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://images.trvl-media.com/place/6162102/3af68cc7-02c9-4df1-a0cb-244c49d5306b.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:01/12/2025TANYT&leg2=from:Koster Islands, Västra Götaland County, Sweden,to:CMH,departure:08/12/2025TANYT&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) ## 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) - [B&B in Bohuslän](https://www.expedia.co.uk/Bohuslan-Bed-And-Breakfasts.d3000394167-aaBedAndBreakfasts.Travel-Guide-Accommodation) - [Caravan Parks in Bohuslän](https://www.expedia.co.uk/Bohuslan-Caravan-Parks.d3000394167-aaCaravanParks.Travel-Guide-Accommodation) - [Holiday Parks in Bohuslän](https://www.expedia.co.uk/Bohuslan-Holiday-Parks.d3000394167-aaHolidayParks.Travel-Guide-Accommodation) - [Hostels in Bohuslän](https://www.expedia.co.uk/Bohuslan-Hostels.d3000394167-aaHostels.Travel-Guide-Accommodation) - [Resorts in Bohuslän](https://www.expedia.co.uk/Bohuslan-Hotel-Resorts.d3000394167-aaHotelResorts.Travel-Guide-Accommodation) - [Family-Friendly Hotels in Bohuslän](https://www.expedia.co.uk/Bohuslan-Hotels-Family-Friendly-Hotel.0-0-d3000394167-tFamilyFriendlyHotel.Travel-Guide-Filter-Hotels) - [Golf Hotels in Bohuslän](https://www.expedia.co.uk/Bohuslan-Hotels-Golf-Hotels.0-0-d3000394167-tGolfHotels.Travel-Guide-Filter-Hotels) - [Hotels with Breakfast in Bohuslän](https://www.expedia.co.uk/Bohuslan-Hotels-Hotel-With-Breakfast.0-0-d3000394167-thotelwithbreakfast.Travel-Guide-Filter-Hotels) - [Luxury Hotels in Bohuslän](https://www.expedia.co.uk/Bohuslan-Hotels-Luxury-Hotel.0-0-d3000394167-tLuxuryHotel.Travel-Guide-Filter-Hotels) - [Shopping Hotels in Bohuslän](https://www.expedia.co.uk/Bohuslan-Hotels-Shopping-Hotel.0-0-d3000394167-tshoppinghotel.Travel-Guide-Filter-Hotels) - [Spa Hotels in Bohuslän](https://www.expedia.co.uk/Bohuslan-Hotels-Spa-Hotels.0-0-d3000394167-tSpaHotels.Travel-Guide-Filter-Hotels) - [Bohuslän Hotels](https://www.expedia.co.uk/Bohuslan-Hotels.d3000394167.Travel-Guide-Hotels) - [Houseboats in Bohuslän](https://www.expedia.co.uk/Bohuslan-Houseboats.d3000394167-aaHouseboats.Travel-Guide-Accommodation) - [Inns in Bohuslän](https://www.expedia.co.uk/Bohuslan-Inns.d3000394167-aaInns.Travel-Guide-Accommodation) - [Villas in Bohuslän](https://www.expedia.co.uk/Bohuslan-Villas.d3000394167-aaVillas.Travel-Guide-Accommodation) - [Bondemon Hotels](https://www.expedia.co.uk/Bondemon-Hotels.d3000015017.Travel-Guide-Hotels) - [Bovallstrand Hotels](https://www.expedia.co.uk/Bovallstrand-Hotels.d6343360.Travel-Guide-Hotels) - [Brastad Hotels](https://www.expedia.co.uk/Brastad-Hotels.d6305177.Travel-Guide-Hotels) - [Bullaren Hotels](https://www.expedia.co.uk/Bullaren-Hotels.d3000014981.Travel-Guide-Hotels) - [Dals-Ed S Hotels](https://www.expedia.co.uk/Dals-Ed-S-Hotels.d553248635976386334.Travel-Guide-Hotels) - [Munkedal Municipality Hotels](https://www.expedia.co.uk/Destinations-In-Munkedal-Municipality.d553248635975752283.Hotel-Destinations) - [Sotenäs Municipality Hotels](https://www.expedia.co.uk/Destinations-In-Sotenas-Municipality.d553248635975749835.Hotel-Destinations) - [Gay-Friendly Hotels in Strömstad Municipality](https://www.expedia.co.uk/Destinations-In-Stromstad-Municipality-Gay-Friendly-Hotel.0-0-d553248635975750385-tGayFriendlyHotel.Hotel-Filter-Destinations) - [Strömstad Municipality