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$ 285 Cheap Flights from St. Louis to Montreal in 2026/27

Find the cheapest flights from St. Louis to Montreal

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:24 p.m. - 11:28 a.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

14h 04m1 stop Chicago O'Hare Intl

12:08 p.m. - 10:17 p.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

11h 09m1 stop Chicago O'Hare Intl

C$ 583American Airlines

Mon, 7 Dec - Wed, 9 Dec

8:12 p.m. - 11:26 a.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

14h 14m1 stop Chicago O'Hare Intl

12:10 p.m. - 7:50 p.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

8h 40m1 stop Chicago O'Hare Intl

C$ 590American Airlines

Tue, 24 Nov - Tue, 1 Dec

8:24 p.m. - 11:28 a.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

14h 04m1 stop Chicago O'Hare Intl

1:04 p.m. - 12:02 a.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

11h 58m2 stops Philadelphia Chicago O'Hare Intl

C$ 597American Airlines

Mon, 7 Dec - Wed, 9 Dec

12:02 p.m. - 4:00 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

26h 58m3 stops Atlanta Hartsfield-Jackson Newark Toronto Island

4:40 p.m. - 11:17 a.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

19h 37m3 stops Toronto Island Newark Atlanta Hartsfield-Jackson

C$ 656Multiple Airlines

Mon, 7 Dec - Thu, 10 Dec

8:12 p.m. - 11:26 a.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

14h 14m1 stop Chicago O'Hare Intl

12:10 p.m. - 7:50 p.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

8h 40m1 stop Chicago O'Hare Intl

C$ 692American Airlines

Mon, 23 Nov - Wed, 25 Nov

5:23 p.m. - 11:28 a.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

17h 05m1 stop Chicago O'Hare Intl

12:08 p.m. - 12:02 a.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

12h 54m1 stop Chicago O'Hare Intl

C$ 695American Airlines

Sat, 5 Dec - Wed, 9 Dec

11:25 a.m. - 10:48 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

10h 23m2 stops Chicago O'Hare Intl Philadelphia

12:08 p.m. - 12:02 a.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

12h 54m1 stop Chicago O'Hare Intl

C$ 709American Airlines

Sat, 5 Dec - Wed, 9 Dec

8:15 p.m. - 11:32 a.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

14h 17m1 stop Chicago O'Hare Intl

1:00 p.m. - 11:57 p.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

11h 57m2 stops Philadelphia Chicago O'Hare Intl

C$ 724American Airlines

Wed, 20 Jan - Sun, 24 Jan

7:21 a.m. - 9:31 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

13h 10m2 stops Chicago O'Hare Intl Philadelphia

1:00 p.m. - 11:57 p.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

11h 57m2 stops Philadelphia Chicago O'Hare Intl

C$ 733American Airlines

Wed, 20 Jan - Sun, 24 Jan

8:24 p.m. - 11:28 a.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

14h 04m1 stop Chicago O'Hare Intl

12:08 p.m. - 12:02 a.m.YUL Montreal Pierre Elliott Trudeau Intl-STL Lambert-St Louis

12h 54m1 stop Chicago O'Hare Intl

C$ 740American Airlines

Fri, 11 Dec - Mon, 14 Dec

Cheap one-way flights

Enter your travel dates to find the best prices.

9:50 a.m. - 10:11 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

11h 21m3 stops Jonesboro Nashville Intl Toronto Island

C$ 285Multiple Airlines

Thu, 10 Dec

3:04 p.m. - 10:10 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

30h 06m3 stops Denver Intl Chicago O'Hare Intl Toronto Island

C$ 295Multiple Airlines

Wed, 25 Nov

3:04 p.m. - 7:05 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

27h 01m3 stops Denver Intl Chicago O'Hare Intl Toronto Island

C$ 317Multiple Airlines

Sat, 21 Nov

12:05 p.m. - 10:17 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

33h 12m3 stops Atlanta Hartsfield-Jackson Newark Toronto Pearson Intl

C$ 320Multiple Airlines

Wed, 2 Dec

6:34 p.m. - 10:10 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

26h 36m3 stops Atlanta Hartsfield-Jackson New York LaGuardia Toronto Island

C$ 331Multiple Airlines

Wed, 18 Nov

8:24 p.m. - 11:28 a.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

14h 04m1 stop Chicago O'Hare Intl

C$ 348American Airlines

Thu, 10 Dec

6:35 p.m. - 12:30 a.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

28h 55m3 stops Atlanta Hartsfield-Jackson Fort Lauderdale Toronto Pearson Intl

C$ 350Multiple Airlines

Mon, 23 Nov

7:24 p.m. - 10:10 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

25h 46m3 stops Atlanta Hartsfield-Jackson Washington, D.C. Dulles Intl Toronto Island

