What is the cheapest airline that flies from Lambert-St Louis to Montreal?

American Airlines is the most popular carrier operating from Lambert-St Louis to Montreal

When did momondo last update prices for flights from Lambert-St Louis Airport to Montreal?

Prices for flights from Lambert-St Louis Airport to Montreal were last updated today.

How old do you have to be to fly from Lambert-St Louis Airport to Montreal?

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.

What documentation or ID do you need to fly to Montreal?

The necessary travel and health documents for your Montreal 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.

C$ 215 Cheap Flights from St. Louis to Montreal in 2025/26

1 adult

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Find the cheapest flights from St. Louis to Montreal

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:11 p.m. - 12:30 a.m.

STL

YUL

30h 19m1 stop

8:00 a.m. - 10:23 a.m.

YUL

STL

27h 23m2 stops

C$ 504Multiple Airlines

Sat, 17 Jan - Thu, 22 Jan

6:00 a.m. - 3:08 p.m.

STL

YUL

8h 08m1 stop

3:55 p.m. - 9:29 a.m.

YUL

STL

18h 34m1 stop

C$ 537American Airlines

Tue, 20 Jan - Tue, 17 Feb

6:33 p.m. - 3:05 p.m.

STL

YUL

19h 32m1 stop

3:55 p.m. - 9:29 a.m.

YUL

STL

18h 34m1 stop

C$ 548American Airlines

Thu, 26 Feb - Mon, 2 Mar

6:00 a.m. - 10:44 p.m.

STL

YUL

15h 44m2 stops

3:55 p.m. - 9:29 a.m.

YUL

STL

18h 34m1 stop

C$ 550American Airlines

Tue, 20 Jan - Tue, 17 Feb

6:44 p.m. - 3:08 p.m.

STL

YUL

19h 24m1 stop

3:50 p.m. - 10:20 a.m.

YUL

STL

19h 30m1 stop

C$ 670American Airlines

Sun, 18 Jan - Sun, 25 Jan

6:00 a.m. - 3:08 p.m.

STL

YUL

8h 08m1 stop

3:50 p.m. - 10:20 a.m.

YUL

STL

19h 30m1 stop

C$ 738American Airlines

Thu, 22 Jan - Thu, 29 Jan

6:33 p.m. - 3:03 p.m.

STL

YUL

19h 30m1 stop

3:55 p.m. - 9:02 a.m.

YUL

STL

18h 07m1 stop

C$ 740American Airlines

Wed, 18 Mar - Tue, 24 Mar

10:04 a.m. - 10:44 p.m.

STL

YUL

11h 40m2 stops

3:55 p.m. - 9:29 a.m.

YUL

STL

18h 34m1 stop

C$ 748American Airlines

Thu, 26 Feb - Mon, 2 Mar

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

STL

YUL

4h 47m1 stop

8:50 a.m. - 3:29 p.m.

YUL

STL

7h 39m2 stops

C$ 749Air Canada

Sat, 17 Jan - Sun, 18 Jan

6:00 a.m. - 3:03 p.m.

STL

YUL

8h 03m1 stop

7:30 a.m. - 6:01 p.m.