Hotels](https://www.expedia.co.uk/Destinations-In-Stromstad-Municipality.d553248635975750385.Hotel-Destinations) - [Caravan Parks in Dingle](https://www.expedia.co.uk/Dingle-Caravan-Parks.d6196042-aaCaravanParks.Travel-Guide-Accommodation) - [Dingle Hotels](https://www.expedia.co.uk/Dingle-Hotels.d6196042.Travel-Guide-Hotels) - [Ed Hotels](https://www.expedia.co.uk/Ed-Hotels.d6196037.Travel-Guide-Hotels) - [Fjallbacka Hotels](https://www.expedia.co.uk/Fjallbacka-Hotels.d6343355.Travel-Guide-Hotels) - [Gerlesborg Hotels](https://www.expedia.co.uk/Gerlesborg-Hotels.d3000014849.Travel-Guide-Hotels) - [Grebbestad Hotels](https://www.expedia.co.uk/Grebbestad-Hotels.d6123394.Travel-Guide-Hotels) - [Gurseröd Hotels](https://www.expedia.co.uk/Gurserod-Hotels.d3000014796.Travel-Guide-Hotels) - [Hällevadsholm Hotels](https://www.expedia.co.uk/Hallevadsholm-Hotels.d553248635922901492.Travel-Guide-Hotels) - [Hamburgsund Hotels](https://www.expedia.co.uk/Hamburgsund-Hotels.d6343359.Travel-Guide-Hotels) - [Havstenssund Hotels](https://www.expedia.co.uk/Havstenssund-Hotels.d6343354.Travel-Guide-Hotels) - [Hedekas Hotels](https://www.expedia.co.uk/Hedekas-Hotels.d3000014749.Travel-Guide-Hotels) - [Hovenäset Hotels](https://www.expedia.co.uk/Hovenaset-Hotels.d3000014707.Travel-Guide-Hotels) - [Hunnebostrand Hotels](https://www.expedia.co.uk/Hunnebostrand-Hotels.d6359347.Travel-Guide-Hotels) - [Kungshamn Hotels](https://www.expedia.co.uk/Kungshamn-Hotels.d6141355.Travel-Guide-Hotels) - [Lökholmen Hotels](https://www.expedia.co.uk/Lokholmen-Hotels.d3000014526.Travel-Guide-Hotels) - [Lur Hotels](https://www.expedia.co.uk/Lur-Hotels.d3000014510.Travel-Guide-Hotels) - [Munkedal Hotels](https://www.expedia.co.uk/Munkedal-Hotels.d6196047.Travel-Guide-Hotels) - [Rabbalshede Hotels](https://www.expedia.co.uk/Rabbalshede-Hotels.d6196041.Travel-Guide-Hotels) - [Reso Hotels](https://www.expedia.co.uk/Reso-Hotels.d6343356.Travel-Guide-Hotels) - [Smogen Hotels](https://www.expedia.co.uk/Smogen-Hotels.d6305835.Travel-Guide-Hotels) - [Stromstad Hotels](https://www.expedia.co.uk/Stromstad-Hotels.d6128592.Travel-Guide-Hotels) - [Strömstad Ö Hotels](https://www.expedia.co.uk/Stromstad-O-Hotels.d553248635976386182.Travel-Guide-Hotels) - [Svinesund Hotels](https://www.expedia.co.uk/Svinesund-Hotels.d553248635964996808.Travel-Guide-Hotels) - [Sydkoster Hotels](https://www.expedia.co.uk/Sydkoster-Hotels.d6271810.Travel-Guide-Hotels) - [Tanum Hotels](https://www.expedia.co.uk/Tanum-Hotels.d6127148.Travel-Guide-Hotels) - [Flights to Bengtsfors](https://www.expedia.co.uk/Cheap-Flights-To-Bengtsfors.d6351606.Travel-Guide-Flights) - [Flights to Dalsland](https://www.expedia.co.uk/Cheap-Flights-To-Dalsland.d6222864.Travel-Guide-Flights) - [Flights to Ed](https://www.expedia.co.uk/Cheap-Flights-To-Ed.d6196037.Travel-Guide-Flights) - [Flights to Fjallbacka](https://www.expedia.co.uk/Cheap-Flights-To-Fjallbacka.d6343355.Travel-Guide-Flights) - [Flights to Hållö](https://www.expedia.co.uk/Cheap-Flights-To-Hallo.d553248635964611784.Travel-Guide-Flights) - [Flights to Lysekil](https://www.expedia.co.uk/Cheap-Flights-To-Lysekil.d6141553.Travel-Guide-Flights) - [Flights to Smogen](https://www.expedia.co.uk/Cheap-Flights-To-Smogen.d6305835.Travel-Guide-Flights) - [Flights to Stromstad](https://www.expedia.co.uk/Cheap-Flights-To-Stromstad.d6128592.Travel-Guide-Flights) - [Flights