C$ 357Multiple Airlines

Thu, 19 Nov

6:21 p.m. - 7:06 p.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

23h 45m3 stops Atlanta Hartsfield-Jackson Newark Toronto Island

C$ 359Multiple Airlines

Mon, 28 Dec

8:15 p.m. - 11:32 a.m.STL Lambert-St Louis-YUL Montreal Pierre Elliott Trudeau Intl

14h 17m1 stop Chicago O'Hare Intl

C$ 364American Airlines

Thu, 21 Jan

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American Airlines flights from St. Louis to Montreal

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

American Airlines

7 Dec

STL8:24 p.m.Lambert-St Louis

14h 04m

1 stop

YUL11:28 a.m.Montreal Pierre Elliott Trudeau Intl

9 Dec

YUL12:08 p.m.Montreal Pierre Elliott Trudeau Intl

11h 09m

1 stop

STL10:17 p.m.Lambert-St Louis

C$ 583

American Airlines

24 Nov

STL8:12 p.m.Lambert-St Louis

14h 14m

1 stop

YUL11:26 a.m.Montreal Pierre Elliott Trudeau Intl

1 Dec

YUL12:10 p.m.Montreal Pierre Elliott Trudeau Intl

8h 40m

1 stop

STL7:50 p.m.Lambert-St Louis

C$ 590

American Airlines

7 Dec

STL8:24 p.m.Lambert-St Louis

14h 04m

1 stop

YUL11:28 a.m.Montreal Pierre Elliott Trudeau Intl

9 Dec

YUL1:04 p.m.Montreal Pierre Elliott Trudeau Intl

11h 58m

2 stops

STL12:02 a.m.Lambert-St Louis

C$ 597

Delta flights from St. Louis to Montreal

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

Delta

5 Dec

STL2:00 p.m.Lambert-St Louis

22h 35m

1 stop

YUL1:35 p.m.Montreal Pierre Elliott Trudeau Intl

9 Dec

YUL7:44 p.m.Montreal Pierre Elliott Trudeau Intl

14h 08m

1 stop

STL8:52 a.m.Lambert-St Louis

C$ 906

Delta

4 Dec

STL6:05 p.m.Lambert-St Louis

13h 43m

2 stops

YUL8:48 a.m.Montreal Pierre Elliott Trudeau Intl

8 Dec

YUL7:44 p.m.Montreal Pierre Elliott Trudeau Intl

14h 08m

1 stop

STL8:52 a.m.Lambert-St Louis

C$ 950

Delta

10 Nov

STL3:30 p.m.Lambert-St Louis

7h 00m

1 stop

YUL11:30 p.m.Montreal Pierre Elliott Trudeau Intl

16 Nov

YUL12:50 p.m.Montreal Pierre Elliott Trudeau Intl

5h 24m

1 stop

STL5:14 p.m.Lambert-St Louis

C$ 1,291

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisMontreal

STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl

STLYUL

Lambert-St Louis

Mon 7/12

8:24 p.m.-11:28 a.m.

1 stop14h 04m

Montreal Pierre Elliott Trudeau Intl

Wed 9/12

12:08 p.m.-10:17 p.m.

1 stop11h 09m

C$ 583

Quickest round-trip

St. LouisMontreal

STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl

STLYUL

Lambert-St Louis

Tue 24/11

8:12 p.m.-11:26 a.m.

1 stop14h 14m

Montreal Pierre Elliott Trudeau Intl

Tue 1/12

12:10 p.m.-7:50 p.m.

1 stop8h 40m

C$ 590

St. LouisMontreal

STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl

STLYUL

Lambert-St Louis

Mon 7/12

8:24 p.m.-11:28 a.m.

1 stop14h 04m

Montreal Pierre Elliott Trudeau Intl

Wed 9/12

1:04 p.m.-12:02 a.m.

2 stops11h 58m

C$ 597

St. LouisMontreal

STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl

STLYUL

Lambert-St Louis

Mon 7/12

12:02 p.m.-4:00 p.m.

