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Cheap flights from St. Louis to Montreal from C$ 237

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 8/6. 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.
Air Canada Logo
1:05 p.m. - 4:40 p.m.
STL
-
YUL
2h 35mdirect
Air Canada Logo
6:30 p.m. - 8:25 p.m.
YUL
-
STL
2h 55mdirect
C$ 634Air Canada
Thu, 28 May - Mon, 1 Jun
Air Canada Logo
1:05 p.m. - 4:40 p.m.
STL
-
YUL
2h 35mdirect
Air Canada Logo
6:30 p.m. - 8:25 p.m.
YUL
-
STL
2h 55mdirect
C$ 643Air Canada
Thu, 28 May - Mon, 1 Jun
Air Canada Logo
1:05 p.m. - 4:40 p.m.
STL
-
YUL
2h 35mdirect
Air Canada Logo
2:10 p.m. - 8:09 p.m.
YUL
-
STL
6h 59m
1 stop
C$ 647Air Canada
Thu, 28 May - Mon, 1 Jun
Air Canada Logo
7:05 a.m. - 3:26 p.m.
STL
-
YUL
7h 21m
2 stops
Air Canada Logo
6:30 p.m. - 8:25 p.m.
YUL
-
STL
2h 55mdirect
C$ 651Air Canada
Thu, 28 May - Mon, 1 Jun
Air Canada Logo
1:05 p.m. - 4:40 p.m.
STL
-
YUL
2h 35mdirect
Air Canada Logo
8:10 a.m. - 12:06 p.m.
YUL
-
STL
4h 56m
1 stop
C$ 652Air Canada
Thu, 28 May - Mon, 1 Jun
Air Canada Logo
7:05 a.m. - 3:26 p.m.
STL
-
YUL
7h 21m
2 stops
Air Canada Logo
4:10 p.m. - 8:09 p.m.
YUL
-
STL
4h 59m
1 stop
C$ 655Air Canada
Thu, 28 May - Mon, 1 Jun
Air Canada Logo
7:05 a.m. - 10:19 p.m.
STL
-
YUL
14h 14m
2 stops
Air Canada Logo
6:30 p.m. - 8:25 p.m.
YUL
-
STL
2h 55mdirect
C$ 670Air Canada
Thu, 28 May - Sun, 31 May
Multiple Airlines Logo
7:20 p.m. - 6:15 p.m.
STL
-
YUL
21h 55m
3 stops
Multiple Airlines Logo
6:30 a.m. - 6:36 p.m.
YUL
-
STL
13h 06m
3 stops
C$ 673Multiple Airlines
Thu, 28 May - Mon, 1 Jun
Multiple Airlines Logo
7:05 a.m. - 3:26 p.m.
STL
-
YUL
7h 21m
2 stops
Multiple Airlines Logo
6:30 a.m. - 6:36 p.m.
YUL
-
STL
13h 06m
3 stops
C$ 686Multiple Airlines
Thu, 28 May - Mon, 1 Jun
Air Canada Logo
2:15 p.m. - 11:31 p.m.
STL
-
YUL
8h 16m
1 stop
Air Canada Logo
6:00 a.m. - 12:06 p.m.
YUL
-
STL
7h 06m
1 stop
C$ 689Air Canada
Thu, 28 May - Mon, 1 Jun

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
27 Jun
STL6:30 a.m.Lambert-St Louis
8h 50m
1 stop
YUL4:20 p.m.Montreal Pierre Elliott Trudeau Intl
29 Jun
YUL6:50 p.m.Montreal Pierre Elliott Trudeau Intl
6h 06m
1 stop
STL11:56 p.m.Lambert-St Louis
C$ 814
Delta
22 May
STL1:27 p.m.Lambert-St Louis
9h 30m
1 stop
YUL11:57 p.m.Montreal Pierre Elliott Trudeau Intl
24 May
YUL12:49 p.m.Montreal Pierre Elliott Trudeau Intl
5h 27m
1 stop
STL5:16 p.m.Lambert-St Louis
C$ 939
Delta
13 May
STL5:45 p.m.Lambert-St Louis
13h 54m
1 stop
YUL8:39 a.m.Montreal Pierre Elliott Trudeau Intl
17 May
YUL6:00 a.m.Montreal Pierre Elliott Trudeau Intl
4h 29m
1 stop
STL9:29 a.m.Lambert-St Louis
C$ 1,330

