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

American Airlines and United Airlines 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$ 150 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.

10:09 p.m. - 7:05 a.m.

STL

YUL

31h 56m2 stops

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

YUL

STL

17h 46m1 stop

C$ 425Multiple Airlines

Sun, 18 Jan - Sun, 25 Jan

8:22 p.m. - 3:10 p.m.

STL

YUL

17h 48m2 stops

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

YUL

STL

17h 46m1 stop

C$ 477Multiple Airlines

Wed, 21 Jan - Sun, 25 Jan

10:06 a.m. - 12:30 a.m.

STL

YUL

13h 24m1 stop

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

YUL

STL

29h 26m2 stops

C$ 482Multiple Airlines

Sun, 18 Jan - Fri, 23 Jan

10:06 a.m. - 12:30 a.m.

STL

YUL

13h 24m1 stop

8:00 a.m. - 11:33 p.m.

YUL

STL

40h 33m2 stops

C$ 484Multiple Airlines

Sun, 18 Jan - Wed, 28 Jan

10:06 a.m. - 12:30 a.m.

STL

YUL

13h 24m1 stop

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

YUL

STL

17h 46m1 stop

C$ 509Multiple Airlines

Sun, 18 Jan - Sun, 25 Jan

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

STL

YUL

30h 01m2 stops

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

YUL

STL

17h 46m1 stop

C$ 535Multiple Airlines

Tue, 20 Jan - Sun, 25 Jan

10:06 a.m. - 12:30 a.m.

STL

YUL

13h 24m1 stop

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

YUL

STL

17h 48m2 stops

C$ 542Multiple Airlines

Sun, 18 Jan - Mon, 26 Jan

1:35 p.m. - 7:05 a.m.

STL

YUL

16h 30m2 stops

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

YUL

STL

17h 46m1 stop

C$ 555Multiple Airlines

Fri, 16 Jan - Sun, 25 Jan

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

STL

YUL

8h 08m1 stop

3:50 p.m. - 9:34 a.m.

YUL

STL

18h 44m1 stop

C$ 582American Airlines

Wed, 4 Feb - Wed, 11 Feb

1:35 p.m. - 7:05 a.m.

STL

YUL

16h 30m2 stops

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

YUL

STL

17h 46m1 stop

C$ 585Multiple Airlines

Thu, 15 Jan - Sun, 25 Jan

American Airlines flights from St. Louis to Montreal

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

American Airlines

4 Feb

STL6:00 a.m.Lambert-St Louis

8h 08m

1 stop

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

11 Feb

YUL3:50 p.m.Montreal Pierre Elliott Trudeau Intl

18h 44m

1 stop

STL9:34 a.m.Lambert-St Louis

C$ 582

Find similar

American Airlines

26 Feb

STL6:00 a.m.Lambert-St Louis

8h 05m

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$ 589

Find similar

American Airlines

18 Jan

STL6:44 p.m.Lambert-St Louis

19h 24m

1 stop

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

25 Jan

YUL3:50 p.m.Montreal Pierre Elliott Trudeau Intl

19h 30m

1 stop

STL10:20 a.m.Lambert-St Louis

C$ 741

Find similar

Delta flights from St. Louis to Montreal

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

Delta

20 Jan

STL5:32 p.m.Lambert-St Louis

14h 12m

1 stop

YUL8:44 a.m.Montreal Pierre Elliott Trudeau Intl

28 Jan

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

11h 32m

1 stop

STL8:06 p.m.Lambert-St Louis

C$ 709

Find similar

Delta

18 Jan

STL5:32 p.m.Lambert-St Louis

14h 12m

1 stop

YUL8:44 a.m.Montreal Pierre Elliott Trudeau Intl

26 Jan

YUL7:30 p.m.Montreal Pierre Elliott Trudeau Intl

18h 03m

1 stop

STL12:33 p.m.Lambert-St Louis

C$ 745

Find similar

Delta

17 Jan

STL1:20 p.m.Lambert-St Louis

23h 02m

1 stop

YUL1:22 p.m.Montreal Pierre Elliott Trudeau Intl

23 Jan

YUL7:30 p.m.Montreal Pierre Elliott Trudeau Intl

18h 06m

1 stop

STL12:36 p.m.Lambert-St Louis

C$ 748

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 18/1

10:09 p.m.-7:05 a.m.

2 stops31h 56m

Montreal Pierre Elliott Trudeau Intl

Sun 25/1

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

1 stop17h 46m

C$ 425

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 21/1

8:22 p.m.-3:10 p.m.

2 stops17h 48m

Montreal Pierre Elliott Trudeau Intl

Sun 25/1

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

1 stop17h 46m

C$ 477

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 18/1

10:06 a.m.-12:30 a.m.

1 stop13h 24m

Montreal Pierre Elliott Trudeau Intl

Fri 23/1

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

2 stops29h 26m

C$ 482

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 18/1

10:06 a.m.-12:30 a.m.

1 stop13h 24m

Montreal Pierre Elliott Trudeau Intl

Wed 28/1

8:00 a.m.-11:33 p.m.

2 stops40h 33m

C$ 484

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 18/1

10:06 a.m.-12:30 a.m.

1 stop13h 24m

Montreal Pierre Elliott Trudeau Intl

Sun 25/1

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

1 stop17h 46m

C$ 509

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 20/1

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

2 stops30h 01m

Montreal Pierre Elliott Trudeau Intl

Sun 25/1

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

1 stop17h 46m

C$ 535

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 18/1

10:06 a.m.-12:30 a.m.

1 stop13h 24m

Montreal Pierre Elliott Trudeau Intl

Mon 26/1

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

2 stops17h 48m

C$ 542

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 16/1

1:35 p.m.-7:05 a.m.

2 stops16h 30m

Montreal Pierre Elliott Trudeau Intl

Sun 25/1

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

1 stop17h 46m

C$ 555

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 4/2

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

1 stop8h 08m

Montreal Pierre Elliott Trudeau Intl

Wed 11/2

3:50 p.m.-9:34 a.m.

1 stop18h 44m

C$ 582

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 15/1

1:35 p.m.-7:05 a.m.

2 stops16h 30m

Montreal Pierre Elliott Trudeau Intl

Sun 25/1

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

1 stop17h 46m

C$ 585

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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	Thu and 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 Thursday 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 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.