In terms of precipitation, rainfall in Montreal Pierre Elliott Trudeau Intl Airport 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 Pierre Elliott Trudeau Intl Airport when rainfall is around 2.5 in.

If weather is an important factor for your trip to Montreal Pierre Elliott Trudeau Intl Airport, 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 most reliable airlines from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport?

Before booking your flight to Montreal Pierre Elliott Trudeau Intl Airport from St. Louis, check out the most reliable airlines to get you to your destination on time: Air Canada (79%), Jazz (79%), United Airlines( 79%).

What are the most popular airlines that fly from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport?

The most popular airlines flying from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport are Air Canada, United Airlines and Delta. Something to consider prior to booking your flight.

Most accurate provider : When it comes to deals on St. Louis-Montreal Pierre Elliott Trudeau Intl Airport 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 Pierre Elliott Trudeau Intl Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-Montreal Pierre Elliott Trudeau Intl Airport flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on St. Louis-Montreal Pierre Elliott Trudeau Intl Airport 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 Pierre Elliott Trudeau Intl Airport 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 Pierre Elliott Trudeau Intl?

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

How can I find direct flights from St. Louis to Pierre Elliott Trudeau Intl?

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

Can I find deals for business class flights from St. Louis to Pierre Elliott Trudeau Intl?

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

$256+ Flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport

Q: How much does it cost to fly round-trip from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport?

Airfare is below average for this route at the moment. St. Louis to Montreal Pierre Elliott Trudeau Intl Airport flights typically cost between $534 and $793 in January. The cheapest round-trip price found within the last 3 days was $367 on Multiple Airlines (Jan 28-Feb 1).

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Cheap flight deals from St. Louis to Pierre Elliott Trudeau Intl

Cheapest flights from St. Louis to Pierre Elliott Trudeau Intl
Explore the most affordable flight options available from St. Louis to Pierre Elliott Trudeau Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

Wed 12/316:00 amSTL - YUL

1 stop17h 40mMultiple Airlines

Mon 1/54:35 pmYUL - STL

1 stop30h 58mMultiple Airlines

Deal found 12/11

$592

Tue 12/3010:48 amSTL - YUL

2 stops36h 42mMultiple Airlines

Mon 1/54:35 pmYUL - STL

1 stop30h 58mMultiple Airlines

Deal found 12/11

$614

Thu 12/112:47 pmSTL - YUL

2 stops16h 01mMultiple Airlines

Mon 12/157:25 pmYUL - STL

3 stops24h 11mMultiple Airlines

Deal found 12/11

$713

Thu 12/1810:42 amSTL - YUL

2 stops13h 03mMultiple Airlines

Sun 1/44:35 pmYUL - STL

1 stop18h 10mMultiple Airlines

Deal found 12/10

$721

Tue 12/305:59 pmSTL - YUL

1 stop4h 20mDelta

Thu 1/89:34 amYUL - STL

2 stops12h 09mDelta

Deal found 12/10

$749

Tue 12/305:00 amSTL - YUL

1 stop16h 39mAmerican Airlines

Thu 1/87:00 amYUL - STL

1 stop9h 04mAmerican Airlines

Deal found 12/11

$757

Wed 12/314:53 pmSTL - YUL

1 stop21h 17mAmerican Airlines

Mon 1/57:08 amYUL - STL

1 stop17h 47mAmerican Airlines

Deal found 12/11

$759

Wed 12/314:05 pmSTL - YUL

1 stop6h 17mAir Canada

Mon 1/58:50 amYUL - STL

2 stops7h 39mAir Canada

Deal found 12/9

$763

Best flights from St. Louis to Pierre Elliott Trudeau Intl
Discover carefully curated flight deals from St. Louis to Pierre Elliott Trudeau Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 12, 2025.

