How many flights depart from St. Louis to Montreal on average per day?

As of July 2026, there are 2 flights per day flying from St. Louis to Montreal. The most common time of day flights depart is 12:00p.m., with 100% of flights taking off in the afternoon.

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

How many flights depart from St. Louis to Montreal on average per week?

14 flights are operational weekly from St. Louis to Montreal as of July 2026. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.

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$ 341 Cheap Flights from St. Louis to Montreal in 2026

Q: What is the typical price of a round-trip flight between St. Louis and Montreal?

Prices are currently low for flights on this route. Typical prices usually range from C$ 826 to C$ 948. The lowest price recently found on this route was C$ 764.

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.

6:00 a.m. - 4:50 p.m.

STL

YUL

9h 50m

1 stop

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

YUL

STL

12h 44m

1 stop

C$ 764American Airlines

Wed, 12 Aug - Wed, 19 Aug

4:54 p.m. - 11:43 a.m.

STL

YUL

17h 49m

1 stop

5:34 p.m. - 8:24 a.m.

YUL

STL

15h 50m

1 stop

C$ 795American Airlines

Tue, 18 Aug - Fri, 21 Aug

4:57 p.m. - 6:15 p.m.

STL

YUL

24h 18m

2 stops

6:51 p.m. - 11:21 p.m.

YUL

STL

5h 30m

1 stop

C$ 806Multiple Airlines

Fri, 31 Jul - Wed, 5 Aug

3:20 p.m. - 9:48 a.m.

STL

YUL

17h 28m

1 stop

12:30 p.m. - 12:16 a.m.

YUL

STL

12h 46m

1 stop

C$ 818American Airlines

Tue, 28 Jul - Wed, 29 Jul

6:17 p.m. - 2:08 p.m.

STL

YUL

18h 51m

2 stops

6:00 a.m. - 9:37 a.m.

YUL

STL

4h 37m

1 stop

C$ 823Multiple Airlines

Fri, 28 Aug - Sun, 6 Sep

6:55 a.m. - 4:47 p.m.

STL

YUL

8h 52m

1 stop

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

YUL

STL

12h 44m

1 stop

C$ 828American Airlines

Wed, 29 Jul - Wed, 5 Aug

9:00 a.m. - 2:12 p.m.

STL

YUL

28h 12m

2 stops

6:00 a.m. - 8:37 p.m.

YUL

STL

15h 37m

1 stop

C$ 835WestJet

Fri, 4 Dec - Sun, 6 Dec

5:10 a.m. - 10:56 p.m.

STL

YUL

16h 46m

1 stop

7:29 a.m. - 6:59 p.m.

YUL

STL

12h 30m

1 stop

C$ 836American Airlines

Mon, 3 Aug - Thu, 6 Aug

4:57 p.m. - 2:08 p.m.

STL

YUL

20h 11m

2 stops

6:51 p.m. - 11:21 p.m.

YUL

STL

5h 30m

1 stop

C$ 837Multiple Airlines

Fri, 7 Aug - Tue, 11 Aug

7:28 a.m. - 10:54 p.m.

STL

YUL

14h 26m

1 stop

12:32 p.m. - 12:27 a.m.

YUL

STL

12h 55m

1 stop

C$ 845American Airlines

Sun, 20 Sep - Sat, 26 Sep

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WestJet flights from St. Louis to Montreal

