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Montreal to St. Louis - Flights Starting at US$160

Book one-way or return flights from Montreal to St. Louis from as little as US$160. Choose from the popular airlines below and book your flight today!

  • One way
  • Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

We've found these cheap flights for you. You may book a one-way or round trip as per your needs.

We monitor flight fares to help you seize the best deals effortlessly

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Cheapest airlines flights from Montreal to St. Louis

View airlines operating flights from Montreal to St. Louis. Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Air Transat
From US$160
United Airlines
From US$163
Porter Airlines
From US$193
Sun Country Airlines
From US$220
WestJet
From US$231
Air Canada
From US$234
American Airlines
From US$262
Delta Air Lines
From US$270
Flair Airlines
From US$294
ANA airlines

Find more flights and airlines

Alternative Routes from Montreal to St. Louis

Discover different routes, airlines, and transfers and find the best alternative flights for your journey from Montreal to St. Louis.

  • Cheapest
    Air Transat
    YUL
    06:45
    15h 8m
    1 transfer
    STL
    20:53
    Montreal-Trudeau International Airport - St. Louis Lambert International Airport
    Wed, May 1Air Transat
    US$160
  • Air Transat
    YUL
    06:45
    15h 8m
    1 transfer
    STL
    20:53
    Montreal-Trudeau International Airport - St. Louis Lambert International Airport
    Wed, May 1Air Transat
    US$160
    Find More Flights

Frequently Asked Questions

  • When are flight tickets from Montreal (YMQ) to St. Louis (STL) the cheapest?

    Airlines adjust prices for flights from Montreal to St. Louis based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.
  • How much do flights from Montreal (YMQ) to St. Louis (STL) cost?

    According to Trip.com's data, the lowest price is around $457.
  • How long does it take to fly from Montreal (YMQ) to St. Louis (STL) and what is the distance?

    It takes around 2 hours 35 minutes to fly from Montreal (YMQ) to St. Louis (STL).
  • What is the transportation method from the main airport to downtown in St. Louis?

    • The distance from St. Louis Lambert International Airport to downtown is about 20km. It takes about 40 minutes by taxi.
  • What are the most popular airlines that fly from Montreal (YMQ) to St. Louis (STL)?

    Airlines with flights from Montreal (YMQ) to St. Louis (STL): United Airlines and Air Canada.

How to find a cheap flight from Montreal to St. Louis

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Montreal to St. Louis. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com
Montreal to St. Louis Flight Information

Cheapest nonstop flight price

$159

Cheapest round-trip ticket price

$401

Off-season for travel

February

Peak season for travel

October

Flight distance

1,567.27km

Average flight time

2 hours 35 minutes

Popular airline

American Airlines