How long is the flight from St. Louis to Montreal?

American Airlines can get you from St. Louis to Montreal in just under 19h 25m. Your travel time can differ by up to . St. Louis and Montreal are separated by a distance of 967 mi.

What are the cheapest airlines flying from St. Louis to Montreal round-trip?

Cheapflights users have booked flights from St. Louis to Montreal round-trip from $246. Other airlines that can offer you cheap pricing are Delta, from $255, and Air Canada, from $285. United Airlines is currently priced 60% below the average price you’ll pay for this route.

In terms of precipitation, rainfall in Montreal ranges from 2.5 - 4.4 inches per month. August is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Montreal when rainfall is around 2.5 in.

If weather is an important factor for your trip to Montreal, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 15.8 F).

What are the cheapest flights from St. Louis to Montreal?

Looking at all options, your cheapest flight can be booked for $488. While the most popular route (Lambert-St Louis - Montreal Pierre Elliott Trudeau Intl) can be booked for $335 on average, our data indicates $1,143 when flying from St. Louis to Montreal.

What are the most reliable airlines from St. Louis to Montreal?

Consider Air Canada (80%), Jazz (80%) or United Airlines (80%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to Montreal.

What are the most popular airlines that fly from St. Louis to Montreal?

Before booking your flight from St. Louis to Montreal check out the most popular airlines for this route: Air Canada, Delta or United Airlines.

Most accurate provider : When it comes to deals on St. Louis-Montreal flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Montreal flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-Montreal flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on St. Louis-Montreal flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Montreal flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly from for flights from St. Louis to Montreal?

Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Montreal. On average, Lambert-St Louis has 0 outbound flights to Montreal per day from 4 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

Can I find deals for flights from St. Louis to Montreal that include hotel bookings?

Yes. In addition to deals on St. Louis to Montreal flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Montreal?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Montreal.

Can I find deals for business class flights from St. Louis to Montreal?

Yes. Cheapflights offers flight deals from St. Louis to Montreal by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$151+ Flights from St. Louis to Montreal

Q: How much does it cost to fly round-trip from St. Louis to Montreal?

Airfare is below average for this route at the moment. St. Louis to Montreal flights typically cost between $680 and $697 in December. The cheapest round-trip price found within the last 3 days was $335 on Multiple Airlines (Dec 30-Jan 6).

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Cheap flight deals from St. Louis to Montreal

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$335 (Kiwi.com)
One-way from	$205 (American Airlines)
Popular in	October
Cheapest in	June
Average price	$672
Good round-trip deal	$847 or less
Good one-way deal	$578 or less

Provider with most accurate pricing for Lambert-St Louis-Montreal (YMQ) flight deals.

Search Deals

Provider most trusted by Cheapflights users for Lambert-St Louis-Montreal (YMQ) flights.

Search Deals

From Lambert-St Louis to Montreal (YMQ)

Search Deals

One-way flight from Lambert-St Louis to Montreal (YMQ)

Search Deals

Highest demand for flights based on searches. 13% potential increase in price ($97 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in November 2025

Search Deals

Price to beat on a round-trip flight from Lambert-St Louis to Montreal (YMQ).

Search Deals

Price to beat on a one-way flight from Lambert-St Louis to Montreal (YMQ).

Search Deals

Find flight deals from St. Louis to Montreal

Cheapest flights from St. Louis to Montreal
Explore the most affordable flight options available from St. Louis to Montreal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2025.

