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 June 2026. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.

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

American Airlines, Air Canada, 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 day?

As of June 2026, there are 2 flights per day flying from St. Louis to Montreal. The most common time of day flights depart is 1:00p.m., with 100% of flights taking off in the afternoon.

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$ 286 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$ 742 to C$ 394. The lowest price recently found on this route was C$ 644.

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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.

1:05 p.m. - 4:40 p.m.

STL

YUL

2h 35mdirect

6:30 p.m. - 8:25 p.m.

YUL

STL

2h 55mdirect

C$ 644Air Canada

Sun, 14 Jun - Wed, 17 Jun

8:40 a.m. - 3:21 p.m.

STL

YUL

5h 41m

1 stop

6:30 p.m. - 8:25 p.m.

YUL

STL

2h 55mdirect

C$ 657Air Canada

Sun, 14 Jun - Wed, 17 Jun

8:40 a.m. - 4:21 p.m.

STL

YUL

6h 41m

1 stop

7:30 a.m. - 12:06 p.m.

YUL

STL

5h 36m

1 stop

C$ 668Air Canada

Sun, 14 Jun - Wed, 17 Jun

2:55 p.m. - 9:46 a.m.

STL

YUL

17h 51m

1 stop

10:31 a.m. - 8:44 p.m.

YUL

STL

11h 13m

1 stop

C$ 706American Airlines

Wed, 26 Aug - Wed, 2 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$ 748American Airlines

Wed, 29 Jul - Wed, 12 Aug

1:05 p.m. - 4:40 p.m.

STL

YUL

2h 35mdirect

6:30 p.m. - 8:25 p.m.

YUL

STL

2h 55mdirect

C$ 756Air Canada

Tue, 16 Jun - Thu, 18 Jun

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

STL

YUL

8h 52m

1 stop

10:31 a.m. - 8:44 p.m.

YUL

STL

11h 13m

1 stop

C$ 764American Airlines

Thu, 30 Jul - Wed, 12 Aug

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

STL

YUL

14h 26m

1 stop

10:30 a.m. - 9:17 p.m.

YUL

STL

11h 47m

1 stop

C$ 766American Airlines

Sun, 27 Sep - Wed, 30 Sep

8:41 p.m. - 4:47 p.m.

STL

YUL

19h 06m

1 stop

7:17 a.m. - 5:21 p.m.

YUL

STL

11h 04m

1 stop

C$ 767American Airlines

Tue, 7 Jul - Thu, 9 Jul

1:05 p.m. - 4:40 p.m.

STL

YUL

2h 35mdirect

7:30 a.m. - 12:21 p.m.

YUL

STL

5h 51m

1 stop

C$ 776Air Canada

Tue, 16 Jun - Fri, 19 Jun

Delta flights from St. Louis to Montreal

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

Delta

16 Jun

STL1:39 p.m.Lambert-St Louis

9h 16m

1 stop

YUL11:55 p.m.Montreal Pierre Elliott Trudeau Intl

19 Jun

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

8h 52m

1 stop

STL2:52 p.m.Lambert-St Louis

C$ 791

Delta

16 Jul

STL10:51 a.m.Lambert-St Louis

5h 51m

1 stop

YUL5:42 p.m.Montreal Pierre Elliott Trudeau Intl

19 Jul

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

8h 48m

1 stop

STL2:48 p.m.Lambert-St Louis

C$ 856

Delta

12 Jul

STL6:30 a.m.Lambert-St Louis

4h 26m

1 stop

YUL11:56 a.m.Montreal Pierre Elliott Trudeau Intl

21 Jul

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

11h 46m

2 stops

STL4:46 p.m.Lambert-St Louis

C$ 893

WestJet flights from St. Louis to Montreal

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

WestJet

7 Jul

STL10:51 a.m.Lambert-St Louis

5h 51m

1 stop

YUL5:42 p.m.Montreal Pierre Elliott Trudeau Intl

9 Jul

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

4h 31m

1 stop

STL9:31 a.m.Lambert-St Louis

C$ 796

WestJet

4 Aug

STL6:25 p.m.Lambert-St Louis

4h 05m

1 stop

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

13 Aug

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

5h 46m

1 stop

STL11:46 a.m.Lambert-St Louis

C$ 798

WestJet

15 Jul

STL10:51 a.m.Lambert-St Louis

19h 14m

2 stops

YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl

23 Jul

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

25h 51m

1 stop

STL8:35 p.m.Lambert-St Louis

C$ 809

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 14/6

1:05 p.m.-4:40 p.m.

Nonstop2h 35m

Montreal Pierre Elliott Trudeau Intl

Wed 17/6

6:30 p.m.-8:25 p.m.

Nonstop2h 55m

C$ 644

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 14/6

8:40 a.m.-3:21 p.m.

1 stop5h 41m

Montreal Pierre Elliott Trudeau Intl

Wed 17/6

6:30 p.m.-8:25 p.m.

Nonstop2h 55m

C$ 657

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 14/6

8:40 a.m.-4:21 p.m.

1 stop6h 41m

Montreal Pierre Elliott Trudeau Intl

Wed 17/6

7:30 a.m.-12:06 p.m.

1 stop5h 36m

C$ 668

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 26/8

2:55 p.m.-9:46 a.m.

1 stop17h 51m

Montreal Pierre Elliott Trudeau Intl

Wed 2/9

10:31 a.m.-8:44 p.m.

1 stop11h 13m

C$ 706

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 12/8

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

1 stop12h 44m

C$ 748

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 16/6

1:05 p.m.-4:40 p.m.

Nonstop2h 35m

Montreal Pierre Elliott Trudeau Intl

Thu 18/6

6:30 p.m.-8:25 p.m.

Nonstop2h 55m

C$ 756

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 30/7

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

1 stop8h 52m

Montreal Pierre Elliott Trudeau Intl

Wed 12/8

10:31 a.m.-8:44 p.m.

1 stop11h 13m

C$ 764

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 27/9

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

1 stop14h 26m

Montreal Pierre Elliott Trudeau Intl

Wed 30/9

10:30 a.m.-9:17 p.m.

1 stop11h 47m

C$ 766

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 7/7

8:41 p.m.-4:47 p.m.

1 stop19h 06m

Montreal Pierre Elliott Trudeau Intl

Thu 9/7

7:17 a.m.-5:21 p.m.

1 stop11h 04m

C$ 767

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 16/6

1:05 p.m.-4:40 p.m.

Nonstop2h 35m

Montreal Pierre Elliott Trudeau Intl

Fri 19/6

7:30 a.m.-12:21 p.m.

1 stop5h 51m

C$ 776

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$ 355, 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 May instead. Flights to Montreal in May, while not as cheap as those in August, still average around C$ 415.

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.

Can stopping save me money on St. Louis to Montreal flights?

You could potentially save up to 37% 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 31m
Direct flights	Mon, Wed, Thu, Fri, Sat and Sun
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, Wednesday, Thursday, Friday, Saturday and Sunday. 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 Airbus A220-300, representing 31.58% of all bookings. The subsequent popular models are Canadair (Bombardier) Regional Jet 900 at 22.81%, Boeing 787-8 Dreamliner at 19.30%, and Airbus A330-300 at 5.26%.

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.

An easier way to manage your Montreal trip

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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$ 286

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 17/6. 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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Delta flights from St. Louis to Montreal

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

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

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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?

Can stopping save me money 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.

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