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$ 255 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

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:46 p.m. - 11:44 a.m.

STL

YUL

17h 58m

1 stop

12:30 p.m. - 10:14 p.m.

YUL

STL

10h 44m

1 stop

C$ 466American Airlines

Tue, 7 Apr - Thu, 9 Apr

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

STL

YUL

8h 04m

1 stop

3:45 p.m. - 10:13 a.m.

YUL

STL

19h 28m

1 stop

C$ 500American Airlines

Tue, 17 Feb - Fri, 20 Feb

8:24 a.m. - 12:30 a.m.

STL

YUL

15h 06m

1 stop

5:10 p.m. - 11:25 p.m.

YUL

STL

31h 15m

2 stops

C$ 573Multiple Airlines

Fri, 3 Apr - Mon, 6 Apr

4:55 p.m. - 12:30 a.m.

STL

YUL

30h 35m

1 stop

5:10 p.m. - 6:50 a.m.

YUL

STL

14h 40m

2 stops

C$ 593Multiple Airlines

Wed, 22 Apr - Sun, 26 Apr

11:32 a.m. - 4:20 p.m.

STL

YUL

27h 48m

2 stops

4:35 p.m. - 6:57 a.m.

YUL

STL

15h 22m

1 stop

C$ 645Multiple Airlines

Wed, 18 Mar - Sat, 28 Mar

9:37 a.m. - 2:58 p.m.

STL

YUL

4h 21m

1 stop

12:30 p.m. - 10:14 p.m.

YUL

STL

10h 44m

1 stop

C$ 653American Airlines

Mon, 6 Apr - Thu, 9 Apr

6:14 a.m. - 3:20 p.m.

STL

YUL

8h 06m

1 stop

3:45 p.m. - 10:03 a.m.

YUL

STL

19h 18m

1 stop

C$ 660American Airlines

Sat, 21 Mar - Tue, 24 Mar

6:54 p.m. - 1:52 p.m.

STL

YUL

17h 58m

1 stop

12:30 p.m. - 10:14 p.m.

YUL

STL

10h 44m

1 stop

C$ 661American Airlines

Fri, 1 May - Mon, 4 May

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

STL

YUL

19h 32m

1 stop

7:30 a.m. - 5:58 p.m.

YUL

STL

11h 28m

2 stops

C$ 673American Airlines

Sat, 21 Mar - Tue, 24 Mar

8:24 a.m. - 12:30 a.m.

STL

YUL

15h 06m

1 stop

4:35 p.m. - 7:51 a.m.

YUL

STL

16h 16m

1 stop

C$ 695Multiple Airlines

Fri, 3 Apr - Sun, 5 Apr

American Airlines flights from St. Louis to Montreal

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

American Airlines

7 Apr

STL4:46 p.m.Lambert-St Louis

17h 58m

1 stop

YUL11:44 a.m.Montreal Pierre Elliott Trudeau Intl

9 Apr

YUL12:30 p.m.Montreal Pierre Elliott Trudeau Intl

10h 44m

1 stop

STL10:14 p.m.Lambert-St Louis

C$ 466

American Airlines

17 Feb

STL6:00 a.m.Lambert-St Louis

8h 04m

1 stop

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

20 Feb

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

19h 28m

1 stop

STL10:13 a.m.Lambert-St Louis

C$ 500

American Airlines

6 Apr

STL9:37 a.m.Lambert-St Louis

4h 21m

1 stop

YUL2:58 p.m.Montreal Pierre Elliott Trudeau Intl

9 Apr

YUL12:30 p.m.Montreal Pierre Elliott Trudeau Intl

10h 44m

1 stop

STL10:14 p.m.Lambert-St Louis

C$ 653

Delta flights from St. Louis to Montreal

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

Delta

18 Mar

STL9:41 a.m.Lambert-St Louis

7h 54m

1 stop

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

28 Mar

YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl

10h 07m

1 stop

STL4:07 p.m.Lambert-St Louis

C$ 741

Delta

2 Apr

STL10:12 a.m.Lambert-St Louis

6h 19m

1 stop

YUL5:31 p.m.Montreal Pierre Elliott Trudeau Intl

5 Apr

YUL6:00 a.m.Montreal Pierre Elliott Trudeau Intl

4h 46m

1 stop

STL9:46 a.m.Lambert-St Louis

C$ 806

Delta

7 Apr

STL6:00 a.m.Lambert-St Louis

11h 35m

2 stops

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

9 Apr

YUL6:00 a.m.Montreal Pierre Elliott Trudeau Intl

7h 58m

1 stop

STL12:58 p.m.Lambert-St Louis

C$ 867

Fly from

Fly to

Route

Depart

Return

Price

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 7/4

4:46 p.m.-11:44 a.m.

1 stop17h 58m

Montreal Pierre Elliott Trudeau Intl

Thu 9/4

12:30 p.m.-10:14 p.m.

1 stop10h 44m

C$ 466

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 17/2

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

1 stop8h 04m

Montreal Pierre Elliott Trudeau Intl

Fri 20/2

3:45 p.m.-10:13 a.m.

1 stop19h 28m

C$ 500

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 3/4

8:24 a.m.-12:30 a.m.

1 stop15h 06m

Montreal Pierre Elliott Trudeau Intl

Mon 6/4

5:10 p.m.-11:25 p.m.

2 stops31h 15m

C$ 573

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 22/4

4:55 p.m.-12:30 a.m.

1 stop30h 35m

Montreal Pierre Elliott Trudeau Intl

Sun 26/4

5:10 p.m.-6:50 a.m.

2 stops14h 40m

C$ 593

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 18/3

11:32 a.m.-4:20 p.m.

2 stops27h 48m

Montreal Pierre Elliott Trudeau Intl

Sat 28/3

4:35 p.m.-6:57 a.m.

1 stop15h 22m

C$ 645

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 6/4

9:37 a.m.-2:58 p.m.

1 stop4h 21m

Montreal Pierre Elliott Trudeau Intl

Thu 9/4

12:30 p.m.-10:14 p.m.

1 stop10h 44m

C$ 653

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 21/3

6:14 a.m.-3:20 p.m.

1 stop8h 06m

Montreal Pierre Elliott Trudeau Intl

Tue 24/3

3:45 p.m.-10:03 a.m.

1 stop19h 18m

C$ 660

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 1/5

6:54 p.m.-1:52 p.m.

1 stop17h 58m

Montreal Pierre Elliott Trudeau Intl

Mon 4/5

12:30 p.m.-10:14 p.m.

1 stop10h 44m

C$ 661

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 21/3

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

1 stop19h 32m

Montreal Pierre Elliott Trudeau Intl

Tue 24/3

7:30 a.m.-5:58 p.m.

2 stops11h 28m

C$ 673

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 3/4

8:24 a.m.-12:30 a.m.

1 stop15h 06m

Montreal Pierre Elliott Trudeau Intl

Sun 5/4

4:35 p.m.-7:51 a.m.

1 stop16h 16m

C$ 695

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 32m
Direct flights	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 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 39.29% of all bookings. The subsequent popular models are Boeing 787-10 Dreamliner at 7.14%, Airbus A220-300 at 7.14%, and Canadair (Bombardier) Regional Jet 900 at 7.14%.

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.