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 25m.

What airlines fly to Montreal?

Air Canada, American Airlines 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 47% of people opting to fly with this airline when traveling to Montreal. Keep in mind that there are 3 different airlines that fly to Montreal on a routine basis, so you have a few additional options to choose from.

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

Detroit (DTW) was the most common stop: 40% of momondo users choosing 1-stop flights on this route connected there.

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

As of May 2026, 17 flights take off from St. Louis and land in Montreal each week. The most common flight departure day for this route is Mon, with 18% of weekly flights 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

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

Detroit (DTW) has the shortest average layover time for this route: 1h 02m.

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.

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

As of May 2026, 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 70% of daily 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 are updated daily.

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

As of May 2026, there are 3 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.

$219 Cheap Flights from St. Louis to Montreal in 2026

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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.

12:10 pm - 3:42 pm

STL

YUL

2h 32mnonstop

4:55 pm - 6:42 pm

YUL

STL

2h 47mnonstop

$436Air Canada

Sa, Aug 1 - Di, Aug 4

8:55 am - 3:22 pm

STL

YUL

5h 27m

1 stop

4:55 pm - 6:42 pm

YUL

STL

2h 47mnonstop

$444Air Canada

Sa, Aug 1 - Di, Aug 4

7:30 am - 10:59 pm

STL

YUL

14h 29m

1 stop

12:30 pm - 12:16 am

YUL

STL

12h 46m

1 stop

$478American Airlines

So, Jun 14 - Di, Jun 16

8:55 am - 4:22 pm

STL

YUL

6h 27m

1 stop

10:10 am - 2:02 pm

YUL

STL

4h 52m

1 stop

$492Air Canada

Sa, Aug 1 - Di, Aug 4

5:27 pm - 6:15 pm

STL

YUL

23h 48m

2 stops

6:50 pm - 11:56 pm

YUL

STL

6h 06m

1 stop

$502Multiple Airlines

Fr, Jun 5 - So, Jun 7

12:10 pm - 3:42 pm

STL

YUL

2h 32mnonstop

4:55 pm - 6:42 pm

YUL

STL

2h 47mnonstop

$513Air Canada

Di, Aug 11 - Mi, Aug 12

2:15 pm - 8:51 pm

STL

YUL

5h 36m

1 stop

6:30 pm - 8:25 pm

YUL

STL

2h 55mnonstop

$516Air Canada

Mo, Jun 8 - Fr, Jun 12

7:30 am - 10:59 pm

STL

YUL

14h 29m

1 stop

12:30 pm - 12:16 am

YUL

STL

12h 46m

1 stop

$517American Airlines

Mo, Jun 29 - Di, Jul 7

12:10 pm - 3:41 pm

STL

YUL

2h 31mnonstop

4:55 pm - 6:41 pm

YUL

STL

2h 46mnonstop

$522Air Canada

So, Sep 13 - Mi, Sep 23

2:56 pm - 9:50 am

STL

YUL

17h 54m

1 stop

12:30 pm - 12:16 am

YUL

STL

12h 46m

1 stop

$525American Airlines

Mo, Jun 15 - Mi, Jun 17

Air Canada flights from St. Louis to Montreal

Our best Air Canada deals on St. Louis to Montreal flight tickets

Air Canada

Aug 1

STL12:10 pmLambert-St Louis

2h 32m

YUL3:42 pmMontreal Pierre Elliott Trudeau Intl

Aug 4

YUL4:55 pmMontreal Pierre Elliott Trudeau Intl

2h 47m

STL6:42 pmLambert-St Louis

$436

Air Canada

Aug 1

STL8:55 amLambert-St Louis

5h 27m

1 stop

YUL3:22 pmMontreal Pierre Elliott Trudeau Intl

Aug 4

YUL4:55 pmMontreal Pierre Elliott Trudeau Intl

2h 47m

STL6:42 pmLambert-St Louis

$444

Air Canada

Aug 1

STL8:55 amLambert-St Louis

6h 27m

1 stop

YUL4:22 pmMontreal Pierre Elliott Trudeau Intl

Aug 4

YUL10:10 amMontreal Pierre Elliott Trudeau Intl

4h 52m

1 stop

STL2:02 pmLambert-St Louis

$492

Delta flights from St. Louis to Montreal

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

Delta

Jul 1

STL1:39 pmLambert-St Louis

9h 16m

1 stop

YUL11:55 pmMontreal Pierre Elliott Trudeau Intl

Jul 6

YUL6:50 pmMontreal Pierre Elliott Trudeau Intl

6h 06m

1 stop

STL11:56 pmLambert-St Louis

$538

Delta

Sep 14

STL5:30 pmLambert-St Louis

5h 26m

1 stop

YUL11:56 pmMontreal Pierre Elliott Trudeau Intl

Sep 23

YUL4:55 pmMontreal Pierre Elliott Trudeau Intl

4h 36m

1 stop

STL8:31 pmLambert-St Louis

$547

Delta

Jun 16

STL9:22 amLambert-St Louis

8h 32m

1 stop

YUL6:54 pmMontreal Pierre Elliott Trudeau Intl

Jun 23

YUL2:40 pmMontreal Pierre Elliott Trudeau Intl

7h 06m

1 stop

STL8:46 pmLambert-St Louis

$564

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sa 8/1

12:10 pm-3:42 pm

Nonstop2h 32m

Montreal Pierre Elliott Trudeau Intl

Di 8/4

4:55 pm-6:42 pm

Nonstop2h 47m

$436

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sa 8/1

8:55 am-3:22 pm

1 stop5h 27m

Montreal Pierre Elliott Trudeau Intl

Di 8/4

4:55 pm-6:42 pm

Nonstop2h 47m

$444

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

So 6/14

7:30 am-10:59 pm

1 stop14h 29m

Montreal Pierre Elliott Trudeau Intl

Di 6/16

12:30 pm-12:16 am

1 stop12h 46m

$478

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sa 8/1

8:55 am-4:22 pm

1 stop6h 27m

Montreal Pierre Elliott Trudeau Intl

Di 8/4

10:10 am-2:02 pm

1 stop4h 52m

$492

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fr 6/5

5:27 pm-6:15 pm

2 stops23h 48m

Montreal Pierre Elliott Trudeau Intl

So 6/7

6:50 pm-11:56 pm

1 stop6h 06m

$502

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Di 8/11

