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Cheap flights from St. Louis to Montreal from C$ 204

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 30/10. 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

Multiple Airlines Logo
12:20 p.m. - 4:28 p.m.STL-YUL
27h 08m1 stop
Multiple Airlines Logo
4:35 p.m. - 8:45 a.m.YUL-STL
17h 10m1 stop
C$ 505Multiple Airlines
Find Deal
qui, 4 dez - dom, 7 dez
Multiple Airlines Logo
10:57 a.m. - 3:10 p.m.STL-YUL
27h 13m1 stop
Multiple Airlines Logo
2:30 p.m. - 1:57 p.m.YUL-STL
24h 27m2 stops
C$ 517Multiple Airlines
Find Deal
qui, 30 out - qui, 6 nov
Multiple Airlines Logo
9:45 a.m. - 12:30 a.m.STL-YUL
13h 45m1 stop
Multiple Airlines Logo
5:25 p.m. - 11:01 a.m.YUL-STL
18h 36m2 stops
C$ 556Multiple Airlines
Find Deal
sex, 5 dez - sáb, 6 dez
American Airlines Logo
7:16 a.m. - 4:39 p.m.STL-YUL
8h 23m1 stop
American Airlines Logo
3:52 p.m. - 11:56 p.m.YUL-STL
9h 04m1 stop
C$ 561American Airlines
Find Deal
qui, 30 out - qui, 6 nov
American Airlines Logo
7:16 a.m. - 4:39 p.m.STL-YUL
8h 23m1 stop
American Airlines Logo
3:52 p.m. - 11:56 p.m.YUL-STL
9h 04m1 stop
C$ 570American Airlines
Find Deal
qui, 30 out - qui, 6 nov
American Airlines Logo
4:34 p.m. - 11:40 a.m.STL-YUL
18h 06m1 stop
American Airlines Logo
7:30 a.m. - 8:23 p.m.YUL-STL
13h 53m2 stops
C$ 575American Airlines
Find Deal
ter, 21 out - qua, 12 nov
United Airlines Logo
5:00 a.m. - 1:54 p.m.STL-YUL
7h 54m1 stop
United Airlines Logo
8:20 a.m. - 10:35 p.m.YUL-STL
15h 15m1 stop
C$ 718United Airlines
Find Deal
qui, 16 out - sáb, 18 out
Delta Logo
6:00 a.m. - 8:37 a.m.STL-YUL
25h 37m1 stop
Delta Logo
7:30 p.m. - 3:29 p.m.YUL-STL
20h 59m1 stop
C$ 728Delta
Find Deal
dom, 26 out - sex, 31 out
United Airlines Logo
5:28 p.m. - 6:42 p.m.STL-YUL
24h 14m1 stop
United Airlines Logo
6:35 a.m. - 7:42 p.m.YUL-STL
14h 07m2 stops
C$ 730United Airlines
Find Deal
qui, 16 out - sáb, 18 out
Delta Logo
9:31 a.m. - 6:40 p.m.STL-YUL
8h 09m1 stop
Delta Logo
9:26 a.m. - 8:46 p.m.YUL-STL
12h 20m2 stops
C$ 806Delta
Find Deal
ter, 4 nov - ter, 18 nov

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

Our best Delta deals on St. Louis to Montreal Pierre Elliott Trudeau Intl Airport flight tickets
Delta
26 Oct
STL6:00 a.m.Lambert-St Louis
25h 37m
1 stop
YUL8:37 a.m.Montreal Pierre Elliott Trudeau Intl
31 Oct
YUL7:30 p.m.Montreal Pierre Elliott Trudeau Intl
20h 59m
1 stop
STL3:29 p.m.Lambert-St Louis
C$ 728
Find similar
Delta
4 Nov
STL9:31 a.m.Lambert-St Louis
8h 09m
1 stop
YUL6:40 p.m.Montreal Pierre Elliott Trudeau Intl
18 Nov
YUL9:26 a.m.Montreal Pierre Elliott Trudeau Intl
12h 20m
2 stops
STL8:46 p.m.Lambert-St Louis
C$ 806
Find similar
Delta
1 Oct
STL6:05 a.m.Lambert-St Louis
9h 00m
1 stop
YUL4:05 p.m.Montreal Pierre Elliott Trudeau Intl
12 Oct
YUL6:00 a.m.Montreal Pierre Elliott Trudeau Intl
8h 22m
1 stop
STL1:22 p.m.Lambert-St Louis
C$ 968
Find similar

