Title: Flights from London Heathrow to Sion (LHR to SIR) - Expedia.co.uk ![Adobe](https://images.trvl-media.com/place/9869/40df6fea-c548-4064-9088-2549769f6f5f.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/9869/40df6fea-c548-4064-9088-2549769f6f5f.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap Flights from London (LHR) to Sion (SIR) - [Return](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travellers Adults ChildrenAges 2 to 17 InfantsYounger than 2 EconomyPremium economyBusiness classFirst class Leaving from Going to Departing Returning Add a place to stay Add a car Direct flights only ## Popular airlines from Heathrow Airport (LHR) to Sion (SIR) - ![British Airways](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_BA.svg) British Airways [](https://www.expedia.co.uk/Flights-Search?leg1=from:lhr,to:sir,departure:14/10/2025TANYT&leg2=from:sir,to:lhr,departure:21/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"BA"}}]) - ![easyJet](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_U2.svg) easyJet [](https://www.expedia.co.uk/Flights-Search?leg1=from:lhr,to:sir,departure:14/10/2025TANYT&leg2=from:sir,to:lhr,departure:21/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"U2"}}]) - ![Lufthansa](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_LH.svg) Lufthansa [](https://www.expedia.co.uk/Flights-Search?leg1=from:lhr,to:sir,departure:14/10/2025TANYT&leg2=from:sir,to:lhr,departure:21/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LH"}}]) - ![Ryanair](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_FR.svg) Ryanair [](https://www.expedia.co.uk/Flights-Search?leg1=from:lhr,to:sir,departure:14/10/2025TANYT&leg2=from:sir,to:lhr,departure:21/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"FR"}}]) - ![American Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:lhr,to:sir,departure:14/10/2025TANYT&leg2=from:sir,to:lhr,departure:21/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![Jet2](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_LS.svg) Jet2 [](https://www.expedia.co.uk/Flights-Search?leg1=from:lhr,to:sir,departure:14/10/2025TANYT&leg2=from:sir,to:lhr,departure:21/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LS"}}]) - ![Swiss International Air Lines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_LX.svg) Swiss International Air Lines [](https://www.expedia.co.uk/Flights-Search?leg1=from:lhr,to:sir,departure:14/10/2025TANYT&leg2=from:sir,to:lhr,departure:21/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LX"}}]) - ## Plan, book, fly with confidence - ### Be in the know Get alerts if flight prices drop or rise\* - ### Book smarter Save up to 25% on select hotels after you book a flight\* - ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.co.uk/login) ## Frequently asked questions ### How much is a flight from LHR to Sion Airport (SIR)? > Pack your bags, because round-trip flights from LHR to Sion Airport start from . That's based on fares advertised within the last 7 days on Expedia for flights departing within the next year. Prices can increase quickly, so book now to lock in the best deal. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from LHR to SIR? > Most flights can be conveniently cancelled online, but whether you incur a fee differs between airlines. If you do need to cancel your holiday, follow the easy instructions in the [Customer Service Portal](https://www.expedia.co.uk/service/?langid=1033). ### How do I find cheap flights from Heathrow Airport (LHR) to Sion Airport that have flexible change policies? > Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Heathrow Airport (LHR) to Sion Airport (SIR) flights, you'll see a "no change fees" filter for you to select. ### How far is the flight from Heathrow Airport (LHR) to SIR? > You might not get through a whole movie on this flight — it's just 820 kilometres from Hounslow to Sion. Sit down, order some snacks and you'll be there in next to no time. ### Which airlines fly direct from Heathrow Airport to SIR? > There are no direct flights, so you'll have to make at least one stop between Heathrow Airport (LHR) and SIR. Take advantage of the layover time to stretch your legs and grab a bite to eat. ### Are Heathrow Airport (LHR) to Sion Airport (SIR) flight tickets cheaper when they're purchased at the last minute? > Late planners can occasionally score a bargain, with some of the cheapest airfares from London Heathrow to Sion Airport showing up a few weeks before the departure date. If you'd rather plan ahead, Expedia compares and updates all the best flight deals frequently — as early as a year in advance in some cases. It depends on the carrier though, as not every airline advertises prices so far in advance. ## Travel information | Origin airport | Heathrow | | --- | --- | | Destination airport | Sion | | Distance | 810 km | ## Book with confidence ### Compare flights from London to Sion easily and book with confidence For travelling on business or for pleasure, Expedia makes it easy to book your flights from London to Sion. Operating between them flights per day, airlines cover the route. And fly direct, getting you to Sion in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Heathrow to Sion.   To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights.  Grab a great deal on your flight from Heathrow (LHR) to Sion (SIR) The easiest way to view the best deals on flights from London to Sion today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Heathrow to Sion start at just and range up to .   To find an even better deal, try   - being flexible on your dates – midweek flights can be cheaper - looking for other airports near London and Sion - booking your flight during , the cheapest month on this route - varying your flight times – early morning and late at night are sometimes cheaper  Why you should book your London to Sion flight with Expedia! We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Heathrow to Sion for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.   Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. 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