlines Logo
3:23 p.m. - 10:40 a.m.STL-YUL
18h 17m1 stop
United Airlines Logo
8:20 a.m. - 10:49 a.m.YUL-STL
27h 29m1 stop
C$ 756United Airlines
Find Deal
Tue, 14 Oct - Sun, 19 Oct
United Airlines Logo
3:20 p.m. - 5:26 p.m.STL-YUL
25h 06m1 stop
United Airlines Logo
8:00 p.m. - 3:44 p.m.YUL-STL
20h 44m2 stops
C$ 769United Airlines
Find Deal
Mon, 1 Sep - Fri, 5 Sep
Delta Logo
10:45 a.m. - 9:47 p.m.STL-YUL
10h 02m2 stops
Delta Logo
11:00 a.m. - 8:34 p.m.YUL-STL
10h 34m2 stops
C$ 804Delta
Find Deal
Wed, 10 Sep - Wed, 17 Sep

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
10 Sep
STL6:10 a.m.Lambert-St Louis
9h 23m
1 stop
YUL4:33 p.m.Montreal Pierre Elliott Trudeau Intl
15 Sep
YUL5:15 p.m.Montreal Pierre Elliott Trudeau Intl
17h 11m
1 stop
STL9:26 a.m.Lambert-St Louis
C$ 482
Find similar
American Airlines
13 Sep
STL5:25 p.m.Lambert-St Louis
22h 08m
1 stop
YUL4:33 p.m.Montreal Pierre Elliott Trudeau Intl
20 Sep
YUL10:34 a.m.Montreal Pierre Elliott Trudeau Intl
12h 19m
2 stops
STL9:53 p.m.Lambert-St Louis
C$ 495
Find similar
American Airlines
5 Sep
STL7:23 a.m.Lambert-St Louis
8h 07m
1 stop
YUL4:30 p.m.Montreal Pierre Elliott Trudeau Intl
8 Sep
YUL5:15 p.m.Montreal Pierre Elliott Trudeau Intl
17h 11m
1 stop
STL9:26 a.m.Lambert-St Louis
C$ 523
Find similar

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
10 Sep
STL1:30 p.m.Lambert-St Louis
2h 30m
YUL5:00 p.m.Montreal Pierre Elliott Trudeau Intl
17 Sep
YUL9:15 a.m.Montreal Pierre Elliott Trudeau Intl
7h 03m
1 stop
STL3:18 p.m.Lambert-St Louis
C$ 720
Find similar
Air Canada
6 Nov
STL4:05 p.m.Lambert-St Louis
4h 47m
1 stop
YUL9:52 p.m.Montreal Pierre Elliott Trudeau Intl
10 Nov
YUL11:10 a.m.Montreal Pierre Elliott Trudeau Intl
5h 19m
1 stop
STL3:29 p.m.Lambert-St Louis
C$ 736
Find similar
Air Canada
1 Sep
STL1:30 p.m.Lambert-St Louis
2h 30m
YUL5:00 p.m.Montreal Pierre Elliott Trudeau Intl
5 Sep
YUL6:10 p.m.Montreal Pierre Elliott Trudeau Intl
2h 47m
STL7:57 p.m.Lambert-St Louis
C$ 761
Find similar

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 31 July 2025.
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

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 10/9

6:10 a.m.-4:33 p.m.

1 stop9h 23m

Montreal Pierre Elliott Trudeau Intl

Mon 15/9

5:15 p.m.-9:26 a.m.

1 stop17h 11m

C$ 482

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 13/9

5:25 p.m.-4:33 p.m.

1 stop22h 08m

Montreal Pierre Elliott Trudeau Intl

Sat 20/9

10:34 a.m.-9:53 p.m.

2 stops12h 19m

C$ 495

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 6/11

12:20 p.m.-12:45 a.m.

1 stop11h 25m

Montreal Pierre Elliott Trudeau Intl

Sun 9/11

6:45 a.m.-12:00 p.m.

3 stops30h 15m

C$ 659

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 10/9

1:30 p.m.-5:00 p.m.

Nonstop2h 30m

Montreal Pierre Elliott Trudeau Intl

Wed 17/9

9:15 a.m.-3:18 p.m.

1 stop7h 03m

C$ 720

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 10/9

10:45 a.m.-9:47 p.m.

2 stops10h 02m

Montreal Pierre Elliott Trudeau Intl

Wed 17/9

11:00 a.m.-8:05 p.m.

1 stop10h 05m

C$ 729

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 31/8

2:30 p.m.-12:05 p.m.

3 stops20h 35m

Montreal Pierre Elliott Trudeau Intl

Thu 4/9

6:45 a.m.-12:00 p.m.

3 stops30h 15m

C$ 731

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 6/11

4:05 p.m.-9:52 p.m.

1 stop4h 47m

Montreal Pierre Elliott Trudeau Intl

Mon 10/11

11:10 a.m.-3:29 p.m.

1 stop5h 19m

C$ 736

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 14/10

3:23 p.m.-10:40 a.m.

1 stop18h 17m

Montreal Pierre Elliott Trudeau Intl

Sun 19/10

8:20 a.m.-10:49 a.m.

1 stop27h 29m

C$ 756

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 1/9

3:20 p.m.-5:26 p.m.

1 stop25h 06m

Montreal Pierre Elliott Trudeau Intl

Fri 5/9

8:00 p.m.-3:44 p.m.

2 stops20h 44m

C$ 769

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 10/9

10:45 a.m.-9:47 p.m.

2 stops10h 02m

Montreal Pierre Elliott Trudeau Intl

Wed 17/9

11:00 a.m.-8:34 p.m.

2 stops10h 34m

C$ 804

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 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 cheapest month to fly to Montreal Pierre Elliott Trudeau Intl Airport?

The month of October is, on average, the cheapest month to fly to Montreal Pierre Elliott Trudeau Intl Airport from St. Louis, with most prices found around C$ 401. The month of July is another great option to travel to Montreal Pierre Elliott Trudeau Intl Airport, with average flight prices from St. Louis averaging around C$ 493.

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 are 1 cabin classes 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?

You could potentially save up to 45% on your flight if you consider stops on a St. Louis to Montreal Pierre Elliott Trudeau Intl Airport flight.

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

Best price found

C$ 198

Fastest flight time

2h 30m

Direct flights

Every day
The best one-way flight to Montreal Pierre Elliott Trudeau Intl Airport from St. Louis in the past 72 hours is C$ 198. The best round-trip flight deal from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport found on momondo in the last 72 hours is C$ 482.
The fastest flight from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport takes 2h 30m
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 30m 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
Montebello
Trois-Rivières
Sherbrooke
Brossard
Cornwall
Drummondville
Longueuil
Dorval
Magog
Bromont
Saint-Sauveur
Saint-Jean-sur-Richelieu
Boucherville
North Hatley
Sutton
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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