Tue 12/3011:51 amSTL - YUL

1 stop26h 19mMultiple Airlines

Tue 1/65:25 pmYUL - STL

2 stops30h 08mMultiple Airlines

Deal found 11/18

$335

Tue 12/3011:51 amSTL - YUL

1 stop26h 19mMultiple Airlines

Wed 1/74:35 pmYUL - STL

1 stop30h 58mMultiple Airlines

Deal found 11/18

$368

Mon 12/294:27 pmSTL - YUL

2 stops21h 43mMultiple Airlines

Wed 1/74:35 pmYUL - STL

1 stop30h 58mMultiple Airlines

Deal found 11/18

$441

Mon 12/294:27 pmSTL - YUL

2 stops21h 43mMultiple Airlines

Mon 1/56:45 amYUL - STL

1 stop29h 11mMultiple Airlines

Deal found 11/18

$507

Tue 12/306:35 pmSTL - YUL

1 stop18h 25mUnited Airlines

Tue 1/64:45 pmYUL - STL

1 stop20h 44mUnited Airlines

Deal found 11/18

$534

Tue 12/308:01 pmSTL - YUL

1 stop18h 09mAmerican Airlines

Tue 1/63:52 pmYUL - STL

1 stop19h 28mAmerican Airlines

Deal found 11/18

$541

Mon 12/157:35 pmSTL - YUL

1 stop18h 35mAmerican Airlines

Tue 1/63:52 pmYUL - STL

1 stop23h 58mAmerican Airlines

Deal found 11/20

$543

Best flights from St. Louis to Montreal
Discover carefully curated flight deals from St. Louis to Montreal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 21, 2025.

Thu 1/85:11 pmSTL - YUL

1 stop30h 19mMultiple Airlines

Mon 1/128:00 amYUL - STL

2 stops39h 34mMultiple Airlines

Deal found 11/19

$363

Sat 1/106:43 pmSTL - YUL

1 stop19h 25mAmerican Airlines

Mon 1/123:52 pmYUL - STL

1 stop19h 28mAmerican Airlines

Deal found 11/19

$387

Sat 1/106:30 amSTL - YUL

2 stops11h 41mUnited Airlines

Mon 1/126:25 pmYUL - STL

1 stop21h 05mUnited Airlines

Deal found 11/19

$505

Thu 1/85:32 pmSTL - YUL

1 stop14h 12mDelta

Mon 1/127:30 pmYUL - STL

1 stop14h 04mDelta

Deal found 11/19

$525

Tue 12/3011:51 amSTL - YUL

1 stop26h 19mMultiple Airlines

Wed 1/74:35 pmYUL - STL

1 stop30h 58mMultiple Airlines

Deal found 11/19

$370

Mon 1/266:00 amSTL - YUL

1 stop8h 08mAmerican Airlines

Thu 1/293:52 pmYUL - STL

1 stop19h 28mAmerican Airlines

Deal found 11/19

$448

Sun 1/410:57 amSTL - YUL

2 stops28h 28mMultiple Airlines

Sun 1/114:35 pmYUL - STL

1 stop16h 30mMultiple Airlines

Deal found 11/20

$456

Sun 1/46:00 amSTL - YUL

1 stop8h 10mAmerican Airlines

Sun 1/113:52 pmYUL - STL

1 stop19h 28mAmerican Airlines

Deal found 11/20

$534

Mon 12/157:35 pmSTL - YUL

2 stops17h 14mAmerican Airlines

Tue 1/67:00 amYUL - STL

2 stops15h 15mAmerican Airlines

Deal found 11/20

$543

Wed 3/186:00 amSTL - YUL

2 stops32h 10mMultiple Airlines

Sun 4/54:35 pmYUL - STL

1 stop15h 38mMultiple Airlines

Deal found 11/20

$583

Fri 1/28:01 pmSTL - YUL

1 stop18h 09mAmerican Airlines

Wed 1/73:52 pmYUL - STL

1 stop19h 28mAmerican Airlines

Deal found 11/19

$552

Last-minute flights from St. Louis to Montreal
Discover last-minute flight deals from St. Louis to Montreal. Data last updated November 21, 2025 and is based on user searches.