YUL

STL

11h 31m2 stops

C$ 753American Airlines

Wed, 18 Mar - Tue, 24 Mar

American Airlines flights from St. Louis to Montreal

Our best American Airlines deals on St. Louis to Montreal flight tickets

American Airlines

20 Jan

STL6:00 a.m.Lambert-St Louis

8h 08m

1 stop

YUL3:08 p.m.Montreal Pierre Elliott Trudeau Intl

17 Feb

YUL3:55 p.m.Montreal Pierre Elliott Trudeau Intl

18h 34m

1 stop

STL9:29 a.m.Lambert-St Louis

C$ 537

Find similar

American Airlines

26 Feb

STL6:33 p.m.Lambert-St Louis

19h 32m

1 stop

YUL3:05 p.m.Montreal Pierre Elliott Trudeau Intl

2 Mar

YUL3:55 p.m.Montreal Pierre Elliott Trudeau Intl

18h 34m

1 stop

STL9:29 a.m.Lambert-St Louis

C$ 548

Find similar

American Airlines

20 Jan

STL6:00 a.m.Lambert-St Louis

15h 44m

2 stops

YUL10:44 p.m.Montreal Pierre Elliott Trudeau Intl

17 Feb

YUL3:55 p.m.Montreal Pierre Elliott Trudeau Intl

18h 34m

1 stop

STL9:29 a.m.Lambert-St Louis

C$ 550

Find similar

Delta flights from St. Louis to Montreal

Our best Delta deals on St. Louis to Montreal flight tickets

Delta

22 Jan

STL6:00 a.m.Lambert-St Louis

9h 55m

1 stop

YUL4:55 p.m.Montreal Pierre Elliott Trudeau Intl

29 Jan

YUL9:34 a.m.Montreal Pierre Elliott Trudeau Intl

12h 03m

2 stops

STL8:37 p.m.Lambert-St Louis

C$ 819

Find similar

Delta

17 Jan

STL6:10 a.m.Lambert-St Louis

6h 32m

1 stop

YUL1:42 p.m.Montreal Pierre Elliott Trudeau Intl

20 Jan

YUL9:34 a.m.Montreal Pierre Elliott Trudeau Intl

12h 03m

2 stops

STL8:37 p.m.Lambert-St Louis

C$ 822

Find similar

Delta

8 Jan

STL6:35 a.m.Lambert-St Louis

4h 29m

1 stop

YUL12:04 p.m.Montreal Pierre Elliott Trudeau Intl

15 Jan

YUL9:34 a.m.Montreal Pierre Elliott Trudeau Intl

12h 09m

2 stops

STL8:43 p.m.Lambert-St Louis

C$ 827

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 17/1

5:11 p.m.-12:30 a.m.

1 stop30h 19m

Montreal Pierre Elliott Trudeau Intl

Thu 22/1

8:00 a.m.-10:23 a.m.

2 stops27h 23m

C$ 504

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 20/1

6:00 a.m.-3:08 p.m.

1 stop8h 08m

Montreal Pierre Elliott Trudeau Intl

Tue 17/2

3:55 p.m.-9:29 a.m.

1 stop18h 34m

C$ 537

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 26/2

6:33 p.m.-3:05 p.m.

1 stop19h 32m

Montreal Pierre Elliott Trudeau Intl

Mon 2/3

3:55 p.m.-9:29 a.m.

1 stop18h 34m

C$ 548

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 20/1

6:00 a.m.-10:44 p.m.

2 stops15h 44m

Montreal Pierre Elliott Trudeau Intl

Tue 17/2

3:55 p.m.-9:29 a.m.

1 stop18h 34m

C$ 550

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 18/1

6:44 p.m.-3:08 p.m.

1 stop19h 24m

Montreal Pierre Elliott Trudeau Intl

Sun 25/1

3:50 p.m.-10:20 a.m.

1 stop19h 30m

C$ 670

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 22/1

6:00 a.m.-3:08 p.m.

1 stop8h 08m

Montreal Pierre Elliott Trudeau Intl

Thu 29/1

3:50 p.m.-10:20 a.m.

1 stop19h 30m

C$ 738

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 18/3

6:33 p.m.-3:03 p.m.

1 stop19h 30m

Montreal Pierre Elliott Trudeau Intl

Tue 24/3

3:55 p.m.-9:02 a.m.

1 stop18h 07m

C$ 740

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 26/2

10:04 a.m.-10:44 p.m.

2 stops11h 40m

Montreal Pierre Elliott Trudeau Intl

Mon 2/3

3:55 p.m.-9:29 a.m.

1 stop18h 34m

C$ 748

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 17/1

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

1 stop4h 47m

Montreal Pierre Elliott Trudeau Intl

Sun 18/1

8:50 a.m.-3:29 p.m.

2 stops7h 39m

C$ 749

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 18/3

6:00 a.m.-3:03 p.m.

1 stop8h 03m

Montreal Pierre Elliott Trudeau Intl

Tue 24/3

7:30 a.m.-6:01 p.m.

2 stops11h 31m

C$ 753

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Montreal

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

Prices

Airlines

What is the cheapest Lambert-St Louis to Montreal flight route?

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

What cabin class options are available on Lambert-St Louis to Montreal flights?

There is only 1 cabin class available to choose from on Lambert-St Louis to Montreal 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 flights?

You could potentially save up to 39% on your flight if you consider stops on a St. Louis to Montreal flight.

When to book flights from St. Louis to Montreal

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Montreal according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Montreal (STL to YMQ) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Montreal

Fastest flight time	2h 35m
Direct flights	Sat
Airports in Montreal	2 airports

The fastest flight from St. Louis to Montreal takes 2h 35m

Direct flights go from St. Louis to Montreal on Saturday. There are no airlines offering direct flights.

There are 2 airports in Montreal. From St. Louis there are direct flights to Montreal Pierre Elliott Trudeau Intl (YUL).

Search flight deals

How far is Lambert-St Louis to Montreal by plane?
The straight-line distance from Lambert-St Louis to Montreal is 1566.0 km. Flights usually cover this in 2h 35m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Lambert-St Louis Airport to Montreal?
Prices for flights from Lambert-St Louis Airport to Montreal were last updated today.
How old do you have to be to fly from Lambert-St Louis Airport to Montreal?
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.
What documentation or ID do you need to fly to Montreal?
The necessary travel and health documents for your Montreal 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?
momondo data reveals that the most frequently booked plane model on the route from St. Louis to Montreal is Boeing 787-8 Dreamliner, representing 38.24% of all bookings. The subsequent popular models are Canadair (Bombardier) Regional Jet 900 at 17.65%, Boeing 787-10 Dreamliner at 5.88%, and Airbus A220-300 at 5.88%.

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Montreal from St. Louis.

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?

Once you have performed a search for St. Louis to Montreal flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes momondo offers price alerts on flights to Montreal from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.