Thu 2/266:00 amSTL - YUL

1 stop8h 05mAmerican Airlines

Mon 3/23:55 pmYUL - STL

1 stop18h 34mAmerican Airlines

Deal found 12/11

$536

Mon 1/196:00 amSTL - YUL

1 stop17h 40mMultiple Airlines

Mon 1/268:00 amYUL - STL

2 stops40h 33mMultiple Airlines

Deal found 12/10

$556

Mon 1/196:35 amSTL - YUL

2 stops11h 02mDelta

Mon 1/269:34 amYUL - STL

2 stops12h 09mDelta

Deal found 12/10

$580

Thu 1/299:57 amSTL - YUL

1 stop10h 20mUnited Airlines

Mon 2/26:25 pmYUL - STL

1 stop21h 05mUnited Airlines

Deal found 12/11

$649

Thu 1/86:44 pmSTL - YUL

1 stop19h 24mAmerican Airlines

Thu 1/153:50 pmYUL - STL

1 stop19h 30mAmerican Airlines

Deal found 12/11

$576

Wed 12/316:00 amSTL - YUL

1 stop17h 40mMultiple Airlines

Mon 1/55:10 pmYUL - STL

2 stops30h 23mMultiple Airlines

Deal found 12/11

$596

Thu 2/267:41 amSTL - YUL

1 stop9h 59mUnited Airlines

Mon 3/210:25 amYUL - STL

2 stops11h 35mUnited Airlines

Deal found 12/10

$656

Thu 2/266:00 amSTL - YUL

1 stop8h 05mAmerican Airlines

Sun 3/13:55 pmYUL - STL

1 stop18h 39mAmerican Airlines

Deal found 12/10

$624

Fri 3/138:24 amSTL - YUL

1 stop15h 06mMultiple Airlines

Fri 3/204:35 pmYUL - STL

1 stop15h 32mMultiple Airlines

Deal found 12/11

$629

Mon 3/168:53 pmSTL - YUL

1 stop26h 37mMultiple Airlines

Fri 3/204:35 pmYUL - STL

1 stop15h 32mMultiple Airlines

Deal found 12/11

$652

Last-minute flights from St. Louis to Pierre Elliott Trudeau Intl
Discover last-minute flight deals from St. Louis to Pierre Elliott Trudeau Intl. Data last updated December 12, 2025 and is based on user searches.

Wed 12/316:00 amSTL - YUL

1 stop17h 40mMultiple Airlines

Mon 1/54:35 pmYUL - STL

1 stop30h 58mMultiple Airlines

Deal found 12/11

$592

Tue 1/65:11 pmSTL - YUL

1 stop30h 19mMultiple Airlines

Wed 1/216:45 amYUL - STL

2 stops17h 48mMultiple Airlines

Deal found 12/10

$398

Tue 1/66:46 pmSTL - YUL

1 stop19h 22mAmerican Airlines

Wed 1/213:50 pmYUL - STL

1 stop19h 30mAmerican Airlines

Deal found 12/10

$547

Thu 1/85:11 pmSTL - YUL

1 stop30h 19mMultiple Airlines

Thu 1/156:45 amYUL - STL

2 stops16h 49mMultiple Airlines

Deal found 12/11

$526

Thu 1/86:44 pmSTL - YUL

1 stop19h 24mAmerican Airlines

Thu 1/153:50 pmYUL - STL

1 stop19h 30mAmerican Airlines

Deal found 12/11

$576

Mon 1/196:00 amSTL - YUL

1 stop8h 08mAmerican Airlines

Mon 1/263:50 pmYUL - STL

1 stop19h 30mAmerican Airlines

Deal found 12/10

$476

Mon 1/196:00 amSTL - YUL

1 stop17h 40mMultiple Airlines

Mon 1/268:00 amYUL - STL

2 stops40h 33mMultiple Airlines

Deal found 12/10

$556

Mon 1/196:35 amSTL - YUL

2 stops11h 02mDelta

Mon 1/269:34 amYUL - STL

2 stops12h 09mDelta

Deal found 12/10

$580

Wed 1/288:22 pmSTL - YUL

2 stops17h 48mMultiple Airlines

Sun 2/14:35 pmYUL - STL

1 stop17h 46mMultiple Airlines

Deal found 12/11

$367

Wed 1/286:00 amSTL - YUL

1 stop8h 08mAmerican Airlines

Sun 2/13:50 pmYUL - STL

1 stop19h 30mAmerican Airlines

Deal found 12/11

$474

One-way flights from St. Louis to Pierre Elliott Trudeau Intl
Search for one-way flight options from St. Louis to Pierre Elliott Trudeau Intl. Find affordable one-way fares based on user searches. Data last updated December 12, 2025.

