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Cheap flights from St. Louis to Montreal from C$ 292

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 14/8. 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
1 adult, Economy, 0 bags

Find the cheapest flights from St. Louis to Montreal

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
7:00 a.m. - 7:05 a.m.
STL
-
YUL
23h 05m
2 stops
WestJet Logo
6:00 a.m. - 4:38 p.m.
YUL
-
STL
11h 38m
1 stop
C$ 713WestJet
Mon, 31 Aug - Wed, 2 Sep
American Airlines Logo
6:00 a.m. - 4:53 p.m.
STL
-
YUL
9h 53m
1 stop
American Airlines Logo
5:34 p.m. - 8:24 a.m.
YUL
-
STL
15h 50m
1 stop
C$ 723American Airlines
Tue, 18 Aug - Fri, 21 Aug
Multiple Airlines Logo
4:57 p.m. - 6:15 p.m.
STL
-
YUL
24h 18m
2 stops
Multiple Airlines Logo
6:47 p.m. - 11:53 p.m.
YUL
-
STL
6h 06m
1 stop
C$ 751Multiple Airlines
Fri, 24 Jul - Wed, 29 Jul
American Airlines Logo
3:20 p.m. - 9:48 a.m.
STL
-
YUL
17h 28m
1 stop
American Airlines Logo
12:30 p.m. - 12:16 a.m.
YUL
-
STL
12h 46m
1 stop
C$ 754American Airlines
Wed, 8 Jul - Wed, 15 Jul
Multiple Airlines Logo
6:17 p.m. - 6:15 p.m.
STL
-
YUL
22h 58m
2 stops
Multiple Airlines Logo
6:00 a.m. - 9:37 a.m.
YUL
-
STL
4h 37m
1 stop
C$ 757Multiple Airlines
Mon, 24 Aug - Fri, 28 Aug
Multiple Airlines Logo
4:57 p.m. - 6:15 p.m.
STL
-
YUL
24h 18m
2 stops
Multiple Airlines Logo
6:47 p.m. - 11:58 p.m.
YUL
-
STL
6h 11m
1 stop
C$ 758Multiple Airlines
Fri, 14 Aug - Mon, 17 Aug
Multiple Airlines Logo
4:57 p.m. - 6:15 p.m.
STL
-
YUL
24h 18m
2 stops
Multiple Airlines Logo
6:47 p.m. - 11:58 p.m.
YUL
-
STL
6h 11m
1 stop
C$ 761Multiple Airlines
Fri, 14 Aug - Mon, 17 Aug
Multiple Airlines Logo
4:57 p.m. - 6:15 p.m.
STL
-
YUL
24h 18m
2 stops
Multiple Airlines Logo
6:47 p.m. - 11:58 p.m.
YUL
-
STL
6h 11m
1 stop
C$ 763Multiple Airlines
Fri, 14 Aug - Mon, 17 Aug
Multiple Airlines Logo
4:57 p.m. - 6:15 p.m.
STL
-
YUL
24h 18m
2 stops
Multiple Airlines Logo
6:47 p.m. - 11:58 p.m.
YUL
-
STL
6h 11m
1 stop
C$ 764Multiple Airlines
Fri, 14 Aug - Mon, 17 Aug
Multiple Airlines Logo
4:57 p.m. - 6:15 p.m.
STL
-
YUL
24h 18m
2 stops
Multiple Airlines Logo
6:00 a.m. - 9:31 a.m.
YUL
-
STL
4h 31m
1 stop
C$ 766Multiple Airlines
Mon, 20 Jul - Sat, 25 Jul

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

Our best WestJet deals on St. Louis to Montreal Pierre Elliott Trudeau Intl Airport flight tickets
WestJet
31 Aug
STL7:00 a.m.Lambert-St Louis
23h 05m
2 stops
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
2 Sep
YUL6:00 a.m.Montreal Pierre Elliott Trudeau Intl
11h 38m
1 stop
STL4:38 p.m.Lambert-St Louis
C$ 713
WestJet
14 Aug
STL6:25 p.m.Lambert-St Louis
4h 05m
1 stop
YUL11:30 p.m.Montreal Pierre Elliott Trudeau Intl
17 Aug
YUL6:47 p.m.Montreal Pierre Elliott Trudeau Intl
6h 11m
1 stop
STL11:58 p.m.Lambert-St Louis
C$ 880
WestJet
14 Aug
STL6:25 p.m.Lambert-St Louis
4h 05m
1 stop
YUL11:30 p.m.Montreal Pierre Elliott Trudeau Intl
17 Aug
YUL6:47 p.m.Montreal Pierre Elliott Trudeau Intl
6h 11m
1 stop
STL11:58 p.m.Lambert-St Louis
C$ 883