to Uddevalla](https://www.expedia.co.uk/Cheap-Flights-To-Uddevalla.d602931.Travel-Guide-Flights) - [Blomsholms Stone Ship](https://www.expedia.co.uk/Blomsholms-Stone-Ship-Stromstad.d6162122.Attraction) - [Bohuslän Holidays](https://www.expedia.co.uk/Bohuslan.d3000394167.Holidays-City-Breaks) - [Visit Bohuslän](https://www.expedia.co.uk/Bohuslan.dx3000394167) - [Visit Bovallstrand](https://www.expedia.co.uk/Bovallstrand.dx6343360) - [Ed Holidays](https://www.expedia.co.uk/Ed.d6196037.Holidays-City-Breaks) - [Visit Ed](https://www.expedia.co.uk/Ed.dx6196037) - [Fjallbacka Holidays](https://www.expedia.co.uk/Fjallbacka.d6343355.Holidays-City-Breaks) - [Visit Fjallbacka](https://www.expedia.co.uk/Fjallbacka.dx6343355) - [Visit Grebbestad](https://www.expedia.co.uk/Grebbestad.dx6123394) - [Visit Hållö](https://www.expedia.co.uk/Hallo.dx553248635964611784) - [Hämmen Holidays](https://www.expedia.co.uk/Hammen.d3000014769.Holidays-City-Breaks) - [Visit Havstenssund](https://www.expedia.co.uk/Havstenssund.dx6343354) - [Visit Hunnebostrand](https://www.expedia.co.uk/Hunnebostrand.dx6359347) - [Visit Kåtebol](https://www.expedia.co.uk/Katebol.dx3000014642) - [Visit Kungshamn](https://www.expedia.co.uk/Kungshamn.dx6141355) - [Visit Lur](https://www.expedia.co.uk/Lur.dx3000014510) - [Visit Nordkoster](https://www.expedia.co.uk/Nordkoster.dx553248635975874561) - [Ramsvikslandet](https://www.expedia.co.uk/Ramsvikslandet-Hunnebostrand.d553248621532520550.Attraction) - [Smogen Holidays](https://www.expedia.co.uk/Smogen.d6305835.Holidays-City-Breaks) - [Visit Smogen](https://www.expedia.co.uk/Smogen.dx6305835) - [Stromstad Holidays](https://www.expedia.co.uk/Stromstad.d6128592.Holidays-City-Breaks) - [Visit Stromstad](https://www.expedia.co.uk/Stromstad.dx6128592) - [Visit Sydkoster](https://www.expedia.co.uk/Sydkoster.dx6271810) - [Visit Tanum](https://www.expedia.co.uk/Tanum.dx6127148) - [Car hire near Bohuslän](https://www.expedia.co.uk/Compare-Cheap-Car-Hire-In-Bohuslan.d3000394167.Car-Hire-Guide) - [Car hire Dingle](https://www.expedia.co.uk/Compare-Cheap-Car-Hire-In-Dingle.d6196042.Car-Hire-Guide) - [Car hire Ed](https://www.expedia.co.uk/Compare-Cheap-Car-Hire-In-Ed.d6196037.Car-Hire-Guide) - [Car hire Grebbestad](https://www.expedia.co.uk/Compare-Cheap-Car-Hire-In-Grebbestad.d6123394.Car-Hire-Guide) - [Car hire Kungshamn](https://www.expedia.co.uk/Compare-Cheap-Car-Hire-In-Kungshamn.d6141355.Car-Hire-Guide) - [Car hire Stromstad](https://www.expedia.co.uk/Compare-Cheap-Car-Hire-In-Stromstad.d6128592.Car-Hire-Guide) - [Car hire Tanum](https://www.expedia.co.uk/Compare-Cheap-Car-Hire-In-Tanum.d6127148.Car-Hire-Guide) - [Midsize Car Hire in Hållö](https://www.expedia.co.uk/Midsize-Car-Rentals-In-Hallo.d553248635964611784-tMidsize.Car-Rental-Guide-Class) - [Redspot Rental Cars in Hållö](https://www.expedia.co.uk/Redspot-Car-Rentals-In-Hallo.d553248635964611784-c1078.Car-Rental-Guide-Suppliers) - [Standard Car Hire in Hållö](https://www.expedia.co.uk/Standard-Car-Rentals-In-Hallo.d553248635964611784-tStandard.Car-Rental-Guide-Class) - [Bohuslän Holiday Rentals](https://www.expedia.co.uk/Bohuslan-Holiday-Rentals.d3000394167.Travel-Guide-HolidayRentals) - [Smogen Holiday Rentals](https://www.expedia.co.uk/Smogen-Holiday-Rentals.d6305835.Travel-Guide-HolidayRentals) \*Available to Expedia members.