Which layover airport has the shortest connection time from St. Louis to Montreal?

Detroit (DTW) has the shortest average layover time for this route: 0h 54m.

Which airport is the most popular layover for flights between St. Louis and Montreal?

Chicago (ORD) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

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

As of September 2025, 2 flights take off from St. Louis and land in Montreal each day. The most common flight departure time for this route is 1:00PM, with 100% of daily flights taking off in the afternoon.

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

As of September 2025, 14 flights take off from St. Louis and land in Montreal each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.

What airlines fly to Montreal?

Air Canada, Delta and United Airlines are the top three most popular airlines that fly to Montreal from St. Louis according to our data. Air Canada is the first choice among our users, with 45% of people opting to fly with this airline when traveling to Montreal. Keep in mind that there are 4 different airlines that fly to Montreal on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest travel time from St. Louis to Montreal?

Flights connecting via Detroit (DTW) have the shortest average one-way travel time: 4h 19m.

Which layover airport offers the lowest fares from St. Louis to Montreal?

Flights via Chicago (ORD) offer the lowest average round-trip price of $341.

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

American Airlines, 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 are updated daily.

How many operators does momondo search for flights from Lambert-St Louis Airport to Montreal?

As of September 2025, there are 4 operators available to choose from for flights from Lambert-St Louis Airport to Montreal.

How old do you have to be to fly from Lambert-St Louis Airport to Montreal?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, 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 required travel and health documents for your Montreal trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Montreal. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$148 Cheap Flights from St. Louis to Montreal in 2025/26

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 $603 to $814. The lowest price recently found on this route was $367.

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Find the cheapest flights from St. Louis to Montreal

