CA $189 Cheap Flights from St. Louis (STL) to Montreal (YUL)

Popular airlines from Lambert-St. Louis International Airport (STL) to Trudeau International Airport (YUL)

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Cheap flights from St. Louis (STL) to Montreal (YUL)

Prices were available within the past 7 days and start at CA $189 for one-way flights and CA $454 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
American Airlines
American Airlines
American Airlines
American Airlines
American Airlines
Delta
United
Air Canada
WestJet

Find the cheapest month to fly from St. Louis (STL) to Montreal (YUL)

August is typically the cheapest month to fly

From CA $467 - CA $1,282 per traveller.

Graph displaying average flight prices per month

Flight from St. Louis to Montreal (STL - YUL) route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
Pierre Elliott Trudeau Intl.
Airlines serving
American Airlines, Delta, WestJet
Roundtrip price
CA $454
Distance
1547 km
Average flight time
2 hours 30 mins

St. Louis to Montreal Flights

The easy way to book your flights from St. Louis to Montreal 

With Expedia, it’s simple to find and book flights to Montreal from St. Louis whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are Air Canada, United Airlines nonstop flights to Pierre Elliott Trudeau Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from St. Louis to Montreal today, tomorrow, or this week.  

 

Save dollars with cheap flights from Lambert-St. Louis Intl., STL to Pierre Elliott Trudeau Intl., YUL 

Sort your search results by price to find great deals on your flight from St. Louis to Montreal—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Montreal from St. Louis currently is just CA $454 rising to CA $980.  

Here are more money-saving tips: 

  • Fly in October when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Montreal  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Montreal from St. Louis 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Montreal with Expedia today.

Frequently asked questions

How much is a flight from STL to YUL?
Round-trip flights from Lambert-St. Louis Intl. Airport (STL) to Montréal–Trudeau start from CA $454. This figure is based on fares listed within the last 7 days on Expedia for flights departing within the next year — book today so you don't miss out. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Lambert Field to YUL?
Every air carrier has different terms and conditions. If you decide to cancel your getaway, head to our Customer Service Portal.
How do I find cheap flights from STL to Pierre Elliott Trudeau Intl. Airport (YUL) that have flexible change policies?
Flights from Lambert Field to Montreal Airport offering flexible change policies are available with many airlines. Simply use our "No change fees" filter while searching. You'll only need to cover the difference in ticket price, without any additional fees to worry about.
How many hours is the flight from Lambert Field to Montréal–Trudeau?
There are lots of ways to make the 5 hours and 15 minutes between Lambert-St. Louis Intl. Airport (STL) and YUL go by quicker. Be productive and organize your camera roll or clear out all those unwanted emails. A snooze also helps pass the time!
How far is the flight from STL to Montreal Airport?
Expect to be cruising at altitude for a while, as the flight distance between STL and YUL is 1,550 kilometres. Create a playlist of your favourite songs before you leave home to keep yourself entertained during the journey.
Which airlines fly direct from Lambert Field to Pierre Elliott Trudeau Intl. Airport (YUL)?
Check out the airfares with Air Canada (AC) if you want to fly directly from Lambert Field to Montréal–Trudeau. This top carrier offers 0 flights monthly, so you're sure to find one that fits your schedule.
Are Lambert-St. Louis Intl. Airport (STL) to Montréal–Trudeau flight tickets cheaper when they're purchased at the last minute?
Airline tickets from Lambert Field to Pierre Elliott Trudeau Intl. Airport (YUL) are available up to 12 months prior to departure on Expedia. And although you may pick up a fantastic last-minute deal, it's never something you can count on. Also, booking your flights well in advance means you'll have more choices — and you can avoid getting stuck in the dreaded middle seat! We're always updating our fares to make sure you get the biggest bargains, so keep checking in for all the latest specials.

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