Title: $401 Cheap KLM flights Sofia (SOF) to Billund (BLL) - Expedia.com ![](https://images.trvl-media.com/place/6098946/6c4c4107-6687-485c-8021-b57b3e96603d.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/6098946/6c4c4107-6687-485c-8021-b57b3e96603d.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # $401 Cheap KLM flights Sofia (SOF) to Billund (BLL) [View $401 flight on Fri, May 22, 2026](https://expedia.com/Flights-Search?trip=oneway&leg1=from:SOF,to:BLL,departure:5/22/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:400.90&airProductToken=AQpzCj0Iy5gBEgQzMDc2GNIrIICTASjw0I0DMKTSjQM4VEAAWAFqBUxJR0hUcghUWVMwQkFMQXoJCMaEARIDNDYxCjIIy5gBEgQxMjk1GICTASDhWijs040DMLLUjQM4VEABWAFqBUxJR0hUcghUWVMwQkFMQRIKCAEQARgBKgJLTBgBIgQIARABKAIoAygEMAE) - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 30% on select hotels after you book a flight\* - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our OneKeyCash [Learn about One Key](https://www.expedia.com/welcome-one-key) ## $401 Cheap KLM flights Sofia (SOF) to Billund (BLL) Prices were available within the past 7 days and start at $401 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ## Frequently asked questions ### How much is a KLM flight from Sofia Airport (SOF) to Billund Airport (BLL)? ### What is the cheapest month to fly from SOF to BLL with KLM? ### What is the cheapest time to book flights from Sofia Airport (SOF) to Billund Airport (BLL) with KLM? ### Does KLM fly nonstop from Sofia Airport (SOF) to Billund Airport (BLL)? ### What is the earliest KLM flight from SOF to BLL? ### What airports does KLM fly into in Billund? ### Why fly with KLM from SOF to BLL? ### Can I change or cancel my KLM flight from Sofia Airport (SOF) to Billund Airport (BLL)? ## Travel information | Origin airport | Sofia | | ------------------- | ----------------------------------------------------------------- | | Destination airport | Billund | | Airlines serving | British Airways, LOT-Polish Airlines, Lufthansa, Turkish Airlines | | Popular airline | Turkish Airlines | | Distance | 1103 mi | \*Flight schedules are subject to change. \*Available to One Key members. ## Explore a world of travel with Expedia - 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