Cheap Flights from San Diego (SAN) to Sion (SIR)

Popular airlines from San Diego Intl. Airport (SAN) to Sion (SIR)

Cheap Flights from San Diego to Sion (SAN-SIR)

Prices were available within the past 7 days and start at for one-way flights and $1,267 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Jan 17 - Sat, Jan 24
SAN
San Diego
SIR
Sion
$1,267 Roundtrip, found 1 day ago
$1,267
Roundtrip
found 1 day ago
Select United flight, departing Sat, Jan 17 from San Diego to Sion, returning Sat, Jan 24, priced at $1,267 found 1 day ago

Frequently asked questions

How much does a flight from San Diego Intl. Airport (SAN) to Sion Airport (SIR) cost?
Snag a cheap one-way flight or cheap return flight from $1,267 from San Diego Intl. Airport (SAN) to Sion Airport (SIR) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from San Diego Intl. Airport (SAN) to Sion Airport (SIR)?
The cheapest month to fly from SAN to SIR is January, when there's less demand. Off-peak months are often when airlines offer lower prices between these airports.
What is the cheapest airline that flies from San Diego Intl. Airport (SAN) to Sion Airport (SIR)?
To find the cheapest airline flying from SAN 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 discover the cheapest flight right away.
How many flights per day from San Diego Intl. Airport (SAN) to Sion Airport (SIR)?
You'll have to book a flight with a layover if you're traveling from San Diego Intl. Airport (SAN) to Sion Airport (SIR). Direct flights don't operate daily on this route. However, just filter your search to include one or more stops to discover the best option for your trip.
What day of the week has the most flights from SAN to SIR?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from San Diego Intl. Airport (SAN) to Sion Airport (SIR)?
Select a flight from San Diego Intl. Airport (SAN) to Sion Airport (SIR) that takes off before 3 PM to reduce the risk of cancellations. Departures later than this have a 22% higher chance of being canceled, on average.**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 San Diego Intl. Airport (SAN) to Sion Airport (SIR) last-minute?
Booking your flight from SAN to SIR right before your trip is usually more expensive. However, if you're flexible with your schedule, you could snag a cheap last-minute fare.
Is it cheaper to book a SAN to SIR flight and hotel package?
You'll typically save money by booking a SAN to SIR flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. Once you've selected your ideal accommodations and flights, you can add extras such as activities, car rentals and tours.
Can I cancel or change the date of my flight from San Diego Intl. Airport (SAN) to Sion Airport (SIR)?
Generally, it's possible to reschedule or cancel your SAN to SIR flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
San Diego Intl.
Destination airport
Sion
Roundtrip price
$1,267
Distance
5978 mi

Book with confidence

San Diego to Sion Flights

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

 

The best time to book a flight from San Diego to Sion

Sunday is one of the best days to book for cheap flights from San Diego 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 San Diego 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 San Diego 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 San Diego 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 San Diego 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.

 

San Diego to Sion Flights

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*Available to One Key members.