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
1 Sep
STL6:00 a.m.Lambert-St Louis
11h 54m
2 stops
YUL6:54 p.m.Montreal Pierre Elliott Trudeau Intl
4 Sep
YUL2:29 p.m.Montreal Pierre Elliott Trudeau Intl
7h 02m
1 stop
STL8:31 p.m.Lambert-St Louis
C$ 886
Delta
25 Sep
STL4:59 p.m.Lambert-St Louis
5h 58m
1 stop
YUL11:57 p.m.Montreal Pierre Elliott Trudeau Intl
27 Sep
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
9h 54m
1 stop
STL3:54 p.m.Lambert-St Louis
C$ 894
Delta
28 Jun
STL6:00 a.m.Lambert-St Louis
11h 54m
2 stops
YUL6:54 p.m.Montreal Pierre Elliott Trudeau Intl
3 Jul
YUL9:30 a.m.Montreal Pierre Elliott Trudeau Intl
12h 09m
2 stops
STL8:39 p.m.Lambert-St Louis
C$ 1,402

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 21 June 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

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 31/8

7:00 a.m.-7:05 a.m.

2 stops23h 05m

Montreal Pierre Elliott Trudeau Intl

Wed 2/9

6:00 a.m.-4:38 p.m.

1 stop11h 38m

C$ 713
Quickest round-trip

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 18/8

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

1 stop9h 53m

Montreal Pierre Elliott Trudeau Intl

Fri 21/8

5:34 p.m.-8:24 a.m.

1 stop15h 50m

C$ 723

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 24/7

4:57 p.m.-6:15 p.m.

2 stops24h 18m

Montreal Pierre Elliott Trudeau Intl

Wed 29/7

6:47 p.m.-11:53 p.m.

1 stop6h 06m

C$ 751

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 8/7

3:20 p.m.-9:48 a.m.

1 stop17h 28m

Montreal Pierre Elliott Trudeau Intl

Wed 15/7

12:30 p.m.-12:16 a.m.

1 stop12h 46m

C$ 754

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 24/8

6:17 p.m.-6:15 p.m.

2 stops22h 58m

Montreal Pierre Elliott Trudeau Intl

Fri 28/8

6:00 a.m.-9:37 a.m.

1 stop4h 37m

C$ 757

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 14/8

4:57 p.m.-6:15 p.m.

2 stops24h 18m

Montreal Pierre Elliott Trudeau Intl

Mon 17/8

6:47 p.m.-11:58 p.m.

1 stop6h 11m

C$ 758

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 14/8

4:57 p.m.-6:15 p.m.

2 stops24h 18m

Montreal Pierre Elliott Trudeau Intl

Mon 17/8

6:47 p.m.-11:58 p.m.

1 stop6h 11m

C$ 761

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 14/8

4:57 p.m.-6:15 p.m.

2 stops24h 18m

Montreal Pierre Elliott Trudeau Intl

Mon 17/8

6:47 p.m.-11:58 p.m.

1 stop6h 11m

C$ 763

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 14/8

4:57 p.m.-6:15 p.m.

2 stops24h 18m

Montreal Pierre Elliott Trudeau Intl

Mon 17/8

6:47 p.m.-11:58 p.m.

1 stop6h 11m

C$ 764

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 20/7

4:57 p.m.-6:15 p.m.

2 stops24h 18m

Montreal Pierre Elliott Trudeau Intl

Sat 25/7

6:00 a.m.-9:31 a.m.

1 stop4h 31m

C$ 766

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 month to fly to Montreal Pierre Elliott Trudeau Intl Airport?

The month of February is, on average, the cheapest month to fly to Montreal Pierre Elliott Trudeau Intl Airport from St. Louis, with most prices found around C$ 0. The month of December is another great option to travel to Montreal Pierre Elliott Trudeau Intl Airport, with average flight prices from St. Louis averaging around C$ 798.

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 St. Louis to Montreal Pierre Elliott Trudeau Intl Airport flights?

There is only 1 cabin class available to choose from on St. Louis to Montreal Pierre Elliott Trudeau Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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 31m

Direct flights

Every day
The fastest flight from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport takes 2h 31m
Direct flights go from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport every day.
Search flight deals

Frequently asked questions about flying from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport

  • 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 31m 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
Sherbrooke
Brossard
Montebello
Dorval
Longueuil
Cornwall
Boucherville
North Hatley
Drummondville
Saint-Sauveur
Magog
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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