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

Delta, United Airlines, and Air Canada 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$ 337 Cheap Flights from St. Louis to Montreal in 2026

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.

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

STL

YUL

19h 28m

1 stop

3:45 p.m. - 8:41 a.m.

YUL

STL

17h 56m

1 stop

C$ 496American Airlines

Wed, 18 Feb - Mon, 23 Feb

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

STL

YUL

11h 19m

2 stops

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

YUL

STL

18h 48m

1 stop

C$ 510American Airlines

Wed, 18 Feb - Mon, 23 Feb

3:49 p.m. - 12:30 a.m.

STL

YUL

7h 41m

1 stop

5:25 p.m. - 11:41 a.m.

YUL

STL

19h 16m

2 stops

C$ 561Multiple Airlines

Mon, 23 Feb - Fri, 27 Feb

10:42 a.m. - 12:30 a.m.

STL

YUL

12h 48m

2 stops

4:35 p.m. - 7:13 a.m.

YUL

STL

15h 38m

1 stop

C$ 598Multiple Airlines

Thu, 9 Apr - Sun, 12 Apr

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

STL

YUL

8h 04m

1 stop

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

YUL

STL

9h 03m

1 stop

C$ 622American Airlines

Thu, 19 Feb - Mon, 23 Feb

5:42 p.m. - 12:30 a.m.

STL

YUL

29h 48m

1 stop

4:35 p.m. - 9:21 a.m.

YUL

STL

17h 46m

1 stop

C$ 633Multiple Airlines

Thu, 5 Feb - Sun, 8 Feb

6:55 p.m. - 10:20 a.m.

STL

YUL

14h 25m

1 stop

1:10 p.m. - 10:36 a.m.

YUL

STL

22h 26m

1 stop

C$ 640United Airlines

Mon, 23 Feb - Fri, 27 Feb

5:42 p.m. - 8:14 p.m.

STL

YUL

25h 32m

2 stops

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

YUL

STL

7h 58m

1 stop

C$ 659Multiple Airlines

Thu, 5 Feb - Sun, 8 Feb

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

STL

YUL

19h 28m

1 stop

7:12 a.m. - 7:30 p.m.

YUL

STL

13h 18m

1 stop

C$ 673American Airlines

Wed, 18 Feb - Sun, 22 Feb

3:30 p.m. - 12:30 a.m.

STL

YUL

8h 00m

1 stop

4:35 p.m. - 7:13 a.m.

YUL

STL

15h 38m

1 stop

C$ 675Multiple Airlines

Thu, 9 Apr - Sun, 12 Apr

United Airlines flights from St. Louis to Montreal

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

United Airlines

28 Feb

STL9:55 a.m.Lambert-St Louis

10h 22m

1 stop

YUL9:17 p.m.Montreal Pierre Elliott Trudeau Intl

7 Mar

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

9h 43m

1 stop

STL2:43 p.m.Lambert-St Louis

C$ 739

United Airlines

28 Feb

STL9:55 a.m.Lambert-St Louis

10h 22m

1 stop

YUL9:17 p.m.Montreal Pierre Elliott Trudeau Intl

7 Mar

YUL10:25 a.m.Montreal Pierre Elliott Trudeau Intl

12h 16m

2 stops

STL9:41 p.m.Lambert-St Louis

C$ 791

United Airlines

12 Mar

STL7:41 a.m.Lambert-St Louis

9h 59m

1 stop

YUL6:40 p.m.Montreal Pierre Elliott Trudeau Intl

16 Mar

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

16h 36m

2 stops

STL10:36 a.m.Lambert-St Louis

C$ 808

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

17h 56m

1 stop

STL8:41 a.m.Lambert-St Louis

C$ 496

American Airlines

17 Feb

STL6:31 p.m.Lambert-St Louis

19h 33m

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$ 498

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$ 510

Fly from

Fly to

Route

Depart

Return

Price

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.-8:41 a.m.

1 stop17h 56m

C$ 496

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$ 510

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 23/2

3:49 p.m.-12:30 a.m.

1 stop7h 41m

Montreal Pierre Elliott Trudeau Intl

Fri 27/2

5:25 p.m.-11:41 a.m.

2 stops19h 16m

C$ 561

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 9/4

10:42 a.m.-12:30 a.m.

2 stops12h 48m

Montreal Pierre Elliott Trudeau Intl

Sun 12/4

4:35 p.m.-7:13 a.m.

1 stop15h 38m

C$ 598

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

Mon 23/2

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

1 stop9h 03m

C$ 622

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 5/2

5:42 p.m.-12:30 a.m.

1 stop29h 48m

Montreal Pierre Elliott Trudeau Intl

Sun 8/2

4:35 p.m.-9:21 a.m.

1 stop17h 46m

C$ 633

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 23/2

6:55 p.m.-10:20 a.m.

1 stop14h 25m

Montreal Pierre Elliott Trudeau Intl

Fri 27/2

1:10 p.m.-10:36 a.m.

1 stop22h 26m

C$ 640

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 5/2

5:42 p.m.-8:14 p.m.

2 stops25h 32m

Montreal Pierre Elliott Trudeau Intl

Sun 8/2

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

1 stop7h 58m

C$ 659

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

Sun 22/2

7:12 a.m.-7:30 p.m.

1 stop13h 18m

C$ 673

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 9/4

3:30 p.m.-12:30 a.m.

1 stop8h 00m

Montreal Pierre Elliott Trudeau Intl

Sun 12/4

4:35 p.m.-7:13 a.m.

1 stop15h 38m

C$ 675

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	Mon, Tue, Thu and Fri
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 and Friday. 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.