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Cheap flights from Montreal to St. Louis from C$ 237

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 12/2. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — STL
13 Jan — 20 Jan1
1 adult

Cheap flight deals from Montreal to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Montreal (YMQ) 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 8 January 2025.

Round-trip from

C$ 425

One-way from

C$ 241

Popular in

December

Cheapest in

April

Average price

C$ 832
4/2-11/2
  • 4/2-11/2
  • 2 total stops
  • 34h 00m total
  • Montreal to St. Louis
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18/3
  • 18/3
  • 1 total stop
  • 10h 52m total
  • Montreal to St. Louis
Search Deals
High demand for flights, 12% potential price rise
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Best time to find cheap flights, 2% potential price drop
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Average for round-trip flights in January 2025
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Find flight deals from Montreal to St. Louis

Cheapest flights from Montreal to St. Louis
Explore the most affordable flight options available from Montreal to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 January 2025.

Tue 4/26:30 a.m.YUL - STL
1 stop9h 13mMultiple Airlines
Tue 11/23:48 p.m.STL - YUL
1 stop24h 47mMultiple Airlines
Deal found 7/1C$ 425
Sat 24/57:00 a.m.YUL - STL
1 stop11h 53mDelta
Wed 28/56:00 a.m.STL - YUL
1 stop8h 15mDelta
Deal found 8/1C$ 627
Sat 15/27:14 a.m.YUL - STL
1 stop5h 45mAmerican Airlines
Tue 18/27:30 a.m.STL - YUL
1 stop5h 05mAmerican Airlines
Deal found 8/1C$ 670
Sat 8/26:00 a.m.YUL - STL
1 stop7h 27mWestJet
Wed 12/21:35 p.m.STL - YUL
2 stops10h 04mWestJet
Deal found 6/1C$ 696
Sat 1/27:00 a.m.YUL - STL
2 stops8h 14mUnited Airlines
Mon 3/21:02 p.m.STL - YUL
2 stops7h 40mUnited Airlines
Deal found 7/1C$ 769
Sat 24/56:10 p.m.YUL - STL
Nonstop2h 51mAir Canada
Wed 28/510:30 a.m.STL - YUL
1 stop6h 29mAir Canada
Deal found 8/1C$ 779

Find flights from Montreal to St. Louis within your budget

Customize your flight search to find flights from Montreal 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 8 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 4/2

6:30 a.m.-2:43 p.m.

1 stop9h 13m

Lambert-St Louis

Tue 11/2

3:48 p.m.-12:45 a.m.

1 stop7h 57m

C$ 450

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sat 24/5

7:00 a.m.-5:53 p.m.

1 stop11h 53m

Lambert-St Louis

Wed 28/5

6:00 a.m.-3:15 p.m.

1 stop8h 15m

C$ 627

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sat 15/2

7:14 a.m.-11:59 a.m.

1 stop5h 45m

Lambert-St Louis

Tue 18/2

7:30 a.m.-1:35 p.m.

1 stop5h 05m

C$ 670

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 7/2

6:45 a.m.-12:27 p.m.

2 stops30h 42m

Lambert-St Louis

Mon 10/2

6:06 a.m.-9:03 p.m.

1 stop13h 57m

C$ 717

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sat 8/2

1:15 p.m.-9:45 p.m.

2 stops9h 30m

Lambert-St Louis

Wed 12/2

1:02 p.m.-9:42 p.m.

2 stops7h 40m

C$ 770

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sat 24/5

6:10 p.m.-8:01 p.m.

Nonstop2h 51m

Lambert-St Louis

Wed 28/5

10:30 a.m.-5:59 p.m.

1 stop6h 29m

C$ 779

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 12/2

3:55 p.m.-2:42 p.m.

1 stop23h 47m

C$ 237

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sat 15/3

7:14 a.m.-12:00 p.m.

1 stop5h 46m

C$ 391

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 12/2

1:30 p.m.-2:50 p.m.

2 stops26h 20m

C$ 407

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Tue 18/3

10:54 a.m.-5:54 p.m.

2 stops8h 00m

C$ 408

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/1

Showing 1-10 of 11 results
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Best time to book a flight from Montreal to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Montreal 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 Montreal to St. Louis

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

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

Currently, January is the cheapest month in which you can book a flight from Montreal to St. Louis (average of C$ 365). Flying from Montreal 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 YMQ to STL?

Find hourly flight availability from Montreal 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 8 January 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 3% on flights from Montreal to St. Louis by exploring options for tickets in the morning.

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 8 January 2025.
Delta
8.0
Very good
8,499 reviews
Check prices

Entertainment

7.9

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

8.0

Food

7.3

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
8,499 reviews
Delta
8.0
Very good
8,499 reviews
Check prices

Entertainment

7.9

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

8.0

Food

7.3

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
8,938 reviews
Delta
8.0
Very good
8,499 reviews
Check prices

Entertainment

7.9

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

8.0

Food

7.3

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
8,499 reviews
Check prices

Entertainment

7.9

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

8.0

Food

7.3

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
2,818 reviews
Delta
8.0
Very good
8,499 reviews
Check prices

Entertainment

7.9

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

8.0

Food

7.3

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 Montreal 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?

    Most people fly into Lambert-St Louis (STL) if they book a flight to St. Louis from Montreal. On average, Lambert-St Louis has 0 inbound flights from Montreal per day from 3 airlines. Lambert-St Louis is conveniently located just 20.4 km from St. Louis’s city centre.

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

    Currently priced at C$ 632, Delta will fly you from Montreal to St. Louis and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and WestJet - these airlines can fly you to your destination from C$ 670 and C$ 696, respectively. You may be able to fly from Montreal to St. Louis for 12% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Montreal to St. Louis one-way?

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at C$ 369. WestJet flights start at C$ 405 while deals on American Airlines start at C$ 408 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Montreal 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 to St. Louis?

    Currently, January is the cheapest month in which you can book a flight from Montreal to St. Louis (average of C$ 365). Flying from Montreal 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

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Montreal to St. Louis

Discover the top 3 airlines that operate flights from Montreal 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 8 January 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 298AverageC$ 825FlexibilityNo 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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Certainly. Search results for flights to St. Louis from Montreal shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Montreal to St. Louis become cheaper?

Not ready to book yet? You can track prices for flights from Montreal to St. Louis on Cheapflights with our Price Alert feature and get notified when better prices are available.

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