Cheap Flights from Denver (DEN) to Sion (SIR)

Popular airlines from Denver Intl. Airport (DEN) to Sion (SIR)

Frequently asked questions

How much does a flight from Denver Intl. Airport (DEN) to Sion Airport (SIR) cost?
Grab a cheap one-way flight or cheap return flight from Denver Intl. Airport (DEN) to Sion Airport (SIR) 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 Denver Intl. Airport (DEN) to Sion Airport (SIR)?
is the cheapest month to fly from DEN to SIR. Avoiding peak travel times is often the key to landing a great deal.
What is the cheapest airline that flies from Denver Intl. Airport (DEN) to Sion Airport (SIR)?
Expedia's filter tool lets you easily compare different airlines, travel time and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest DEN to SIR flight.
How many flights per day from Denver Intl. Airport (DEN) to Sion Airport (SIR)?
There are no daily direct flights departing from Denver Intl. Airport (DEN) 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 before you know it.
What day of the week has the most flights from DEN to SIR?
Generally you'll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can change depending 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 Denver Intl. Airport (DEN) to Sion Airport (SIR)?
To avoid possible delays on the Denver Intl. Airport (DEN) 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 Denver Intl. Airport (DEN) to Sion Airport (SIR) last-minute?
Booking your ticket from DEN to SIR just before your trip is generally more expensive. But if you're flexible with your departure dates and times, you could land a cheap last-minute fare.
Is it cheaper to book a DEN to SIR flight and hotel package?
Compared with arranging flights and hotels separately, booking a DEN to SIR flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one easy place will take the stress out of travel planning. Just pick your flights and select from our extensive range of hotels, then customize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Denver Intl. Airport (DEN) to Sion Airport (SIR)?
Generally, it's possible to reschedule or cancel your DEN to SIR flight. However, for bookings made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
Denver Intl.
Destination airport
Sion
Distance
5162 mi

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Denver to Sion Flights

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

 

The best time to book a flight from Denver to Sion

Sunday is one of the best days to book for cheap flights from Denver 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 Denver 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 Denver to Sion 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 Denver 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 Denver 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.

 

Denver to Sion Flights

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*Available to One Key members.