$514 Cheap Flights from St. Louis (STL) to Montreal Metropolitan Airport (YHU)

View $514 flight on Mon, Sep 21, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Montreal Metropolitan Airport (YHU)

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Cheap Flights from St. Louis to Montreal Metropolitan Airport (STL-YHU)

Prices were available within the past 7 days and start at $514 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alternative airports near Montreal

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Pierre Elliott Trudeau Intl. YUL. Cheapest and Closest option available. Average driving time to city center is 17 minutes. Flights from $686
YUL
Pierre Elliott Trudeau Intl.
CheapestClosest
Average driving time to city center17 min
Flights from $686

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to St. Hubert Airport (YHU) cost?
Grab a cheap one-way flight from $514 or cheap return flight from Lambert-St. Louis Intl. Airport (STL) to St. Hubert Airport (YHU) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to St. Hubert Airport (YHU)?
Planning your trip for can help you save, as it's the cheapest month for flights between STL and YHU. You'll typically find the lowest prices during off-peak months.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to St. Hubert Airport (YHU)?
Use the filter tool on Expedia to compare airlines and find the most affordable carrier that'll take you from STL to YHU. Then, sort your results by "Price (lowest to highest)" to pick up the best deal available.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to St. Hubert Airport (YHU)?
There aren't any daily nonstop flights departing from Lambert-St. Louis Intl. Airport (STL) to St. Hubert Airport (YHU). But you can choose flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be soaring above the clouds before you know it.
What day of the week has the most flights from STL to YHU?
Usually you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* However, this can change based on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to St. Hubert Airport (YHU)?
Book a flight from Lambert-St. Louis Intl. Airport (STL) to St. Hubert Airport (YHU) that takes off before 3 PM to reduce the risk of delays and cancellations. Departures after this hour are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to St. Hubert Airport (YHU) last-minute?
Last-minute bookings from STL to YHU are usually more expensive. To lock in the lowest prices, start searching for flights ahead of time. That said, if you're flexible with your travel dates, it's possible to land a cheap ticket right before you leave.
Is it cheaper to book a STL to YHU flight and hotel package?
Securing a STL to YHU flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip in one place. Pick from our extensive range of hotels and then add flights, car rentals and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to St. Hubert Airport (YHU)?
Usually, it's possible to cancel or reschedule your STL to YHU flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Montreal Metropolitan Airport
Distance
983 mi

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St. Louis to Montreal Metropolitan Airport Flights

The cheapest times to fly from St. Louis to Montreal Metropolitan Airport

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Montreal Metropolitan Airport are during the month of . You can find some of the cheapest flights from St. Louis to Montreal Metropolitan Airport with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Montreal Metropolitan Airport

Sunday is one of the best days to book for cheap flights from St. Louis to Montreal Metropolitan Airport: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Montreal Metropolitan Airport

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Montreal Metropolitan Airport in 2025. You can also book with separate airlines for your outbound and return journeys, from $514 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Montreal Metropolitan Airport flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Montreal Metropolitan Airport airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Montreal Metropolitan Airport Flights

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