12:10 pm-3:42 pm

Nonstop2h 32m

Montreal Pierre Elliott Trudeau Intl

Mi 8/12

4:55 pm-6:42 pm

Nonstop2h 47m

$513

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mo 6/8

2:15 pm-8:51 pm

1 stop5h 36m

Montreal Pierre Elliott Trudeau Intl

Fr 6/12

6:30 pm-8:25 pm

Nonstop2h 55m

$516

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mo 6/29

7:30 am-10:59 pm

1 stop14h 29m

Montreal Pierre Elliott Trudeau Intl

Di 7/7

12:30 pm-12:16 am

1 stop12h 46m

$517

Quickest round-trip

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

So 9/13

12:10 pm-3:41 pm

Nonstop2h 31m

Montreal Pierre Elliott Trudeau Intl

Mi 9/23

4:55 pm-6:41 pm

Nonstop2h 46m

$522

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mo 6/15

2:56 pm-9:50 am

1 stop17h 54m

Montreal Pierre Elliott Trudeau Intl

Mi 6/17

12:30 pm-12:16 am

1 stop12h 46m

$525

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 August. Flight prices, which tend to average around $285, are often lower during this time because this is during the off-season. If you are unable to visit Montreal during the month of August, then departing from St. Louis during the month May is also very affordable. Most momondo users find prices during this month for around $300.

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 Wednesday when prices can be found for as low as $923. Flights from St. Louis to Montreal on a Friday will generally be more expensive and average around $1,184. 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 at noon. Flights from St. Louis to Montreal during this time can be as low as $995. In the morning is when there is more demand to fly to Montreal, so prices are often more expensive at around $1,006 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 St. Louis to Montreal flights?

There are 3 cabin classes 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?

No. A direct flight is the cheapest option for a flight between St. Louis to Montreal.

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	$402
Fastest flight time	2h 31m
Direct flights	Every day
Airports in Montreal	2 airports

The best one-way flight to Montreal from St. Louis in the past 72 hours is $402. The best round-trip flight deal from St. Louis to Montreal found on momondo in the last 72 hours is $1,040.

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

Direct flights go from St. Louis to Montreal every day.

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 distance between Lambert-St Louis and Montreal is about 973.0 mi. A reasonable flight in good conditions will take 2h 31m.
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 May 2026, there are 3 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 Boeing 787-8 Dreamliner (49.28% of total bookings). The next most popular plane models are Airbus A220-300 (17.39%), Canadair (Bombardier) Regional Jet 900 (11.59%), and Airbus A330-300 (4.35%).
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 53% of the total bookings. Other popular airlines include Delta with 17%, American Airlines with 15%, and United Airlines with 15%.

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
Air Canada	PriceFrom $318	Free Cancellation	Rating 7.1 11,065 reviews	Search Air Canada flights
United Airlines	PriceFrom $333	Free Cancellation	Rating 7.4 9,736 reviews	Search United Airlines flights
American Airlines	PriceFrom $348	Free Cancellation	Rating 7.1 11,641 reviews	Search American Airlines flights

United Airlines Flights From St. Louis to Montreal
Across 10 United Airlines flights from St. Louis to Montreal this week, the average price was $765, with the best United Airlines deals starting from $333 round-trip. 9,736 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 11,065 reviews) operates around 7 flights from St. Louis to Montreal in any given week. The average Air Canada airfare for this route is around $661, with deals from around $318 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.

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Fly into one of these airports located in Montreal

Montreal St Hubert Airport

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Cheap flights from St. Louis to Montreal from $219

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 7/12. 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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Our best Air Canada 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 day to depart on your flight to Montreal?

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

What airlines fly to Montreal?

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

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

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

Which layover airport has the shortest connection time from 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

Best Price Found

Fastest flight time

Direct flights

Airports in Montreal

Frequently asked questions about flying 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?

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

Fly your favorite airline to Montreal

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

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

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