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
30 Oct
STL7:16 a.m.Lambert-St Louis
8h 23m
1 stop
YUL4:39 p.m.Montreal Pierre Elliott Trudeau Intl
6 Nov
YUL3:52 p.m.Montreal Pierre Elliott Trudeau Intl
9h 04m
1 stop
STL11:56 p.m.Lambert-St Louis
C$ 561
Find similar
American Airlines
30 Oct
STL7:16 a.m.Lambert-St Louis
8h 23m
1 stop
YUL4:39 p.m.Montreal Pierre Elliott Trudeau Intl
6 Nov
YUL3:52 p.m.Montreal Pierre Elliott Trudeau Intl
9h 04m
1 stop
STL11:56 p.m.Lambert-St Louis
C$ 570
Find similar
American Airlines
21 Oct
STL4:34 p.m.Lambert-St Louis
18h 06m
1 stop
YUL11:40 a.m.Montreal Pierre Elliott Trudeau Intl
12 Nov
YUL7:30 a.m.Montreal Pierre Elliott Trudeau Intl
13h 53m
2 stops
STL8:23 p.m.Lambert-St Louis
C$ 575
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 17 setembro 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

qui 4/12

12:20 p.m.-4:28 p.m.

1 stop27h 08m

Montreal Pierre Elliott Trudeau Intl

dom 7/12

4:35 p.m.-8:45 a.m.

1 stop17h 10m

C$ 505

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

qui 30/10

10:57 a.m.-3:10 p.m.

1 stop27h 13m

Montreal Pierre Elliott Trudeau Intl

qui 6/11

2:30 p.m.-1:57 p.m.

2 stops24h 27m

C$ 517

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

sex 5/12

9:45 a.m.-12:30 a.m.

1 stop13h 45m

Montreal Pierre Elliott Trudeau Intl

sáb 6/12

5:25 p.m.-11:01 a.m.

2 stops18h 36m

C$ 556

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

qui 30/10

7:16 a.m.-4:39 p.m.

1 stop8h 23m

Montreal Pierre Elliott Trudeau Intl

qui 6/11

3:52 p.m.-11:56 p.m.

1 stop9h 04m

C$ 561

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

qui 30/10

7:16 a.m.-4:39 p.m.

1 stop8h 23m

Montreal Pierre Elliott Trudeau Intl

qui 6/11

3:52 p.m.-11:56 p.m.

1 stop9h 04m

C$ 570

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

ter 21/10

4:34 p.m.-11:40 a.m.

1 stop18h 06m

Montreal Pierre Elliott Trudeau Intl

qua 12/11

7:30 a.m.-8:23 p.m.

2 stops13h 53m

C$ 575

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

qui 16/10

5:00 a.m.-1:54 p.m.

1 stop7h 54m

Montreal Pierre Elliott Trudeau Intl

sáb 18/10

8:20 a.m.-10:35 p.m.

1 stop15h 15m

C$ 718

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

dom 26/10

6:00 a.m.-8:37 a.m.

1 stop25h 37m

Montreal Pierre Elliott Trudeau Intl

sex 31/10

7:30 p.m.-3:29 p.m.

1 stop20h 59m

C$ 728

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

qui 16/10

5:28 p.m.-6:42 p.m.

1 stop24h 14m

Montreal Pierre Elliott Trudeau Intl

sáb 18/10

6:35 a.m.-7:42 p.m.

2 stops14h 07m

C$ 730

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

ter 4/11

9:31 a.m.-6:40 p.m.

1 stop8h 09m

Montreal Pierre Elliott Trudeau Intl

ter 18/11

9:26 a.m.-8:46 p.m.

2 stops12h 20m

C$ 806

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 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$ 437. 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$ 490.

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?

You could potentially save up to 60% 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

Fastest flight time

2h 30m

Direct flights

Mon, Tue, Wed, Thu and Sat
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 on Monday, Tuesday, Wednesday, Thursday and Saturday. There are no airlines offering direct flights.
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  • 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. 4h 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
Magog
Longueuil
North Hatley
Dorval
Bromont
Saint-Sauveur
Saint-Jean-sur-Richelieu
Boucherville
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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