3 stops26h 58m

Montreal Pierre Elliott Trudeau Intl

Thu 10/12

4:40 p.m.-11:17 a.m.

3 stops19h 37m

C$ 656

St. LouisMontreal

STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl

STLYUL

Lambert-St Louis

Mon 23/11

8:12 p.m.-11:26 a.m.

1 stop14h 14m

Montreal Pierre Elliott Trudeau Intl

Wed 25/11

12:10 p.m.-7:50 p.m.

1 stop8h 40m

C$ 692

St. LouisMontreal

STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl

STLYUL

Lambert-St Louis

Sat 5/12

5:23 p.m.-11:28 a.m.

1 stop17h 05m

Montreal Pierre Elliott Trudeau Intl

Wed 9/12

12:08 p.m.-12:02 a.m.

1 stop12h 54m

C$ 695

St. LouisMontreal

STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl

STLYUL

Lambert-St Louis

Sat 5/12

11:25 a.m.-10:48 p.m.

2 stops10h 23m

Montreal Pierre Elliott Trudeau Intl

Wed 9/12

12:08 p.m.-12:02 a.m.

1 stop12h 54m

C$ 709

St. LouisMontreal

STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl

STLYUL

Lambert-St Louis

Wed 20/1

8:15 p.m.-11:32 a.m.

1 stop14h 17m

Montreal Pierre Elliott Trudeau Intl

Sun 24/1

1:00 p.m.-11:57 p.m.

2 stops11h 57m

C$ 724

St. LouisMontreal

STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl

STLYUL

Lambert-St Louis

Wed 20/1

7:21 a.m.-9:31 p.m.

2 stops13h 10m

Montreal Pierre Elliott Trudeau Intl

Sun 24/1

1:00 p.m.-11:57 p.m.

2 stops11h 57m

C$ 733

St. LouisMontreal

STL Lambert-St Louis - YUL Montreal Pierre Elliott Trudeau Intl

STLYUL

Lambert-St Louis

Fri 11/12

8:24 p.m.-11:28 a.m.

1 stop14h 04m

Montreal Pierre Elliott Trudeau Intl

Mon 14/12

12:08 p.m.-12:02 a.m.

1 stop12h 54m

C$ 740

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 month to fly to Montreal?

The cheapest month to fly to Montreal from St. Louis is in August. Flight prices, which tend to average around C$ 639, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of August, then book flights to Montreal from St. Louis during February instead. Flights to Montreal in February, while not as cheap as those in August, still average around C$ 708.

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 St. Louis to Montreal flights?

There is only 1 cabin class available to choose from on 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.

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

Best price found	C$ 285
Fastest flight time	5h 23m
Direct flights	None

The best one-way flight to Montreal from St. Louis in the past 72 hours is C$ 285. The best round-trip flight deal from St. Louis to Montreal found on momondo in the last 72 hours is C$ 583.

The fastest flight from St. Louis to Montreal takes 5h 23m

There are no direct flights from St. Louis to Montreal. There are no popular flight routes from St. Louis to Montreal.

Search flight deals

Frequently asked questions about flying from St. Louis to Montreal

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 5h 23m, 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 Canadair (Bombardier) Regional Jet 900, representing 54.90% of all bookings. The subsequent popular models are Boeing 787-8 Dreamliner at 21.57%, Embraer 175 at 11.76%, and Airbus A330-300 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.

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Complete your trip

Feeling lucky

Fly into one of these airports located in Montreal

MET - Montreal Metropolitan Airport

Montreal Pierre Elliott Trudeau Intl Airport

Cheap flights from St. Louis to Montreal from C$ 285

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Montreal departing on 10/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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American Airlines flights from St. Louis to Montreal

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

Delta flights from St. Louis to Montreal

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

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See travel insights to Montreal from

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

What is the cheapest month to fly to Montreal?

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

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

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

When to book flights from St. Louis to Montreal

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

Best price found

Fastest flight time

Direct flights

Frequently asked questions about flying from St. Louis to Montreal

Why use momondo?

An easier way to manage your Montreal trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Canada

Fly into one of these airports located in Montreal

Airports listed have a maximum distance of 15.1 km from Montreal

Cabin classes currently available on flights to Montreal

List of cabin classes available on flights landing in Montreal. Availability may vary depending on flight origin and airline.

Popular Cities in Canada

Popular flights according to clicks in the last 7 days on momondo

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According to popular flight searches on momondo this year

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