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Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis from C$ 253

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 18/3. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — STL
22 Jan — 29 Jan1
1 adult

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

Discover tips and strategies to find the most affordable flight options for your journey from Pierre Elliott Trudeau Intl (YUL) to St. Louis (STL). 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 17 January 2025.

Round-trip from

C$ 447

One-way from

C$ 253

Popular in

December

Cheapest in

August

Average price

C$ 734
18/2-25/2
  • 18/2-25/2
  • 2 total stops
  • 33h 47m total
  • Montreal to St. Louis
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18/3
  • 18/3
  • 1 total stop
  • 11h 12m total
  • Montreal to St. Louis
Search Deals
High demand for flights, 8% potential price rise
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Best time to find cheap flights, 3% potential price drop
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Average for round-trip flights in January 2025
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Find flight deals from Pierre Elliott Trudeau Intl to St. Louis

Cheapest flights from Pierre Elliott Trudeau Intl to St. Louis
Explore the most affordable flight options available from Pierre Elliott Trudeau Intl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 January 2025.

Tue 18/26:30 a.m.YUL - STL
1 stop9h 12mMultiple Airlines
Tue 25/24:00 p.m.STL - YUL
1 stop24h 35mMultiple Airlines
Deal found 16/1C$ 447
Wed 12/27:00 a.m.YUL - STL
1 stop9h 34mDelta
Wed 19/210:20 a.m.STL - YUL
1 stop9h 43mDelta
Deal found 15/1C$ 650
Thu 20/210:59 a.m.YUL - STL
2 stops7h 46mAmerican Airlines
Mon 24/25:45 a.m.STL - YUL
2 stops10h 10mAmerican Airlines
Deal found 15/1C$ 667
Wed 12/21:30 p.m.YUL - STL
2 stops10h 39mWestJet
Wed 19/21:35 p.m.STL - YUL
1 stop6h 28mWestJet
Deal found 15/1C$ 707
Wed 12/28:35 a.m.YUL - STL
2 stops8h 03mUnited Airlines
Wed 19/21:03 p.m.STL - YUL
2 stops7h 39mUnited Airlines
Deal found 15/1C$ 779
Sun 23/210:15 a.m.YUL - STL
1 stop5h 51mAir Canada
Sat 1/31:03 p.m.STL - YUL
1 stop7h 14mAir Canada
Deal found 16/1C$ 792

Find flights from Pierre Elliott Trudeau Intl to St. Louis within your budget

Customize your flight search to find flights from Pierre Elliott Trudeau Intl to St. Louis 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 629,999 searches. Data last updated 17 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Tue 18/2

6:30 a.m.-2:42 p.m.

1 stop9h 12m

Lambert-St Louis

Tue 25/2

4:00 p.m.-5:35 p.m.

1 stop24h 35m

C$ 447

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 12/2

7:00 a.m.-3:34 p.m.

1 stop9h 34m

Lambert-St Louis

Wed 19/2

10:20 a.m.-9:03 p.m.

1 stop9h 43m

C$ 650

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 20/2

10:59 a.m.-5:45 p.m.

2 stops7h 46m

Lambert-St Louis

Mon 24/2

5:45 a.m.-4:55 p.m.

2 stops10h 10m

C$ 667

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 12/2

1:30 p.m.-11:09 p.m.

2 stops10h 39m

Lambert-St Louis

Wed 19/2

1:35 p.m.-9:03 p.m.

1 stop6h 28m

C$ 707

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 12/2

8:35 a.m.-3:38 p.m.

2 stops8h 03m

Lambert-St Louis

Wed 19/2

1:03 p.m.-9:42 p.m.

2 stops7h 39m

C$ 779

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sun 23/2

10:15 a.m.-3:06 p.m.

1 stop5h 51m

Lambert-St Louis

Sat 1/3

1:03 p.m.-9:17 p.m.

1 stop7h 14m

C$ 792

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Tue 18/3

6:30 a.m.-4:42 p.m.

1 stop11h 12m

C$ 253

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 10/2

6:03 p.m.-11:37 p.m.

1 stop6h 34m

C$ 374

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sat 1/3

7:55 a.m.-7:49 p.m.

2 stops12h 54m

C$ 431

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Tue 24/6

11:15 a.m.-3:16 p.m.

1 stop5h 01m

C$ 437

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/1

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

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

Travel insights for flights from Pierre Elliott Trudeau Intl to St. Louis

Get recent, data-driven insights about flights from Pierre Elliott Trudeau Intl to St. Louis including ideal travel times, pricing trends, and more.

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

Currently, January is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis (average of C$ 365). Flying from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis in September is currently the most expensive (average of C$ 491). 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 YUL to STL?

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

It’s optimal to fly from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis in the morning. By choosing this option you can save up to 5% on the cost of your flight, compared to a flight in the afternoon.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 56.0 - 119.0 mm per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Louis when rainfall is around 56.0 mm.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, 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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated 17 January 2025.
Delta
8.0
Very good
8,511 reviews
Check prices

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,511 reviews
Delta
8.0
Very good
8,511 reviews
Check prices

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

United Airlines
7.4
Good
8,964 reviews
Delta
8.0
Very good
8,511 reviews
Check prices

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
8,511 reviews
Check prices

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

WestJet
7.2
Good
2,824 reviews
Delta
8.0
Very good
8,511 reviews
Check prices

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air Canada
7.0
Good
8,587 reviews
Delta
8.0
Very good
8,511 reviews
Check prices

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

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

    Located just 20.4 km from the city centre, Lambert-St Louis is the airport most travellers will use when flying to St. Louis from Montreal Pierre Elliott Trudeau Intl. Booking flights from Montreal Pierre Elliott Trudeau Intl to Lambert-St Louis (STL) should be relatively easy as there are 0 daily inbound flights from Montreal Pierre Elliott Trudeau Intl from 3 different airlines.

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

    According to our current data, Delta (C$ 654), American Airlines (C$ 698), and WestJet (C$ 739) offers the cheapest pricing from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis. You may be able to fly from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis for 15% less than the average price by searching for these airlines.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Pierre Elliott Trudeau Intl to St. Louis 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 Montreal Pierre Elliott Trudeau Intl Airport to St. Louis?

    Currently, January is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis (average of C$ 365). Flying from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis in September is currently the most expensive (average of C$ 491). 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

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

Book flights to Montreal Pierre Elliott Trudeau Intl Airport if you plan to visit one of these locations
St. Peters

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Alternative routes for Pierre Elliott Trudeau Intl to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Pierre Elliott Trudeau Intl to St. Louis

Discover the top 3 airlines that operate flights from Pierre Elliott Trudeau Intl to St. Louis. 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 629,999 searches. Data last updated 17 January 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 298AverageC$ 828FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 571AverageC$ 764FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 679AverageC$ 928FlexibilityNo cancel feeOn-time60%
Search WestJet flights

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How does Cheapflights help users find flights from Pierre Elliott Trudeau Intl to St. Louis?

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Can Cheapflights find flights from Pierre Elliott Trudeau Intl to St. Louis with no change fees?

Need flexible booking options for your flight to St. Louis from Pierre Elliott Trudeau Intl? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Pierre Elliott Trudeau Intl to St. Louis become cheaper?

Yes, Cheapflights offers price alerts on Pierre Elliott Trudeau Intl to St. Louis flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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