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

American Airlines and Delta are the most popular carriers 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 2026

1 adult

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Find the cheapest flights from St. Louis to Montreal

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One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:22 p.m. - 2:54 p.m.

STL

YUL

41h 32m2 stops

4:35 p.m. - 11:33 p.m.

YUL

STL

7h 58m1 stop

C$ 495Multiple Airlines

Wed, 21 Jan - Sat, 24 Jan

6:36 p.m. - 3:04 p.m.

STL

YUL

19h 28m1 stop

3:45 p.m. - 9:33 a.m.

YUL

STL

18h 48m1 stop

C$ 499American Airlines

Wed, 18 Feb - Mon, 23 Feb

6:36 p.m. - 3:04 p.m.

STL

YUL

19h 28m1 stop

3:45 p.m. - 11:48 p.m.

YUL

STL

9h 03m1 stop

C$ 500American Airlines

Thu, 19 Feb - Wed, 25 Feb

10:37 a.m. - 10:56 p.m.

STL

YUL

11h 19m2 stops

3:45 p.m. - 9:33 a.m.

YUL

STL

18h 48m1 stop

C$ 513American Airlines

Wed, 18 Feb - Mon, 23 Feb

6:00 a.m. - 3:04 p.m.

STL

YUL

8h 04m1 stop

12:59 p.m. - 11:48 p.m.

YUL

STL

11h 49m2 stops

C$ 514American Airlines

Thu, 19 Feb - Wed, 25 Feb

9:37 a.m. - 10:56 p.m.

STL

YUL

12h 19m2 stops

12:59 p.m. - 11:48 p.m.

YUL

STL

11h 49m2 stops

C$ 521American Airlines

Thu, 19 Feb - Wed, 25 Feb

3:49 p.m. - 3:10 p.m.

STL

YUL

22h 21m2 stops

4:35 p.m. - 10:27 p.m.

YUL

STL

30h 52m1 stop

C$ 532Multiple Airlines

Wed, 18 Feb - Mon, 23 Feb

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

STL

YUL

11h 18m1 stop

6:45 a.m. - 11:33 p.m.

YUL

STL

41h 48m2 stops

C$ 546Multiple Airlines

Sat, 24 Jan - Tue, 27 Jan

5:42 p.m. - 12:43 a.m.

STL

YUL

30h 01m2 stops

4:35 p.m. - 11:33 p.m.

YUL

STL

7h 58m1 stop

C$ 547Multiple Airlines

Fri, 30 Jan - Sun, 1 Feb

4:05 p.m. - 6:35 a.m.

