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

Popular airlines from Montreal–Trudeau Intl. Airport (YUL) to St. Louis, MO (SUS-Spirit of St. Louis)

  • notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
  • deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Alternative airports near St. Louis

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

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $594
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $594

Frequently asked questions

How much does a flight from Pierre Elliott Trudeau Intl. Airport (YUL) to Spirit of St. Louis Airport (SUS) cost?
Grab a cheap one-way flight or cheap return flight from Pierre Elliott Trudeau Intl. Airport (YUL) to Spirit of St. Louis Airport (SUS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Pierre Elliott Trudeau Intl. Airport (YUL) to Spirit of St. Louis Airport (SUS)?
The cheapest month to fly from YUL to SUS is , when there's less demand. Off-peak months are often when better flight deals are available between these airports.
What is the cheapest airline that flies from Pierre Elliott Trudeau Intl. Airport (YUL) to Spirit of St. Louis Airport (SUS)?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll fly you from YUL to SUS. Then, sort your results by "Price (lowest to highest)" to pick up a great deal.
How many flights per day from Pierre Elliott Trudeau Intl. Airport (YUL) to Spirit of St. Louis Airport (SUS)?
You'll need to catch a flight with a layover when traveling from Pierre Elliott Trudeau Intl. Airport (YUL) to Spirit of St. Louis Airport (SUS). There are no daily direct flights on this route. However, just filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from YUL to SUS?
Generally you'll have the most choice when it comes to flights on a Friday. Tuesdays are often the quietest.* But this can change depending on the season, carrier 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 Pierre Elliott Trudeau Intl. Airport (YUL) to Spirit of St. Louis Airport (SUS)?
To land at Spirit of St. Louis Airport (SUS) on time, pick a flight that takes off from Pierre Elliott Trudeau Intl. Airport (YUL) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**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 Pierre Elliott Trudeau Intl. Airport (YUL) to Spirit of St. Louis Airport (SUS) last-minute?
Last-minute bookings from YUL to SUS are usually more expensive. For the best prices, start searching for flights well ahead of time. That said, if your travel plans are flexible, you may score a cheap fare right before you leave.
Is it cheaper to book a YUL to SUS flight and hotel package?
You'll typically save money by securing a YUL to SUS flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. After selecting your preferred flights and accommodations, consider other add-ons like activities, car rentals and tours.
Can I cancel or change the date of my flight from Pierre Elliott Trudeau Intl. Airport (YUL) to Spirit of St. Louis Airport (SUS)?
If you reserved your YUL to SUS flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of fare you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for more information.

Travel information

Origin airport
Pierre Elliott Trudeau Intl.
Destination airport
Spirit of St. Louis
Distance
982 mi

Book with confidence

Montreal to St. Louis Flights

The cheapest times to fly from Montreal to St. Louis

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 Montreal to St. Louis are during the month of . You can find some of the cheapest flights from Montreal to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Montreal to St. Louis: 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 Montreal to St. Louis

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 Montreal to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from 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 Montreal to St. Louis 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 Montreal to St. Louis 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.

 

Montreal to St. Louis Flights

Explore a world of travel with Expedia

*Available to One Key members.