Sun 1/410:57 amSTL - YUL

2 stops28h 28mMultiple Airlines

Deal found 12/10

$256

Sun 1/45:00 amSTL - YUL

1 stop16h 39mAmerican Airlines

Deal found 12/10

$337

Wed 12/175:28 pmSTL - YUL

1 stop5h 31mDelta

Deal found 12/10

$418

Wed 12/176:52 amSTL - YUL

1 stop14h 48mAmerican Airlines

Deal found 12/11

$503

Wed 12/176:30 amSTL - YUL

2 stops7h 02mUnited Airlines

Deal found 12/10

$548

Find flight deals from St. Louis to Pierre Elliott Trudeau Intl

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$367 (Kiwi.com)
One-way from	$256 (Kiwi.com)
Popular in	February
Cheapest in	July
Average price	$661
Good round-trip deal	$776 or less
Good one-way deal	$449 or less

Provider with most accurate pricing for Lambert-St Louis-Montreal Pierre Elliott Trudeau Intl flight deals.

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Provider most trusted by Cheapflights users for Lambert-St Louis-Montreal Pierre Elliott Trudeau Intl flights.

Search Deals

From Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl

Search Deals

One-way flight from Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl

Search Deals

Highest demand for flights based on searches. 24% potential increase in price ($226 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 8% potential price decrease ($54 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Price to beat on a round-trip flight from Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl.

Search Deals

Price to beat on a one-way flight from Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl.

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 2/26

6:00 am-3:05 pm

1 stop8h 05m

Montreal Pierre Elliott Trudeau Intl

Mon 3/2

3:55 pm-9:29 am

1 stop18h 34m

$536

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 1/19

6:00 am-12:40 am

1 stop17h 40m

Montreal Pierre Elliott Trudeau Intl

Mon 1/26

8:00 am-11:33 pm

2 stops40h 33m

$556

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 1/8

6:44 pm-3:08 pm

1 stop19h 24m

Montreal Pierre Elliott Trudeau Intl

Thu 1/15

3:50 pm-10:20 am

1 stop19h 30m

$576

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 1/19

6:35 am-6:37 pm

2 stops11h 02m

Montreal Pierre Elliott Trudeau Intl

Mon 1/26

9:34 am-8:43 pm

2 stops12h 09m

$580

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Wed 12/31

6:00 am-12:40 am

1 stop17h 40m

Montreal Pierre Elliott Trudeau Intl

Mon 1/5

5:10 pm-10:33 pm

2 stops30h 23m

$596

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 2/26

6:00 am-3:05 pm

1 stop8h 05m

Montreal Pierre Elliott Trudeau Intl

Sun 3/1

3:55 pm-9:34 am

1 stop18h 39m

$624

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 3/13

8:24 am-12:30 am

1 stop15h 06m

Montreal Pierre Elliott Trudeau Intl

Fri 3/20

4:35 pm-7:07 am

1 stop15h 32m

$629

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 1/29

9:57 am-9:17 pm

1 stop10h 20m

Montreal Pierre Elliott Trudeau Intl

Mon 2/2

6:25 pm-2:30 pm

1 stop21h 05m

$649

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 3/16

8:53 pm-12:30 am

1 stop26h 37m

Montreal Pierre Elliott Trudeau Intl

Fri 3/20

4:35 pm-7:07 am

1 stop15h 32m

$652

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 2/26

7:41 am-6:40 pm

1 stop9h 59m

Montreal Pierre Elliott Trudeau Intl

Mon 3/2

10:25 am-9:00 pm

2 stops11h 35m

$656

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 15 results

Compare providers for flights from St. Louis to Pierre Elliott Trudeau Intl

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Pierre Elliott Trudeau Intl in December.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Expedia	Price Accuracy2 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 Pierre Elliott Trudeau Intl Airport 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 Pierre Elliott Trudeau Intl Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-Montreal Pierre Elliott Trudeau Intl Airport flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on St. Louis-Montreal Pierre Elliott Trudeau Intl Airport 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 Pierre Elliott Trudeau Intl Airport 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 Pierre Elliott Trudeau Intl

Have a flexible travel schedule? Discover the best time to fly to Pierre Elliott Trudeau Intl 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 Pierre Elliott Trudeau Intl Airport

What is the cheapest month to book a flight from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport?

Currently, July is the cheapest month in which you can book a flight from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport (average of $218). Flying from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport in February is currently the most expensive (average of $1,289). 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 YUL?

It’s typically best to fly out from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport in the evening. Doing so could potentially save you 74% on the flight price compared to flying at noon, which is usually more expensive.

How much does it cost to fly round-trip from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport?