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
28 May
STL1:05 p.m.Lambert-St Louis
2h 35m
YUL4:40 p.m.Montreal Pierre Elliott Trudeau Intl
1 Jun
YUL6:30 p.m.Montreal Pierre Elliott Trudeau Intl
2h 55m
STL8:25 p.m.Lambert-St Louis
C$ 634
Air Canada
28 May
STL1:05 p.m.Lambert-St Louis
2h 35m
YUL4:40 p.m.Montreal Pierre Elliott Trudeau Intl
1 Jun
YUL6:30 p.m.Montreal Pierre Elliott Trudeau Intl
2h 55m
STL8:25 p.m.Lambert-St Louis
C$ 643
Air Canada
28 May
STL1:05 p.m.Lambert-St Louis
2h 35m
YUL4:40 p.m.Montreal Pierre Elliott Trudeau Intl
1 Jun
YUL2:10 p.m.Montreal Pierre Elliott Trudeau Intl
6h 59m
1 stop
STL8:09 p.m.Lambert-St Louis
C$ 647

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 10 May 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

Thu 28/5

1:05 p.m.-4:40 p.m.

Nonstop2h 35m

Montreal Pierre Elliott Trudeau Intl

Mon 1/6

6:30 p.m.-8:25 p.m.

Nonstop2h 55m

C$ 634

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 28/5

1:05 p.m.-4:40 p.m.

Nonstop2h 35m

Montreal Pierre Elliott Trudeau Intl

Mon 1/6

6:30 p.m.-8:25 p.m.

Nonstop2h 55m

C$ 643

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 28/5

1:05 p.m.-4:40 p.m.

Nonstop2h 35m

Montreal Pierre Elliott Trudeau Intl

Mon 1/6

2:10 p.m.-8:09 p.m.

1 stop6h 59m

C$ 647

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 28/5

7:05 a.m.-3:26 p.m.

2 stops7h 21m

Montreal Pierre Elliott Trudeau Intl

Mon 1/6

6:30 p.m.-8:25 p.m.

Nonstop2h 55m

C$ 651

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 28/5

1:05 p.m.-4:40 p.m.

Nonstop2h 35m

Montreal Pierre Elliott Trudeau Intl

Mon 1/6

8:10 a.m.-12:06 p.m.

1 stop4h 56m

C$ 652

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 28/5

7:05 a.m.-3:26 p.m.

2 stops7h 21m

Montreal Pierre Elliott Trudeau Intl

Mon 1/6

4:10 p.m.-8:09 p.m.

1 stop4h 59m

C$ 655

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 28/5

7:05 a.m.-10:19 p.m.

2 stops14h 14m

Montreal Pierre Elliott Trudeau Intl

Sun 31/5

6:30 p.m.-8:25 p.m.

Nonstop2h 55m

C$ 670

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 28/5

7:20 p.m.-6:15 p.m.

3 stops21h 55m

Montreal Pierre Elliott Trudeau Intl

Mon 1/6

6:30 a.m.-6:36 p.m.

3 stops13h 06m

C$ 673

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 28/5

7:05 a.m.-3:26 p.m.

2 stops7h 21m

Montreal Pierre Elliott Trudeau Intl

Mon 1/6

6:30 a.m.-6:36 p.m.

3 stops13h 06m

C$ 686

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 28/5

2:15 p.m.-11:31 p.m.

1 stop8h 16m

Montreal Pierre Elliott Trudeau Intl

Mon 1/6

6:00 a.m.-12:06 p.m.

1 stop7h 06m

C$ 689

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 July is another great option to travel to Montreal Pierre Elliott Trudeau Intl Airport, with average flight prices from St. Louis averaging around C$ 446.

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

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

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 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
Sherbrooke
Montebello
Brossard
Dorval
Longueuil
Cornwall
North Hatley
Boucherville
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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