STL

YUL

13h 30m2 stops

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

YUL

STL

6h 19m1 stop

C$ 561Air Canada

Thu, 26 Feb - Fri, 27 Feb

American Airlines flights from St. Louis to Montreal

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

American Airlines

18 Feb

STL6:36 p.m.Lambert-St Louis

19h 28m

1 stop

YUL3:04 p.m.Montreal Pierre Elliott Trudeau Intl

23 Feb

YUL3:45 p.m.Montreal Pierre Elliott Trudeau Intl

18h 48m

1 stop

STL9:33 a.m.Lambert-St Louis

C$ 499

Find similar

American Airlines

19 Feb

STL6:36 p.m.Lambert-St Louis

19h 28m

1 stop

YUL3:04 p.m.Montreal Pierre Elliott Trudeau Intl

25 Feb

YUL3:45 p.m.Montreal Pierre Elliott Trudeau Intl

9h 03m

1 stop

STL11:48 p.m.Lambert-St Louis

C$ 500

Find similar

American Airlines

18 Feb

STL10:37 a.m.Lambert-St Louis

11h 19m

2 stops

YUL10:56 p.m.Montreal Pierre Elliott Trudeau Intl

23 Feb

YUL3:45 p.m.Montreal Pierre Elliott Trudeau Intl

18h 48m

1 stop

STL9:33 a.m.Lambert-St Louis

C$ 513

Find similar

Delta flights from St. Louis to Montreal

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

Delta

21 Jan

STL6:00 a.m.Lambert-St Louis

11h 37m

2 stops

YUL6:37 p.m.Montreal Pierre Elliott Trudeau Intl

24 Jan

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

12h 09m

2 stops

STL8:43 p.m.Lambert-St Louis

C$ 816

Find similar

Delta

26 Feb

STL6:35 a.m.Lambert-St Louis

11h 00m

2 stops

YUL6:35 p.m.Montreal Pierre Elliott Trudeau Intl

2 Mar

YUL9:29 a.m.Montreal Pierre Elliott Trudeau Intl

12h 14m

2 stops

STL8:43 p.m.Lambert-St Louis

C$ 846

Find similar

Delta

20 Jan

STL6:00 a.m.Lambert-St Louis

11h 37m

2 stops

YUL6:37 p.m.Montreal Pierre Elliott Trudeau Intl

23 Jan

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

8h 05m

1 stop

STL4:39 p.m.Lambert-St Louis

C$ 849

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 21/1

8:22 p.m.-2:54 p.m.

2 stops41h 32m

Montreal Pierre Elliott Trudeau Intl

Sat 24/1

4:35 p.m.-11:33 p.m.

1 stop7h 58m

C$ 495

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 18/2

6:36 p.m.-3:04 p.m.

1 stop19h 28m

Montreal Pierre Elliott Trudeau Intl

Mon 23/2

3:45 p.m.-9:33 a.m.

1 stop18h 48m

C$ 499

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 19/2

6:36 p.m.-3:04 p.m.

1 stop19h 28m

Montreal Pierre Elliott Trudeau Intl

Wed 25/2

3:45 p.m.-11:48 p.m.

1 stop9h 03m

C$ 500

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 18/2

10:37 a.m.-10:56 p.m.

2 stops11h 19m

Montreal Pierre Elliott Trudeau Intl

Mon 23/2

3:45 p.m.-9:33 a.m.

1 stop18h 48m

C$ 513

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 19/2

6:00 a.m.-3:04 p.m.

1 stop8h 04m

Montreal Pierre Elliott Trudeau Intl

Wed 25/2

12:59 p.m.-11:48 p.m.

2 stops11h 49m

C$ 514

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 19/2

9:37 a.m.-10:56 p.m.

2 stops12h 19m

Montreal Pierre Elliott Trudeau Intl

Wed 25/2

12:59 p.m.-11:48 p.m.

2 stops11h 49m

C$ 521

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 18/2

3:49 p.m.-3:10 p.m.

2 stops22h 21m

Montreal Pierre Elliott Trudeau Intl

Mon 23/2

4:35 p.m.-10:27 p.m.

1 stop30h 52m

C$ 532

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 24/1

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

1 stop11h 18m

Montreal Pierre Elliott Trudeau Intl

Tue 27/1

6:45 a.m.-11:33 p.m.

2 stops41h 48m

C$ 546

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 30/1

5:42 p.m.-12:43 a.m.

2 stops30h 01m

Montreal Pierre Elliott Trudeau Intl

Sun 1/2

4:35 p.m.-11:33 p.m.

1 stop7h 58m

C$ 547

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 26/2

4:05 p.m.-6:35 a.m.

2 stops13h 30m

Montreal Pierre Elliott Trudeau Intl

Fri 27/2

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

1 stop6h 19m

C$ 561

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 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 32m
Direct flights	Mon, Tue, Thu, Fri and Sat
Airports in Montreal	2 airports

The fastest flight from St. Louis to Montreal takes 2h 32m

Direct flights go from St. Louis to Montreal on Monday, Tuesday, Thursday, Friday and 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 32m, 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 41.94% of all bookings. The subsequent popular models are Canadair (Bombardier) Regional Jet 900 at 9.68%, Boeing 787-10 Dreamliner at 6.45%, and Airbus A220-300 at 6.45%.

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.