Title: Cheap Flights from Seattle to Unalaska (SEA to DUT) - Expedia.co.uk ![Lupine on Unalaska Island. Unalaska is the largest city of the Aleutian Islands. It's located on Unalaska Island and neighboring Amaknak Island in the Aleutian Islands off mainland Alaska. The Unangan people were the first to inhabit the island of Unalaska and named it "Ounalashka", meaning "near the peninsula". #BVStrove](https://images.trvl-media.com/place/6084779/6e3de8e4-9eb3-4144-a0fb-2b87a372a0d2.jpg?impolicy=fcrop&w=1200&h=500&q=medium) Photo by Carmen Bianco ![](https://images.trvl-media.com/place/6084779/6e3de8e4-9eb3-4144-a0fb-2b87a372a0d2.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap Flights from Seattle (SEA) to Unalaska (DUT) - [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 Seattle to Unalaska, AK (DUT) - ![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:SEA,to:DUT,departure:02/01/2026TANYT&leg2=from:DUT,to:SEA,departure:09/01/2026TANYT&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:SEA,to:DUT,departure:02/01/2026TANYT&leg2=from:DUT,to:SEA,departure:09/01/2026TANYT&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:SEA,to:DUT,departure:02/01/2026TANYT&leg2=from:DUT,to:SEA,departure:09/01/2026TANYT&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:SEA,to:DUT,departure:02/01/2026TANYT&leg2=from:DUT,to:SEA,departure:09/01/2026TANYT&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:SEA,to:DUT,departure:02/01/2026TANYT&leg2=from:DUT,to:SEA,departure:09/01/2026TANYT&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:SEA,to:DUT,departure:02/01/2026TANYT&leg2=from:DUT,to:SEA,departure:09/01/2026TANYT&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:SEA,to:DUT,departure:02/01/2026TANYT&leg2=from:DUT,to:SEA,departure:09/01/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LX"}}]) - ![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 much is a flight from Seattle - Tacoma Intl. Airport (SEA) to Dutch Harbour Airport? ### Do I need to pay a cancellation fee if I cancel my flight from Sea-Tac Airport to Unalaska Airport (DUT)? ### How do I find cheap flights from Sea-Tac Airport to Unalaska Airport (DUT) that have flexible change policies? ### How far is the flight from Sea-Tac Airport to Unalaska Airport? ### Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to Unalaska Airport? ### Are Seattle - Tacoma Intl. Airport (SEA) to Dutch Harbour Airport flight tickets cheaper when they're purchased at the last minute? ## Travel information | Origin airport | Seattle - Tacoma Intl. | | ------------------- | ---------------------- | | Destination airport | Unalaska | | Distance | 3125 km | ## Book with confidence # Compare flights from Seattle to Unalaska easily and book with confidence For travelling on business or for pleasure, Expedia makes it easy to book your flights from Seattle to Unalaska. Operating between them flights per day, airlines cover the route. And fly direct, getting you to Unalaska in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Seattle - Tacoma Intl. to Unalaska. 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 Seattle - Tacoma Intl. (SEA) to Unalaska (DUT) The easiest way to view the best deals on flights from Seattle to Unalaska 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 Seattle - Tacoma Intl. to Unalaska 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 Seattle and Unalaska - 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 Seattle to Unalaska flight with Expedia! We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Seattle - Tacoma Intl. to Unalaska 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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