Cheap Flights from Sion (SIR) to Sidney (SDY)

Popular airlines from Sion (SIR) to Sidney, MT (SDY-Sidney-Richland Municipal)

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Flights from Sion (SIR) to Sidney (SDY)
Origin airport
Sion
Destination airport
Sidney-Richland Municipal
Distance
4746 mi

Sion to Sidney Flights

The cheapest times to fly from Sion to Sidney

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

 

The best time to book a flight from Sion to Sidney

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

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 Sion to Sidney 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 Sion to Sidney 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 Sion to Sidney 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 Sion Airport (SIR) to Sidney-Richland Municipal Airport (SDY) cost?
Secure a cheap one-way flight or cheap return flight from Sion Airport (SIR) to Sidney-Richland Municipal Airport (SDY) 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 Sion Airport (SIR) to Sidney-Richland Municipal Airport (SDY)?
Flying in may help you find better deals, as it's the cheapest month for flights between SIR and SDY. You'll often find the lowest fares during off-peak months.
What is the cheapest airline that flies from Sion Airport (SIR) to Sidney-Richland Municipal Airport (SDY)?
To find the cheapest airline that'll fly you from SIR to SDY, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Sion Airport (SIR) to Sidney-Richland Municipal Airport (SDY)?
There are no daily direct flights from Sion Airport (SIR) to Sidney-Richland Municipal Airport (SDY). But you can book flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be cruising above the clouds in no time at all.
What day of the week has the most flights from SIR to SDY?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can change depending on a range of factors, such as the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Sion Airport (SIR) to Sidney-Richland Municipal Airport (SDY)?
To avoid potential delays on the Sion Airport (SIR) to Sidney-Richland Municipal Airport (SDY) route, aim to travel before 3 PM. Later departures 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 Sion Airport (SIR) to Sidney-Richland Municipal Airport (SDY) last-minute?
Last-minute fares from SIR to SDY are generally more expensive. To secure the lowest prices, start searching for flights ahead of time. That said, if you can play around with your travel dates, it's possible to score a cheap fare right before your trip.
Is it cheaper to book a SIR to SDY flight and hotel package?
Compared with arranging flights and hotels separately, booking a SIR to SDY flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one convenient place takes the hassle out of travel planning. Simply pick your flights and choose from our extensive range of stays, then tailor your trip with extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Sion Airport (SIR) to Sidney-Richland Municipal Airport (SDY)?
Typically, you can reschedule or cancel your SIR to SDY flight. However, additional charges may apply, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline's policies and fees on flight changes, or if you need more details, go to our Customer Service portal.

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