Title: Cheap Flights to Koster Islands - Expedia.co.uk ![Summer at Koster island can be great!](https://images.trvl-media.com/place/6162102/3af68cc7-02c9-4df1-a0cb-244c49d5306b.jpg?impolicy=fcrop&w=1200&h=500&q=medium) Photo by Travel with all senses ![](https://a.travel-assets.com/travel-assets-manager/fallback-images-brand/bex_flights_v2.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap Flights to Koster Islands - [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 [Koster Islands Travel Guide](https://expedia.co.uk/Koster-Islands.dx6162102)[Hotels in Koster Islands](https://expedia.co.uk/Koster-Islands-Hotels.d6162102.Travel-Guide-Hotels)[Koster Islands Car Hire](https://expedia.co.uk/Compare-Cheap-Car-Hire-In-Koster-Islands.d6162102.Car-Hire-Guide)[Koster Islands Holidays](https://expedia.co.uk/Koster-Islands.d6162102.Holidays-City-Breaks) ## Popular airlines - ![FlexFlight](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_W2.svg) FlexFlight [](https://www.expedia.co.uk/Flights-Search?leg1=from:CMH,to:Koster Islands, Västra Götaland County, Sweden,departure:17/10/2025TANYT&leg2=from:Koster Islands, Västra Götaland County, Sweden,to:CMH,departure:24/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"W2"}}]) ![notification illustration](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\* ![deals illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 25% on select hotels after you book a flight\* ![trophy illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.co.uk/login) ## Frequently asked questions ### How do I find cheap flights to Koster Islands that have flexible change policies? > It's quick and easy with Expedia. Step 1: Type in your preferred travel dates and click on "Search." Step 2? Check the "No change fee" box under the "Flexible change policies" filter to the left of your screen. Step 3. Score your cheap and flexible airfare to Koster Islands. ### Which airlines fly to Koster Islands? > Choose from these two quality airlines that operate flights to or near Koster Islands: > > > > - SAS - 30 flights to or near Koster Islands each month, including 30 flights to Gardermoen Airport (OSL) per month. > - Norse Atlantic Airways - 30 flights to or near Koster Islands each month, including 30 flights to Gardermoen Airport (OSL) per month. ### How can I find cheap tickets to Koster Islands? > Book well in advance, fly to or from nearby airports, use miles or points — there are lots of ways! One more is to make the most of Expedia's "flexible dates" function. Search for your Koster Islands flight, then check out the prices for nearby dates. In the last seven days, the best price for a flight to Koster Islands was . ### How much is a flight to Koster Islands? > You could have picked up a return air ticket to Koster Islands from anywhere between and in the last seven days. For one-way journeys taking off from (), the lowest price during this period was . ### What are the most popular airports to fly into in Koster Islands? > Start organising your Koster Islands journey by reserving one of the 60 flights each month to Gardermoen Airport (OSL). This is the region's main point of entry. ### When is the cheapest time to fly to Koster Islands? > If you can be flexible with your travel dates to Koster Islands, try to depart early in the week. The cheapest day to take off is usually Tuesday, followed closely by Monday. Saturday is typically the costliest day, with lots of holiday makers choosing to fly on the weekend. ### How much is a plane ticket to Koster Islands? > In the last seven days, tickets cost between and . Have a look at our amazing deals to Koster Islands, pick your favourite and then get packing! ### What months are the cheapest to book a flight to Koster Islands? > February is the cheapest month to purchase a seat for your Koster Islands adventure. Tickets are at their most expensive during the month of December, so keep clear of this time if possible. ## Book with confidence ### Expedia flights to Koster Islands Searching for cheap flights to Koster Islands? No travel company presents more choices than Expedia if you're looking to compare flights to Koster Islands. With more airlines, cheaper flights, fewer stops, and more departure and arrival times travellers should ensure they search on Expedia before any holiday to Sydkoster. Expedia provides the cheapest flights to many destinations in Sydkoster and you may find even greater savings if you combine your flight with a hotel stay in Koster Islands. Expedia is the largest online travel agency which means that Expedia have access to cheap flights. So make sure you check Expedia regularly for these bargain flights because the cheapest airline tickets sell out fast. Expedia is not only free for everyone to use but it quick and easy to use. Find the lowest flight prices guaranteed and book directly through Expedia. Browse through hundreds of cheap flight offers to find the one that suits your budget by simply inputting your travel dates. Expedia will then find the cheapest flights to Koster Islands for that period and let you choose your preferred time and airline. If you need additional assistance, Expedia Customer Service representatives are available from 8am - 10pm Monday to Friday, and 9am - 10pm at weekends. Our capable staff will be able to help you with any questions regarding your Koster Islands flight, or other booking questions that may arise. When you book flights with Expedia you can rest assured that you have booked the best flight at the lowest price. ## Travel information | Destination airport | Koster Islands | | --- | --- | | Destination airport IATA code | THN | ## Explore a world of travel with Expedia - Accommodation - Flights - Packages - Cars - Holiday Homes - [1 Star Hotels in Hållö](https://www.expedia.co.uk/1Star-Hallo-Hotels.s10-0-d553248635964611784.Travel-Guide-Filter-Hotels) - [3 Star Hotels in Hållö](https://www.expedia.co.uk/3Star-Hallo-Hotels.s30-0-d553248635964611784.Travel-Guide-Filter-Hotels) - [4 Star Hotels in Bohuslän](https://www.expedia.co.uk/4Star-Bohuslan-Hotels.s40-0-d3000394167.Travel-Guide-Filter-Hotels) - [5 Star Hotels in Bohuslän](https://www.expedia.co.uk/5Star-Bohuslan-Hotels.s50-0-d3000394167.Travel-Guide-Filter-Hotels) - [5 Star Hotels in Hållö](https://www.expedia.co.uk/5Star-Hallo-Hotels.s50-0-d553248635964611784.Travel-Guide-Filter-Hotels) - [Bohus-Malmon Hotels](https://www.expedia.co.uk/Bohus-Malmon-Hotels.d6357890.Travel-Guide-Hotels) - 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