Reviews of airlines servicing Pierre Elliott Trudeau Intl

Get a feel of what it's like to fly with Delta, United Airlines, and American Airlines from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

7.9

Good

8,009 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

8,009 reviews

Delta

7.9

Good

8,009 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

United Airlines

7.4

Good

9,095 reviews

Delta

7.9

Good

8,009 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

American Airlines

7.2

Good

11,048 reviews

Delta

7.9

Good

8,009 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

Air Canada

7.1

Good

10,514 reviews

Delta

7.9

Good

8,009 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 Pierre Elliott Trudeau Intl?
Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Montreal Pierre Elliott Trudeau Intl. On average, Lambert-St Louis has 0 outbound flights to Montreal Pierre Elliott Trudeau Intl 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 Pierre Elliott Trudeau Intl Airport?
There are many flights that can get you from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport in 8h 05m. Fly via American Airlines or Delta to get the fastest option. There are 967 mi between St. Louis and Montreal Pierre Elliott Trudeau Intl Airport. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
What are the cheapest airlines flying from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport round-trip?
Currently priced at $212, Delta will fly you from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Air Canada - these airlines can fly you to your destination from $246 and $285, respectively. Delta is 69% cheaper than the average price of flights available within the next 90 days to this destination.
What are the most reliable airlines from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport?
Before booking your flight to Montreal Pierre Elliott Trudeau Intl Airport from St. Louis, check out the most reliable airlines to get you to your destination on time: Air Canada (79%), Jazz (79%), United Airlines( 79%).
What are the cheapest flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport?
The cheapest flight price from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport is $449. On average you can expect to pay $1,312. The most popular route, (Lambert-St Louis - Montreal Pierre Elliott Trudeau Intl), can usually be booked for $398.
Can I find deals for flights from St. Louis to Pierre Elliott Trudeau Intl that include hotel bookings?
Yes. In addition to deals on St. Louis to Pierre Elliott Trudeau Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Pierre Elliott Trudeau Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Pierre Elliott Trudeau Intl.
Can I find deals for business class flights from St. Louis to Pierre Elliott Trudeau Intl?
Yes. Cheapflights offers flight deals from St. Louis to Pierre Elliott Trudeau Intl 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 Pierre Elliott Trudeau Intl Airport?
Currently, July is the cheapest month in which you can book a flight from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport (average of $218). Flying from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport in February is currently the most expensive (average of $1,289). 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

Laval

Longueuil

Brossard

Dorval

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Top 4 airlines flying from St. Louis to Pierre Elliott Trudeau Intl

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$212	Average$681	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$246	Average$765	FlexibilityNo cancel fee	On-time69%
Air Canada	Cheapest$318	Average$715	FlexibilityNo cancel fee	On-time67%
American Airlines	Cheapest$348	Average$617	FlexibilityNo cancel fee	On-time71%

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$256+ Cheap flights from St. Louis (STL) to Pierre Elliott Trudeau Intl (YUL)

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 1/4. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Pierre Elliott Trudeau Intl with Cheapflights

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Cheap flight deals from St. Louis to Pierre Elliott Trudeau Intl

Cheapest flights from St. Louis to Pierre Elliott Trudeau IntlExplore the most affordable flight options available from St. Louis to Pierre Elliott Trudeau Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

Explore the most affordable flight options available from St. Louis to Pierre Elliott Trudeau Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

Find flight deals from St. Louis to Pierre Elliott Trudeau Intl

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

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport that are best for you.

Compare providers for flights from St. Louis to Pierre Elliott Trudeau Intl

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 Pierre Elliott Trudeau Intl in December.

Best time to book a flight from St. Louis to Pierre Elliott Trudeau Intl

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

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport

What is the cheapest month to book a flight from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport?

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

How much does it cost to fly round-trip from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport?

Reviews of airlines servicing Pierre Elliott Trudeau Intl

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Pierre Elliott Trudeau Intl. 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 Pierre Elliott Trudeau Intl?

How long is the flight from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport?

What are the cheapest airlines flying from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport round-trip?

What are the most reliable airlines from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport?

What are the cheapest flights from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport?

Can I find deals for flights from St. Louis to Pierre Elliott Trudeau Intl that include hotel bookings?

How can I find direct flights from St. Louis to Pierre Elliott Trudeau Intl?

Can I find deals for business class flights from St. Louis to Pierre Elliott Trudeau Intl?

What is the cheapest month to book a flight from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport?

Traveling to a place near Montreal Pierre Elliott Trudeau Intl Airport?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for St. Louis to Pierre Elliott Trudeau Intl

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Top 4 airlines flying from St. Louis to Pierre Elliott Trudeau Intl

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Cheapest flights from St. Louis to Pierre Elliott Trudeau Intl
Explore the most affordable flight options available from St. Louis to Pierre Elliott Trudeau Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.