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

WestJet

4 Dec

STL9:00 a.m.Lambert-St Louis

28h 12m

2 stops

YUL2:12 p.m.Montreal Pierre Elliott Trudeau Intl

6 Dec

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

15h 37m

1 stop

STL8:37 p.m.Lambert-St Louis

C$ 835

WestJet

24 Sep

STL6:00 a.m.Lambert-St Louis

9h 45m

2 stops

YUL4:45 p.m.Montreal Pierre Elliott Trudeau Intl

28 Sep

YUL8:00 p.m.Montreal Pierre Elliott Trudeau Intl

15h 55m

2 stops

STL10:55 a.m.Lambert-St Louis

C$ 889

WestJet

4 Nov

STL12:00 p.m.Lambert-St Louis

25h 12m

2 stops

YUL2:12 p.m.Montreal Pierre Elliott Trudeau Intl

6 Nov

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

15h 41m

1 stop

STL8:41 p.m.Lambert-St Louis

C$ 896

American Airlines flights from St. Louis to Montreal

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

American Airlines

12 Aug

STL6:00 a.m.Lambert-St Louis

9h 50m

1 stop

YUL4:50 p.m.Montreal Pierre Elliott Trudeau Intl

19 Aug

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

12h 44m

1 stop

STL12:14 a.m.Lambert-St Louis

C$ 764

American Airlines

18 Aug

STL4:54 p.m.Lambert-St Louis

17h 49m

1 stop

YUL11:43 a.m.Montreal Pierre Elliott Trudeau Intl

21 Aug

YUL5:34 p.m.Montreal Pierre Elliott Trudeau Intl

15h 50m

1 stop

STL8:24 a.m.Lambert-St Louis

C$ 795

American Airlines

28 Jul

STL3:20 p.m.Lambert-St Louis

17h 28m

1 stop

YUL9:48 a.m.Montreal Pierre Elliott Trudeau Intl

29 Jul

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

12h 46m

1 stop

STL12:16 a.m.Lambert-St Louis

C$ 818

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 12/8

6:00 a.m.-4:50 p.m.

1 stop9h 50m

Montreal Pierre Elliott Trudeau Intl

Wed 19/8

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

1 stop12h 44m

C$ 764

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 18/8

4:54 p.m.-11:43 a.m.

1 stop17h 49m

Montreal Pierre Elliott Trudeau Intl

Fri 21/8

5:34 p.m.-8:24 a.m.

1 stop15h 50m

C$ 795

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 31/7

4:57 p.m.-6:15 p.m.

2 stops24h 18m

Montreal Pierre Elliott Trudeau Intl

Wed 5/8

6:51 p.m.-11:21 p.m.

1 stop5h 30m

C$ 806

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 28/7

3:20 p.m.-9:48 a.m.

1 stop17h 28m

Montreal Pierre Elliott Trudeau Intl

Wed 29/7

12:30 p.m.-12:16 a.m.

1 stop12h 46m

C$ 818

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 28/8

6:17 p.m.-2:08 p.m.

2 stops18h 51m

Montreal Pierre Elliott Trudeau Intl

Sun 6/9

6:00 a.m.-9:37 a.m.

1 stop4h 37m

C$ 823

Quickest round-trip

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 29/7

6:55 a.m.-4:47 p.m.

1 stop8h 52m

Montreal Pierre Elliott Trudeau Intl

Wed 5/8

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

1 stop12h 44m

C$ 828

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 4/12

9:00 a.m.-2:12 p.m.

2 stops28h 12m

Montreal Pierre Elliott Trudeau Intl

Sun 6/12

6:00 a.m.-8:37 p.m.

1 stop15h 37m

C$ 835

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 3/8

5:10 a.m.-10:56 p.m.

1 stop16h 46m

Montreal Pierre Elliott Trudeau Intl

Thu 6/8

7:29 a.m.-6:59 p.m.

1 stop12h 30m

C$ 836

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 7/8

4:57 p.m.-2:08 p.m.

2 stops20h 11m

Montreal Pierre Elliott Trudeau Intl

Tue 11/8

6:51 p.m.-11:21 p.m.

1 stop5h 30m

C$ 837

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 20/9

7:28 a.m.-10:54 p.m.

1 stop14h 26m

Montreal Pierre Elliott Trudeau Intl

Sat 26/9

12:32 p.m.-12:27 a.m.

1 stop12h 55m

C$ 845

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

Other information

What is the typical price of a round-trip flight between St. Louis and Montreal?

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$ 365, 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 October instead. Flights to Montreal in October, while not as cheap as those in August, still average around C$ 393.

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

Fastest flight time	2h 31m
Direct flights	Mon, Tue, Wed, Thu, Fri and Sat
Airports in Montreal	2 airports

The fastest flight from St. Louis to Montreal takes 2h 31m

Direct flights go from St. Louis to Montreal on Monday, Tuesday, Wednesday, 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

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 2h 31m, 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 28.92% of all bookings. The subsequent popular models are Boeing 787-8 Dreamliner at 27.71%, Airbus A220-300 at 26.51%, and Airbus A330-300 at 3.61%.

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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Fly into one of these airports located in Montreal

Montreal St Hubert Airport

Montreal Pierre Elliott Trudeau Intl Airport

Cheap flights from St. Louis to Montreal from C$ 341

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 24/7. 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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WestJet flights from St. Louis to Montreal

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

American Airlines flights from St. Louis to Montreal

Our best American Airlines 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 typical price of a round-trip flight between St. Louis and 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?

How many flights depart from St. Louis to Montreal on average per day?

How many flights depart from St. Louis to Montreal on average per week?

When to book flights from St. Louis to Montreal

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

Direct flights

Airports in Montreal

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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