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

View AU$381 flight on Wed, 10 Dec 2025Opens in a new window

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 for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

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

August is typically the cheapest month to fly

From AU$511 - AU$1,458 per traveller.

Frequently asked questions

How much is a flight from St. Louis Lambert International Airport to Montréal–Trudeau?
Start packing your bags, because round-trip flights between Lambert Field and YUL start from . That's based on airfares listed within the last 7 days on Expedia for flights departing within the next year. Prices can move quickly, so book now to nab the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from STL to Pierre Elliott Trudeau Intl. Airport (YUL)?
The majority of flights can be cancelled online, but whether you are charged a fee differs between airlines. If you do need to cancel your getaway, follow the easy instructions in the Customer Service Portal.
How do I find cheap flights from Lambert-St. Louis Intl. Airport (STL) to Montreal Airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for St. Louis Lambert International Airport to YUL flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Lambert Field to Montreal Airport?
The flight distance from Lambert Field to Montréal–Trudeau is 1 550 kilometres. Pack yourself a snack, a drink and an interesting book to read. Keep yourself busy in the air and the hours will zip by.
Which airlines fly direct from St. Louis Lambert International Airport to Pierre Elliott Trudeau Intl. Airport (YUL)?
If you want to travel straight from St. Louis Lambert International Airport to YUL, you'll need to book a flight with one or more stops. Unfortunately, there are no airlines that fly directly on this route.
Are Lambert Field to Montreal Airport flight tickets cheaper when they're purchased at the last minute?
Flight prices go up and down like a yo-yo, so it's no sure thing. While last-minute flight deals between STL and YUL are possible, it's also a good idea to keep an eye on prices well before you fly. In fact, some carriers advertise their prices up to a year before the departure date. Expedia is continuously updating the best bargains around, so keep checking and be ready to lock in your seat when the price is right.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Pierre Elliott Trudeau Intl.
Distance
1547 km
Average flight time
2 hours 30 mins

Book with confidence

Your quick guide to flights from St. Louis to Montreal

Pick up great flights from St. Louis to Montreal

With Expedia, you have your pick of flights a day with 20 airlines covering flights from St. Louis to Montreal. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from St. Louis to Montreal that take around hours.

Find cheap flights from St. Louis to Montreal

From the great flight deals with prices currently ranging from to , you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from St. Louis to Montreal around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Montreal is normally in .

Reasons to book your flight from St. Louis to Montreal with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from St. Louis to Montreal across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Montreal right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Your quick guide to flights from St. Louis to Montreal

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