Round-trip

One-way

Direct

Cheap round-trip flights

12:20 pm - 4:28 pmSTL-YUL

27h 08m1 stop

4:35 pm - 8:45 amYUL-STL

17h 10m1 stop

$367Multiple Airlines

Find Deal

Thu, Dec 4 - Sun, Dec 7

10:57 am - 3:10 pmSTL-YUL

27h 13m1 stop

2:30 pm - 1:57 pmYUL-STL

24h 27m2 stops

$376Multiple Airlines

Find Deal

Thu, Oct 30 - Thu, Nov 6

7:15 pm - 5:28 pmSTL-YUL

21h 13m1 stop

5:10 pm - 10:12 amYUL-STL

18h 02m2 stops

$402Multiple Airlines

Find Deal

Sat, Nov 1 - Sat, Nov 8

9:45 am - 12:30 amSTL-YUL

13h 45m1 stop

5:25 pm - 11:01 amYUL-STL

18h 36m2 stops

$404Multiple Airlines

Find Deal

Fri, Dec 5 - Sat, Dec 6

7:16 am - 4:39 pmSTL-YUL

8h 23m1 stop

3:52 pm - 11:56 pmYUL-STL

9h 04m1 stop

$408American Airlines

Find Deal

Thu, Oct 30 - Thu, Nov 6

7:16 am - 4:39 pmSTL-YUL

8h 23m1 stop

3:52 pm - 11:56 pmYUL-STL

9h 04m1 stop

$414American Airlines

Find Deal

Thu, Oct 30 - Thu, Nov 6

4:34 pm - 11:40 amSTL-YUL

18h 06m1 stop

7:30 am - 8:23 pmYUL-STL

13h 53m2 stops

$418American Airlines

Find Deal

Tue, Oct 21 - Wed, Nov 12

5:00 am - 1:54 pmSTL-YUL

7h 54m1 stop

8:20 am - 10:35 pmYUL-STL

15h 15m1 stop

$522United Airlines

Find Deal

Thu, Oct 16 - Sat, Oct 18

6:00 am - 8:37 amSTL-YUL

25h 37m1 stop

7:30 pm - 3:29 pmYUL-STL

20h 59m1 stop

$529Delta

Find Deal

Sun, Oct 26 - Fri, Oct 31

5:28 pm - 6:42 pmSTL-YUL

24h 14m1 stop

6:35 am - 7:42 pmYUL-STL

14h 07m2 stops

$531United Airlines

Find Deal

Thu, Oct 16 - Sat, Oct 18

Delta flights from St. Louis to Montreal

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

Delta

Oct 26

STL6:00 amLambert-St Louis

25h 37m

1 stop

YUL8:37 amMontreal Pierre Elliott Trudeau Intl

Oct 31

YUL7:30 pmMontreal Pierre Elliott Trudeau Intl

20h 59m

1 stop

STL3:29 pmLambert-St Louis

$529

Find similar

Delta

Oct 1

STL6:05 amLambert-St Louis

9h 00m

1 stop

YUL4:05 pmMontreal Pierre Elliott Trudeau Intl

Oct 12

YUL6:00 amMontreal Pierre Elliott Trudeau Intl

8h 22m

1 stop

STL1:22 pmLambert-St Louis

$704

Find similar

Delta

Oct 1

STL9:19 amLambert-St Louis

11h 38m

2 stops

YUL9:57 pmMontreal Pierre Elliott Trudeau Intl

Oct 12

YUL6:00 amMontreal Pierre Elliott Trudeau Intl

4h 37m

1 stop

STL9:37 amLambert-St Louis

$713

Find similar

American Airlines flights from St. Louis to Montreal

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

American Airlines

Oct 30

STL7:16 amLambert-St Louis

8h 23m

1 stop

YUL4:39 pmMontreal Pierre Elliott Trudeau Intl

Nov 6

YUL3:52 pmMontreal Pierre Elliott Trudeau Intl

9h 04m

1 stop

STL11:56 pmLambert-St Louis

$408

Find similar

American Airlines

Oct 30

STL7:16 amLambert-St Louis

8h 23m

1 stop

YUL4:39 pmMontreal Pierre Elliott Trudeau Intl

Nov 6

YUL3:52 pmMontreal Pierre Elliott Trudeau Intl

9h 04m

1 stop

STL11:56 pmLambert-St Louis

$414

Find similar

American Airlines

Oct 21

STL4:34 pmLambert-St Louis

18h 06m

1 stop

YUL11:40 amMontreal Pierre Elliott Trudeau Intl

Nov 12

YUL7:30 amMontreal Pierre Elliott Trudeau Intl

13h 53m

2 stops

STL8:23 pmLambert-St Louis

$418

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 12/4

12:20 pm-4:28 pm

1 stop27h 08m

Montreal Pierre Elliott Trudeau Intl

Sun 12/7

4:35 pm-8:45 am

1 stop17h 10m

$367

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 10/30

10:57 am-3:10 pm

1 stop27h 13m

Montreal Pierre Elliott Trudeau Intl

Thu 11/6

2:30 pm-1:57 pm

2 stops24h 27m

$376

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 11/1

7:15 pm-5:28 pm

1 stop21h 13m

Montreal Pierre Elliott Trudeau Intl

Sat 11/8

5:10 pm-10:12 am

2 stops18h 02m

$402

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 12/5

9:45 am-12:30 am

1 stop13h 45m

Montreal Pierre Elliott Trudeau Intl

Sat 12/6

5:25 pm-11:01 am

2 stops18h 36m

$404

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 10/30

7:16 am-4:39 pm

1 stop8h 23m

Montreal Pierre Elliott Trudeau Intl

Thu 11/6

3:52 pm-11:56 pm

1 stop9h 04m

$408

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 10/30

7:16 am-4:39 pm

1 stop8h 23m

Montreal Pierre Elliott Trudeau Intl

Thu 11/6

3:52 pm-11:56 pm

1 stop9h 04m

$414

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 10/21

4:34 pm-11:40 am

1 stop18h 06m

Montreal Pierre Elliott Trudeau Intl

Wed 11/12

7:30 am-8:23 pm

2 stops13h 53m

$418

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 10/16

5:00 am-1:54 pm

1 stop7h 54m

Montreal Pierre Elliott Trudeau Intl

Sat 10/18

8:20 am-10:35 pm

1 stop15h 15m

$522

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 10/26

6:00 am-8:37 am

1 stop25h 37m

Montreal Pierre Elliott Trudeau Intl

Fri 10/31

7:30 pm-3:29 pm

1 stop20h 59m

$529

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 10/16

5:28 pm-6:42 pm

1 stop24h 14m

Montreal Pierre Elliott Trudeau Intl

Sat 10/18

6:35 am-7:42 pm

2 stops14h 07m

$531

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

Layovers

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 June. Flight prices, which tend to average around $319, are often lower during this time because this is during the off-season. If you are unable to visit Montreal during the month of June, then departing from St. Louis during the month August is also very affordable. Most momondo users find prices during this month for around $462.

What is the cheapest day to depart on your flight to Montreal?

The cheapest day to depart from St. Louis to Montreal is on a Tuesday when prices can be found for as low as $1,042. Flights from St. Louis to Montreal on a Friday will generally be more expensive and average around $1,232. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Montreal?

Our most recent data shows that the best time of day to fly to Montreal is in the evening. Flights from St. Louis to Montreal during this time can be as low as $266. At noon is when there is more demand to fly to Montreal, so prices are often more expensive at around $1,113 per ticket.

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 are 3 cabin classes 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 6% 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

Best Price Found	$408
Fastest flight time	2h 30m
Direct flights	Mon, Tue, Wed, Thu and Sat
Airports in Montreal	1 airport

The best one-way flight to Montreal from St. Louis in the past 72 hours is $408. The best round-trip flight deal from St. Louis to Montreal found on momondo in the last 72 hours is $704.

The fastest flight from St. Louis to Montreal takes 2h 30m

Direct flights go from St. Louis to Montreal on Monday, Tuesday, Wednesday, Thursday and Saturday. There are no airlines offering direct flights.

