$543 Cheap Flights from Dallas (DFW) to Sion (SIR)

View $543 flight on Tue, Nov 25, 2025Opens in a new window

Popular airlines from Dallas-Fort Worth Intl. Airport (DFW) to Sion (SIR)

Cheap Flights from Dallas to Sion (DFW-SIR)

Prices were available within the past 7 days and start at $543 for one-way flights and $877 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Mar 10 - Wed, Mar 18
DFW
Dallas
SIR
Sion
$877 Roundtrip, found 3 days ago
$877
Roundtrip
found 3 days ago
Select United flight, departing Tue, Mar 10 from Dallas to Sion, returning Wed, Mar 18, priced at $877 found 3 days ago
United
Tue, Mar 10 - Wed, Mar 18
DFW
Dallas
SIR
Sion
$969 Roundtrip, found 3 days ago
$969
Roundtrip
found 3 days ago
Select United flight, departing Tue, Mar 10 from Dallas to Sion, returning Wed, Mar 18, priced at $969 found 3 days ago
United
Mon, Jan 5 - Thu, Jan 15
DFW
Dallas
SIR
Sion
$1,364 Roundtrip, found 3 days ago
$1,364
Roundtrip
found 3 days ago
Select United flight, departing Mon, Jan 5 from Dallas to Sion, returning Thu, Jan 15, priced at $1,364 found 3 days ago
United
Mon, Jan 5 - Thu, Jan 15
DFW
Dallas
SIR
Sion
$1,368 Roundtrip, found 3 days ago
$1,368
Roundtrip
found 3 days ago
Select United flight, departing Mon, Jan 5 from Dallas to Sion, returning Thu, Jan 15, priced at $1,368 found 3 days ago
United
Fri, Mar 13 - Wed, Mar 18
DFW
Dallas
SIR
Sion
$1,386 Roundtrip, found 3 days ago
$1,386
Roundtrip
found 3 days ago
Select United flight, departing Fri, Mar 13 from Dallas to Sion, returning Wed, Mar 18, priced at $1,386 found 3 days ago
United
Fri, Mar 13 - Wed, Mar 18
DFW
Dallas
SIR
Sion
$1,447 Roundtrip, found 3 days ago
$1,447
Roundtrip
found 3 days ago
Select United flight, departing Fri, Mar 13 from Dallas to Sion, returning Wed, Mar 18, priced at $1,447 found 3 days ago
United
Mon, Jan 5 - Thu, Jan 15
DFW
Dallas
SIR
Sion
$1,505 Roundtrip, found 3 days ago
$1,505
Roundtrip
found 3 days ago
Select United flight, departing Mon, Jan 5 from Dallas to Sion, returning Thu, Jan 15, priced at $1,505 found 3 days ago
United
Mon, Jan 5 - Thu, Jan 15
DFW
Dallas
SIR
Sion
$1,509 Roundtrip, found 3 days ago
$1,509
Roundtrip
found 3 days ago
Select United flight, departing Mon, Jan 5 from Dallas to Sion, returning Thu, Jan 15, priced at $1,509 found 3 days ago
United
Fri, Mar 13 - Wed, Mar 18
DFW
Dallas
SIR
Sion
$1,586 Roundtrip, found 3 days ago
$1,586
Roundtrip
found 3 days ago
Select United flight, departing Fri, Mar 13 from Dallas to Sion, returning Wed, Mar 18, priced at $1,586 found 3 days ago
United
Fri, Mar 13 - Wed, Mar 18
DFW
Dallas
SIR
Sion
$1,647 Roundtrip, found 3 days ago
$1,647
Roundtrip
found 3 days ago
Select United flight, departing Fri, Mar 13 from Dallas to Sion, returning Wed, Mar 18, priced at $1,647 found 3 days ago
United
Tue, Nov 25 - Sat, Nov 29
DFW
Dallas
SIR
Sion
$2,000 Roundtrip, found 3 days ago
$2,000
Roundtrip
found 3 days ago
Select United flight, departing Tue, Nov 25 from Dallas to Sion, returning Sat, Nov 29, priced at $2,000 found 3 days ago
United
Tue, Nov 25 - Sat, Nov 29
DFW
Dallas
SIR
Sion
$2,005 Roundtrip, found 3 days ago
$2,005
Roundtrip
found 3 days ago
Select United flight, departing Tue, Nov 25 from Dallas to Sion, returning Sat, Nov 29, priced at $2,005 found 3 days ago

Frequently asked questions

How much does a flight from Dallas-Fort Worth Intl. Airport (DFW) to Sion Airport (SIR) cost?
Secure a cheap one-way flight from $543 or cheap return flight from $877 from Dallas-Fort Worth Intl. Airport (DFW) 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 Dallas-Fort Worth Intl. Airport (DFW) to Sion Airport (SIR)?
Planning your getaway for March can help you save, as it's the cheapest month for flights between DFW and SIR. You'll often find the lowest fares during the off-season.
What is the cheapest airline that flies from Dallas-Fort Worth Intl. Airport (DFW) to Sion Airport (SIR)?
To find the cheapest airline that'll fly you from DFW to SIR, use Expedia's filter tool. Tailor your search based on what matters most to you, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Dallas-Fort Worth Intl. Airport (DFW) to Sion Airport (SIR)?
There are no daily direct flights departing from Dallas-Fort Worth Intl. Airport (DFW) to Sion Airport (SIR). But you can opt for flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be cruising above the clouds in no time.
What day of the week has the most flights from DFW to SIR?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can change based on various factors, such as the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Dallas-Fort Worth Intl. Airport (DFW) to Sion Airport (SIR)?
To avoid possible delays on the Dallas-Fort Worth Intl. Airport (DFW) to Sion Airport (SIR) route, travel before 3 PM. Flights after this time are 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 Dallas-Fort Worth Intl. Airport (DFW) to Sion Airport (SIR) last-minute?
Booking your flight from DFW to SIR shortly before your getaway is typically more expensive. However, if there's some wiggle room with your departure dates and times, you could land a cheap last-minute fare.
Is it cheaper to book a DFW to SIR flight and hotel package?
Booking a DFW to SIR flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Choose from our extensive range of accommodations and then add activities, flights and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Dallas-Fort Worth Intl. Airport (DFW) to Sion Airport (SIR)?
Typically, it's possible to cancel or reschedule your DFW to SIR flight. However, for bookings made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
Dallas-Fort Worth Intl.
Destination airport
Sion
Roundtrip price
$876
Distance
5226 mi

Book with confidence

Dallas to Sion Flights

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

 

The best time to book a flight from Dallas to Sion

Sunday is one of the best days to book for cheap flights from Dallas 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 Dallas 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 Dallas to Sion in 2025. You can also book with separate airlines for your outbound and return journeys, from $543 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 Dallas 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 Dallas 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.

 

Dallas to Sion Flights

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*Available to One Key members.