Fri 12/57:43 pmSTL - YUL

2 stops27h 47mMultiple Airlines

Tue 12/99:35 amYUL - STL

1 stop7h 17mMultiple Airlines

Deal found 11/18

$583

Mon 12/154:49 pmSTL - YUL

1 stop21h 21mAmerican Airlines

Tue 1/67:00 amYUL - STL

2 stops15h 15mAmerican Airlines

Deal found 11/20

$543

Mon 12/156:00 amSTL - YUL

2 stops11h 54mDelta

Tue 1/69:34 amYUL - STL

2 stops12h 09mDelta

Deal found 11/19

$682

Thu 12/1811:51 amSTL - YUL

1 stop11h 54mMultiple Airlines

Thu 12/255:25 pmYUL - STL

2 stops28h 16mMultiple Airlines

Deal found 11/20

$604

Mon 12/294:27 pmSTL - YUL

2 stops22h 56mMultiple Airlines

Wed 1/74:35 pmYUL - STL

1 stop30h 58mMultiple Airlines

Deal found 11/19

$467

Tue 12/3011:51 amSTL - YUL

1 stop26h 19mMultiple Airlines

Wed 1/74:35 pmYUL - STL

1 stop30h 58mMultiple Airlines

Deal found 11/19

$370

Tue 12/305:13 pmSTL - YUL

1 stop5h 46mDelta

Thu 1/89:34 amYUL - STL

2 stops12h 09mDelta

Deal found 11/19

$653

Tue 12/308:01 pmSTL - YUL

1 stop18h 09mAmerican Airlines

Thu 1/83:52 pmYUL - STL

1 stop19h 28mAmerican Airlines

Deal found 11/19

$676

One-way flights from St. Louis to Montreal
Search for one-way flight options from St. Louis to Montreal. Find affordable one-way fares based on user searches. Data last updated November 21, 2025.

Thu 1/156:00 amSTL - YUL

1 stop8h 08mAmerican Airlines

Deal found 11/20

$151

Wed 12/175:05 amSTL - YUL

1 stop9h 05mAmerican Airlines

Deal found 11/19

$205

Thu 1/159:50 amSTL - YUL

3 stops29h 32mMultiple Airlines

Deal found 11/20

$234

Thu 5/77:00 amSTL - YUL

2 stops16h 42mMultiple Airlines

Deal found 11/20

$277

Thu 5/79:30 amSTL - YUL

1 stop23h 41mUnited Airlines

Deal found 11/20

$280

Wed 12/176:30 amSTL - YUL

2 stops11h 32mUnited Airlines

Deal found 11/19

$313

Thu 5/71:30 pmSTL - YUL

Nonstop2h 35mAir Canada

Deal found 11/20

$429

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Montreal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 1/8

5:11 pm-12:30 am

1 stop30h 19m

Montreal Pierre Elliott Trudeau Intl

Mon 1/12

8:00 am-10:34 pm

2 stops39h 34m

$363

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 12/30

11:51 am-3:10 pm

1 stop26h 19m

Montreal Pierre Elliott Trudeau Intl

Wed 1/7

4:35 pm-10:33 pm

1 stop30h 58m

$370

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 1/10

6:43 pm-3:08 pm

1 stop19h 25m

Montreal Pierre Elliott Trudeau Intl

Mon 1/12

3:52 pm-10:20 am

1 stop19h 28m

$387

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 1/26

6:00 am-3:08 pm

1 stop8h 08m

Montreal Pierre Elliott Trudeau Intl

Thu 1/29

3:52 pm-10:20 am

1 stop19h 28m

$448

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 1/4

10:57 am-4:25 pm

2 stops28h 28m

Montreal Pierre Elliott Trudeau Intl

Sun 1/11

4:35 pm-8:05 am

1 stop16h 30m

$456

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 1/10

6:30 am-7:11 pm

2 stops11h 41m

Montreal Pierre Elliott Trudeau Intl

Mon 1/12

6:25 pm-2:30 pm

1 stop21h 05m

$505

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 1/8

5:32 pm-8:44 am

1 stop14h 12m

Montreal Pierre Elliott Trudeau Intl

Mon 1/12

7:30 pm-8:34 am

1 stop14h 04m

$525

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 1/4

6:00 am-3:10 pm

1 stop8h 10m

Montreal Pierre Elliott Trudeau Intl

Sun 1/11

3:52 pm-10:20 am

1 stop19h 28m

$534

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 12/15

7:35 pm-1:49 pm

2 stops17h 14m

Montreal Pierre Elliott Trudeau Intl

Tue 1/6

7:00 am-9:15 pm

2 stops15h 15m

$543

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 1/2

8:01 pm-3:10 pm

1 stop18h 09m

Montreal Pierre Elliott Trudeau Intl

Wed 1/7

3:52 pm-10:20 am

1 stop19h 28m

$552

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 18 results

Compare providers for flights from St. Louis to Montreal

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Montreal in November.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on St. Louis-Montreal flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Montreal flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-Montreal flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on St. Louis-Montreal flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Montreal flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Montreal

Have a flexible travel schedule? Discover the best time to fly to Montreal from St. Louis with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Montreal

What is the cheapest month to book a flight from St. Louis to Montreal?

Currently, July is the cheapest month in which you can book a flight from St. Louis to Montreal (average of $218). Flying from St. Louis to Montreal in November is currently the most expensive (average of $608). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to YMQ?

A simple way to save on the total cost of your ticket is to fly from St. Louis to Montreal in the evening. If you’re flexible enough to do this you can expect to save up to 74% on your trip compared to booking a flight at noon.