There is 1 airport near Montreal: Montreal Pierre Elliott Trudeau Intl (YUL)

Search flight deals

How far is Lambert-St Louis to Montreal by plane?
The distance between Lambert-St Louis and Montreal is about 973.0 mi. A reasonable flight in good conditions will take 7h 54m.
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 are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Montreal?
As of September 2025, there are 4 operators available to choose from for flights from Lambert-St Louis Airport to Montreal.
How old do you have to be to fly from Lambert-St Louis Airport to Montreal?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, 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 required travel and health documents for your Montreal trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Montreal. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from St. Louis to Montreal?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from St. Louis to Montreal is Canadair (Bombardier) Regional Jet 900 (77.67% of total bookings). The next most popular plane models are Airbus A330-300 (4.85%), Boeing 787-8 Dreamliner (2.91%), and Boeing 737 MAX 8 (1.94%).
What is the most popular airline from St. Louis to Montreal?
Based on momondo bookings for flights between St. Louis and Montreal, the leading airline is Air Canada, making up 50% of the total bookings. Other popular airlines include United Airlines with 23%, American Airlines with 14%, and Delta with 13%.

Best airlines flying from St. Louis to Montreal

Compare and see reviews for airlines that fly from St. Louis to Montreal with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $246	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights
Delta	PriceFrom $255	Free Cancellation	Rating 7.9 7,961 reviews	Search Delta flights
Air Canada	PriceFrom $282	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
American Airlines	PriceFrom $348	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights

United Airlines Flights From St. Louis to Montreal
Across 7 United Airlines flights from St. Louis to Montreal this week, the average price was $765, with the best United Airlines deals starting from $246 round-trip. 8,926 users have rated United Airlines on momondo, with an average score of 7.4/10.
Air Canada Flights From St. Louis to Montreal
Air Canada (7.1/10 from 10,000 reviews) operates around 7 flights from St. Louis to Montreal in any given week. The average Air Canada airfare for this route is around $692, with deals from around $282 rare but found on momondo. Referenced prices are for round-trip St. Louis to Montreal flight searches in the last 72 hours.

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Montreal?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to Montreal for you.

Can I find flights from St. Louis to Montreal with flexible booking policies on momondo?

All flight searches from St. Louis to Montreal on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from St. Louis to Montreal?

Once all potential St. Louis to Montreal flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Montreal right now. Can momondo alert me if prices change?

Yes. momondo can track prices for St. Louis to Montreal flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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.

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Find better results for your trip to Canada

Fly into one of these airports located in Montreal

Montreal St Hubert Airport

Montreal Pierre Elliott Trudeau Intl Airport

Popular cities in Canada

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Flights to Québec Cityfrom $177

Flights to Saskatoonfrom $117

Flights to Kelownafrom $156

Flights to St. John'sfrom $244

Flights to Reginafrom $206

Flights to Monctonfrom $393

Cheap flights from St. Louis to Montreal from $148

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 10/30. 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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Big names and deals

Filter for what you want

Filter for what you want

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Find the cheapest flights from St. Louis to Montreal

Cheap round-trip flights

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Cheap direct flights

Delta flights from St. Louis to Montreal

Our best Delta 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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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

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 day to depart on your flight to Montreal?

What is the cheapest time of day to depart on your flight to Montreal?

Our most recent data shows that the best time of day to fly to Montreal is in the evening. Flights from St. Louis to Montreal during this time can be as low as $266. At noon is when there is more demand to fly to Montreal, so prices are often more expensive at around $1,113 per ticket.

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 are 3 cabin classes 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 6% on your flight if you consider stops on a St. Louis to Montreal flight.

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

American Airlines, United Airlines, and Air Canada are the most popular carriers operating from Lambert-St Louis to Montreal

What airlines fly to Montreal?

Which airport is the most popular layover for flights between St. Louis and Montreal?

Chicago (ORD) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from St. Louis to Montreal?

Flights via Chicago (ORD) offer the lowest average round-trip price of $341.

Which layover airport has the shortest travel time from St. Louis to Montreal?

Flights connecting via Detroit (DTW) have the shortest average one-way travel time: 4h 19m.

Which layover airport has the shortest connection time from St. Louis to Montreal?

Detroit (DTW) has the shortest average layover time for this route: 0h 54m.

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

As of September 2025, 2 flights take off from St. Louis and land in Montreal each day. The most common flight departure time for this route is 1:00PM, with 100% of daily flights taking off in the afternoon.

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

As of September 2025, 14 flights take off from St. Louis and land in Montreal each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.

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

Best Price Found

Fastest flight time

Direct flights

Airports in Montreal

How far is Lambert-St Louis to Montreal by plane?

When did momondo last update prices for flights from Lambert-St Louis Airport to Montreal?

How many operators does momondo search for flights from Lambert-St Louis Airport to Montreal?

How old do you have to be to fly from Lambert-St Louis Airport to Montreal?

What documentation or ID do you need to fly to Montreal?

What is the most popular plane model from St. Louis to Montreal?

What is the most popular airline from St. Louis to Montreal?

Best airlines flying from St. Louis to Montreal

Compare and see reviews for airlines that fly from St. Louis to Montreal with momondo

United Airlines Flights From St. Louis to Montreal

Air Canada Flights From St. Louis to Montreal

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Montreal?

Can I find flights from St. Louis to Montreal with flexible booking policies on momondo?

How can momondo help me find flights from St. Louis to Montreal?

I’m not ready to book a flight from St. Louis to Montreal right now. Can momondo alert me if prices change?

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 9.4 mi from Montreal