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Pierre Elliott Trudeau Intl

$158+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YUL
abr. 22 — abr. 291
mar. 4/22
mar. 4/29
1 adult, Economy
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Cheap flight deals from St. Louis to Pierre Elliott Trudeau Intl

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Pierre Elliott Trudeau Intl (YUL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated abril 17, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$413
(Kiwi.com)

One-way from

$158
(Kiwi.com)

Popular in

March

Cheapest in

May

Average price

$620

Good round-trip deal

$991 or less

Good one-way deal

$487 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.
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From Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl
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One-way flight from Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl
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Highest demand for flights based on searches. 19% potential increase in price ($153 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl.
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Price to beat on a one-way flight from Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl.
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Find 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 abril 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/1510:10 amSTL - YUL
2 stops13h 27mMultiple Airlines
jue. 5/226:45 amYUL - STL
1 stop18h 07mMultiple Airlines
Deal found 4/17$413
This Booking.com deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 5/21:30 pmSTL - YUL
Nonstop2h 30mAir Canada
dom. 5/46:10 pmYUL - STL
Nonstop2h 48mAir Canada
Deal found 4/16$463
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/276:00 amSTL - YUL
1 stop9h 04mDelta
mié. 5/285:00 pmYUL - STL
1 stop16h 07mDelta
Deal found 4/16$470
This American Airlines deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 6/116:04 amSTL - YUL
1 stop9h 41mAmerican Airlines
mar. 6/1712:30 pmYUL - STL
1 stop9h 00mAmerican Airlines
Deal found 4/16$489
This United Airlines deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/288:15 amSTL - YUL
1 stop6h 34mUnited Airlines
mié. 5/286:10 pmYUL - STL
Nonstop2h 48mUnited Airlines
Deal found 4/16$508
This Kiwi.com deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/245:17 pmSTL - YUL
1 stop4h 59mWestJet
sáb. 5/316:00 amYUL - STL
1 stop4h 35mWestJet
Deal found 4/16$606

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis to Pierre Elliott Trudeau Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated abril 17, 2025.
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

St. Louis

Fly to

Pierre Elliott Trudeau Intl

Route

Depart

Return

Price

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

jue. 5/15

10:10 am-12:37 am

2 stops13h 27m

Montreal Pierre Elliott Trudeau Intl

jue. 5/22

6:45 am-11:52 pm

1 stop18h 07m

$413

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

vie. 5/2

1:30 pm-5:00 pm

Nonstop2h 30m

Montreal Pierre Elliott Trudeau Intl

dom. 5/4

6:10 pm-7:58 pm

Nonstop2h 48m

$463

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

mar. 5/27

6:00 am-4:04 pm

1 stop9h 04m

Montreal Pierre Elliott Trudeau Intl

mié. 5/28

5:00 pm-8:07 am

1 stop16h 07m

$470

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

mié. 6/11

6:04 am-4:45 pm

1 stop9h 41m

Montreal Pierre Elliott Trudeau Intl

mar. 6/17

12:30 pm-8:30 pm

1 stop9h 00m

$489

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

mié. 5/28

8:15 am-3:49 pm

1 stop6h 34m

Montreal Pierre Elliott Trudeau Intl

mié. 5/28

6:10 pm-7:58 pm

Nonstop2h 48m

$508

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

sáb. 5/24

5:17 pm-11:16 pm

1 stop4h 59m

Montreal Pierre Elliott Trudeau Intl

dom. 6/1

6:00 am-9:35 am

1 stop4h 35m

$606

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

jue. 5/15

10:10 am-12:37 am

2 stops13h 27m

$158

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

jue. 9/4

7:23 am-4:40 pm

1 stop8h 17m

$194

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

mar. 5/27

6:00 am-4:04 pm

1 stop9h 04m

$196

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

jue. 9/4

1:30 pm-5:00 pm

Nonstop2h 30m

$239

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 11 results
1
2

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 April.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Montreal Pierre Elliott Trudeau Intl Airport flight deals on Cheapflights vs. FlightHub >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, January is the cheapest month in which you can book a flight from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport (average of $270). Flying from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport in July is currently the most expensive (average of $409). 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?

Find hourly flight availability from St. Louis to Pierre Elliott Trudeau Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated abril 17, 2025.

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 77% on the flight price compared to flying at noon, which is usually more expensive.

Rainfall in Pierre Elliott Trudeau Intl by month

Plan your trip to Pierre Elliott Trudeau Intl by taking into account the average rainfall totals by month.

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.

Temperature in Pierre Elliott Trudeau Intl by month

Plan your trip to Pierre Elliott Trudeau Intl by taking into account the average temperature totals by month.

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).

Reviews of airlines servicing Pierre Elliott Trudeau Intl

Get insights into the airlines that provide service to Pierre Elliott Trudeau Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Pierre Elliott Trudeau Intl. Reviews last updated abril 17, 2025.
Delta
8.0
Very good
7,916 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,916 reviews
Delta
8.0
Very good
7,916 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,667 reviews
Delta
8.0
Very good
7,916 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,916 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
WestJet
7.2
Good
2,809 reviews
Delta
8.0
Very good
7,916 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Canada
7.0
Good
9,143 reviews
Delta
8.0
Very good
7,916 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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?

    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.

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

    Currently priced at $463, Air Canada will fly you from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport and back. In addition to Air Canada, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and American Airlines - these airlines can fly you to your destination from $470 and $489, respectively. Air Canada is 27% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport one-way?

    For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $194. Users have also found prices from $196 and $239 on Delta and Air Canada, respectively.

  • 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 $259. On average you can expect to pay $2,215. The most popular route, (Lambert-St Louis - Montreal Pierre Elliott Trudeau Intl), can usually be booked for $419.

  • 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, January is the cheapest month in which you can book a flight from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport (average of $270). Flying from St. Louis to Montreal Pierre Elliott Trudeau Intl Airport in July is currently the most expensive (average of $409). 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

Traveling to a place near St. Louis?

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Laval
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Alternative routes for St. Louis to Pierre Elliott Trudeau Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from St. Louis to Pierre Elliott Trudeau Intl

Discover the top 4 airlines that operate flights from St. Louis to Pierre Elliott Trudeau Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated abril 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$246Average$610FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$272Average$613FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$330Average$736FlexibilityNo cancel feeOn-time71%
DeltaCheapest$472Average$660FlexibilityNo cancel feeOn-timeN/A

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