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-Tacoma International Airport (SEA) 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:30/09/2025TANYT&leg2=from:dut,to:sea,departure:07/10/2025TANYT&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:sea,to:dut,departure:30/09/2025TANYT&leg2=from:dut,to:sea,departure:07/10/2025TANYT&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:sea,to:dut,departure:30/09/2025TANYT&leg2=from:dut,to:sea,departure:07/10/2025TANYT&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:sea,to:dut,departure:30/09/2025TANYT&leg2=from:dut,to:sea,departure:07/10/2025TANYT&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:sea,to:dut,departure:30/09/2025TANYT&leg2=from:dut,to:sea,departure:07/10/2025TANYT&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:sea,to:dut,departure:30/09/2025TANYT&leg2=from:dut,to:sea,departure:07/10/2025TANYT&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:sea,to:dut,departure:30/09/2025TANYT&leg2=from:dut,to:sea,departure:07/10/2025TANYT&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) Flight from Seattle to Unalaska route information | Origin airport | Seattle - Tacoma Intl. | | --- | --- | | Destination airport | Unalaska | | Distance | 3125 km | ## 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. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.   ## Frequently asked questions ### How much is a flight from Seattle - Tacoma Intl. Airport (SEA) to Dutch Harbour Airport? > Start packing your suitcase, because round-trip flights from SEA to DUT start from . That's based on airfares available within the last 7 days on Expedia for flights departing within the next year. Prices can rise quickly, so book today to secure 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 Sea-Tac Airport to Unalaska Airport (DUT)? > This can differ from airline to airline, as each has its own set of terms and conditions. Head to the [Customer Service Portal](https://www.expedia.co.uk/service/?langid=1033), where you'll find instructions on how to cancel your flight online. ### How do I find cheap flights from Sea-Tac Airport to Unalaska Airport (DUT) 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 Seattle - Tacoma Intl. Airport (SEA) to Unalaska Airport (DUT) flights, you'll see a "no change fees" filter for you to select. ### How far is the flight from Sea-Tac Airport to Unalaska Airport? > You'll be cruising at altitude for a while, as the flight distance between SEA and DUT is 3,100 kilometres. Put together a playlist of your favourite podcasts before leaving home to keep yourself entertained during your flight. ### Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to Unalaska Airport? > Right now, no airlines offer direct flights from Sea-Tac Airport to Unalaska Airport (DUT). You'll need to book a flight with one or more stops. To get the best price and connections, lock in your airfare well ahead of time. ### Are Seattle - Tacoma Intl. Airport (SEA) to Dutch Harbour Airport flight tickets cheaper when they're purchased at the last minute? > Last-minute bookings from Sea-Tac Airport to Unalaska Airport can be hit-or-miss. You may be able to score a great bargain, but you could also miss out entirely! If you'd prefer to start planning early on, Expedia compares flight deals up to a year in advance. Just keep in mind that not all airlines issue their prices so far in advance. Our suggestion? 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