How much does it cost to fly round-trip from St. Louis to Montreal?

Reviews of airlines servicing Montreal

Read through reviews of airlines operating flights from St. Louis to Montreal, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

7.9

Good

8,002 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Delta

7.9

Good

8,002 reviews

Delta

7.9

Good

8,002 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

United Airlines

7.4

Good

9,029 reviews

Delta

7.9

Good

8,002 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

American Airlines

7.2

Good

11,047 reviews

Delta

7.9

Good

8,002 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

Air Canada

7.1

Good

10,463 reviews

Delta

7.9

Good

8,002 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

Related info for your journey

What airport do you fly from for flights from St. Louis to Montreal?
Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Montreal. On average, Lambert-St Louis has 0 outbound flights to Montreal per day from 4 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.
How long is the flight from St. Louis to Montreal?
American Airlines can get you from St. Louis to Montreal in just under 19h 25m. Your travel time can differ by up to . St. Louis and Montreal are separated by a distance of 967 mi.
What are the cheapest airlines flying from St. Louis to Montreal round-trip?
Cheapflights users have booked flights from St. Louis to Montreal round-trip from $246. Other airlines that can offer you cheap pricing are Delta, from $255, and Air Canada, from $285. United Airlines is currently priced 60% below the average price you’ll pay for this route.
What are the most reliable airlines from St. Louis to Montreal?
Consider Air Canada (80%), Jazz (80%) or United Airlines (80%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to Montreal.
What are the cheapest flights from St. Louis to Montreal?
Looking at all options, your cheapest flight can be booked for $488. While the most popular route (Lambert-St Louis - Montreal Pierre Elliott Trudeau Intl) can be booked for $335 on average, our data indicates $1,143 when flying from St. Louis to Montreal.
Can I find deals for flights from St. Louis to Montreal that include hotel bookings?
Yes. In addition to deals on St. Louis to Montreal flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Montreal?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Montreal.
Can I find deals for business class flights from St. Louis to Montreal?
Yes. Cheapflights offers flight deals from St. Louis to Montreal by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to Montreal?
Currently, July is the cheapest month in which you can book a flight from St. Louis to Montreal (average of $218). Flying from St. Louis to Montreal in November is currently the most expensive (average of $608). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 4 airlines flying from St. Louis to Montreal

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$246	Average$765	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$255	Average$681	FlexibilityNo cancel fee	On-timeN/A
Air Canada	Cheapest$285	Average$767	FlexibilityNo cancel fee	On-time67%
American Airlines	Cheapest$348	Average$617	FlexibilityNo cancel fee	On-time71%

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$151+ Cheap flights from St. Louis (STL) to Montreal (YMQ)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/15. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Montreal with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from St. Louis to Montreal

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from St. Louis to Montreal

Cheapest flights from St. Louis to MontrealExplore the most affordable flight options available from St. Louis to Montreal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2025.

Explore the most affordable flight options available from St. Louis to Montreal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Montreal that are best for you.

Compare providers for flights from St. Louis to Montreal

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Montreal in November.

Best time to book a flight from St. Louis to Montreal

Have a flexible travel schedule? Discover the best time to fly to Montreal from St. Louis with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Montreal

What is the cheapest month to book a flight from St. Louis to Montreal?

What is the cheapest time of day to fly from STL to YMQ?

Find hourly flight availability from St. Louis to Montreal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 21, 2025.

How much does it cost to fly round-trip from St. Louis to Montreal?

Reviews of airlines servicing Montreal

Read through reviews of airlines operating flights from St. Louis to Montreal, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Montreal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from St. Louis to Montreal?

How long is the flight from St. Louis to Montreal?

What are the cheapest airlines flying from St. Louis to Montreal round-trip?

What are the most reliable airlines from St. Louis to Montreal?

What are the cheapest flights from St. Louis to Montreal?

Can I find deals for flights from St. Louis to Montreal that include hotel bookings?

How can I find direct flights from St. Louis to Montreal?

Can I find deals for business class flights from St. Louis to Montreal?

What is the cheapest month to book a flight from St. Louis to Montreal?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Montreal

See prices for flight routes from nearby airports that may be better suited for you.

Top 4 airlines flying from St. Louis to Montreal

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Cheapest flights from St. Louis to Montreal
Explore the most affordable flight options available from St. Louis to Montreal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2025.