$2,292 Cheap Flights from Montreal (YUL) to Sion (SIR)

View $2,292 flight on Fri, Mar 6, 2026Opens in a new window

Cheap Flights from Montreal to Sion (YUL-SIR)

Prices were available within the past 7 days and start at $2,292 for one-way flights and $3,648 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, Mar 6 - Sat, Mar 14
YUL
Montreal
SIR
Sion
$3,648 Roundtrip, found 1 day ago
$3,648
Roundtrip
found 1 day ago
Select United flight, departing Fri, Mar 6 from Montreal to Sion, returning Sat, Mar 14, priced at $3,648 found 1 day ago
United
Fri, Mar 6 - Sat, Mar 14
YUL
Montreal
SIR
Sion
$3,878 Roundtrip, found 1 day ago
$3,878
Roundtrip
found 1 day ago
Select United flight, departing Fri, Mar 6 from Montreal to Sion, returning Sat, Mar 14, priced at $3,878 found 1 day ago
United
Fri, Mar 6 - Sat, Mar 14
YUL
Montreal
SIR
Sion
$3,936 Roundtrip, found 1 day ago
$3,936
Roundtrip
found 1 day ago
Select United flight, departing Fri, Mar 6 from Montreal to Sion, returning Sat, Mar 14, priced at $3,936 found 1 day ago
United
Fri, Mar 6 - Sat, Mar 14
YUL
Montreal
SIR
Sion
$4,164 Roundtrip, found 1 day ago
$4,164
Roundtrip
found 1 day ago
Select United flight, departing Fri, Mar 6 from Montreal to Sion, returning Sat, Mar 14, priced at $4,164 found 1 day ago
United
Fri, Mar 6 - Sat, Mar 14
YUL
Montreal
SIR
Sion
$4,222 Roundtrip, found 1 day ago
$4,222
Roundtrip
found 1 day ago
Select United flight, departing Fri, Mar 6 from Montreal to Sion, returning Sat, Mar 14, priced at $4,222 found 1 day ago
United
Fri, Mar 6 - Sat, Mar 14
YUL
Montreal
SIR
Sion
$4,450 Roundtrip, found 1 day ago
$4,450
Roundtrip
found 1 day ago
Select United flight, departing Fri, Mar 6 from Montreal to Sion, returning Sat, Mar 14, priced at $4,450 found 1 day ago
United
Fri, Mar 6 - Sat, Mar 14
YUL
Montreal
SIR
Sion
$5,159 Roundtrip, found 1 day ago
$5,159
Roundtrip
found 1 day ago
Select United flight, departing Fri, Mar 6 from Montreal to Sion, returning Sat, Mar 14, priced at $5,159 found 1 day ago
United
Fri, Mar 6 - Sat, Mar 14
YUL
Montreal
SIR
Sion
$5,301 Roundtrip, found 1 day ago
$5,301
Roundtrip
found 1 day ago
Select United flight, departing Fri, Mar 6 from Montreal to Sion, returning Sat, Mar 14, priced at $5,301 found 1 day ago
United
Fri, Mar 6 - Sat, Mar 14
YUL
Montreal
SIR
Sion
$5,445 Roundtrip, found 1 day ago
$5,445
Roundtrip
found 1 day ago
Select United flight, departing Fri, Mar 6 from Montreal to Sion, returning Sat, Mar 14, priced at $5,445 found 1 day ago
Flights from Montreal (YUL) to Sion (SIR)
Origin airport
Pierre Elliott Trudeau Intl.
Destination airport
Sion
Roundtrip price
$3,647
Distance
3721 mi

Montreal to Sion Flights

The cheapest times to fly from Montreal to Sion

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

 

The best time to book a flight from Montreal to Sion

Sunday is one of the best days to book for cheap flights from Montreal to Sion: 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 Sion

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 Sion in 2025. You can also book with separate airlines for your outbound and return journeys, from $2,292 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 Sion 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 Sion 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.

 

Frequently asked questions

How much does a flight from Pierre Elliott Trudeau Intl. Airport (YUL) to Sion Airport (SIR) cost?
Secure a cheap one-way flight from $2,292 or cheap return flight from $3,648 from Pierre Elliott Trudeau Intl. Airport (YUL) to Sion Airport (SIR) 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 Pierre Elliott Trudeau Intl. Airport (YUL) to Sion Airport (SIR)?
Planning your trip for March is a good way to save, as it's the cheapest month for flights between YUL and SIR. You'll typically find the lowest prices during the off-season.
What is the cheapest airline that flies from Pierre Elliott Trudeau Intl. Airport (YUL) to Sion Airport (SIR)?
Use the filters on Expedia to compare different airlines and find the cheapest carrier that'll fly you from YUL to SIR. Then, sort your results by "Price (lowest to highest)" to snap up a good deal.
How many flights per day from Pierre Elliott Trudeau Intl. Airport (YUL) to Sion Airport (SIR)?
There aren't any daily nonstop flights available from Pierre Elliott Trudeau Intl. Airport (YUL) to Sion Airport (SIR). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be on your way in no time at all.
What day of the week has the most flights from YUL to SIR?
Generally you'll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* However, this can vary based on the time of year, 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 Pierre Elliott Trudeau Intl. Airport (YUL) to Sion Airport (SIR)?
To avoid possible delays on the Pierre Elliott Trudeau Intl. Airport (YUL) to Sion Airport (SIR) route, aim to fly before 3 PM. Later flights have a 22% higher chance of cancellation.**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 Sion Airport (SIR) last-minute?
Last-minute bookings from YUL to SIR are generally more expensive. To secure the best prices, start looking for flights as early as possible. That being said, if your travel plans are flexible, it's possible to find a cheap fare just before your departure.
Is it cheaper to book a YUL to SIR flight and hotel package?
Compared with arranging flights and hotels separately, booking a YUL to SIR flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one convenient place takes the hassle out of travel planning. Simply secure your flights and select from our extensive range of hotels, then customize your trip with other add-ons like car rentals and activities.
Can I cancel or change the date of my flight from Pierre Elliott Trudeau Intl. Airport (YUL) to Sion Airport (SIR)?
If you booked your YUL to SIR flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the fare type 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, head to our Customer Service portal for more details.

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*Available to One Key members.