Cheap Flights from London (LHR) to Sion (SIR)

Popular airlines from Heathrow Airport (LHR) to Sion (SIR)

Frequently asked questions

How much does a flight from Heathrow Airport (LHR) to Sion Airport (SIR) cost?
Secure a cheap one-way flight or cheap return flight from Heathrow Airport (LHR) 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 Heathrow Airport (LHR) to Sion Airport (SIR)?
The cheapest month to fly from LHR to SIR is , when there's less demand. Off-peak season is generally when airlines offer better prices between these airports.
What is the cheapest airline that flies from Heathrow Airport (LHR) to Sion Airport (SIR)?
To find the cheapest airline that'll fly you from LHR to SIR, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Heathrow Airport (LHR) to Sion Airport (SIR)?
You'll need to book a flight with a layover when traveling from Heathrow Airport (LHR) to Sion Airport (SIR). There are no daily direct flights on this route. However, just filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from LHR to SIR?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Heathrow Airport (LHR) to Sion Airport (SIR)?
To land at Sion Airport (SIR) on time, select a flight that leaves Heathrow Airport (LHR) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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 Heathrow Airport (LHR) to Sion Airport (SIR) last-minute?
Booking your ticket from LHR to SIR right before your trip is usually more expensive. But if there's some wiggle room with your travel times and dates, you could grab a cheap last-minute fare.
Is it cheaper to book a LHR to SIR flight and hotel package?
You'll typically save money by securing a LHR 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 easy to manage everything in one convenient place. Once you've selected your ideal accommodations and flights, you can add extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Heathrow Airport (LHR) to Sion Airport (SIR)?
Generally, it's possible to reschedule or cancel your LHR 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 possible and whether any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Origin airport
Heathrow
Destination airport
Sion
Distance
506 mi

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London to Sion Flights

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

 

The best time to book a flight from London to Sion

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

 

London to Sion Flights

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*Available to One Key members.