Title: Cheap Flights from Wilmington to Seattle (ILM to SEA) - Expedia.co.uk ![](https://images.trvl-media.com/place/178307/82efb684-8d05-4b09-b7ea-52d5ab4ea1ac.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/178307/82efb684-8d05-4b09-b7ea-52d5ab4ea1ac.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap Flights from Wilmington (ILM) to Seattle (SEA) - [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 Wilmington Intl. Airport (ILM) to Seattle-Tacoma International Airport (SEA) - ![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:ilm,to:sea,departure:14/11/2025TANYT&leg2=from:sea,to:ilm,departure:21/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![Delta](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.co.uk/Flights-Search?leg1=from:ilm,to:sea,departure:14/11/2025TANYT&leg2=from:sea,to:ilm,departure:21/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![United](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United [](https://www.expedia.co.uk/Flights-Search?leg1=from:ilm,to:sea,departure:14/11/2025TANYT&leg2=from:sea,to:ilm,departure:21/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![Alaska Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AS.svg) Alaska Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:ilm,to:sea,departure:14/11/2025TANYT&leg2=from:sea,to:ilm,departure:21/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}]) - ![JetBlue Airways](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_B6.svg) JetBlue Airways [](https://www.expedia.co.uk/Flights-Search?leg1=from:ilm,to:sea,departure:14/11/2025TANYT&leg2=from:sea,to:ilm,departure:21/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"B6"}}]) ![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) ## Find the cheapest month to fly from Wilmington (ILM) to Seattle (SEA) ### March is typically the cheapest month to fly From £185 - £553 per traveller. ## Frequently asked questions ### How much is a flight from Wilmington Intl. Airport (ILM) to Sea-Tac Airport? > Start packing your bags, because round-trip flights between Wilmington Intl. Airport and Seattle - Tacoma Intl. Airport (SEA) start from . That's based on fares listed within the last 7 days on Expedia for flights departing within the next year. Prices can increase quickly, so book now to score 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 ILM to Sea-Tac Airport? > Every air carrier has a different set of terms and conditions. If you decide to cancel your trip, visit our [Customer Service Portal](https://www.expedia.co.uk/service/?langid=1033). ### How do I find cheap flights from Wilmington Intl. Airport to Sea-Tac Airport 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 Wilmington Intl. Airport (ILM) to SEA flights, you'll see a "no change fees" filter for you to select. ### How far is the flight from Wilmington Intl. Airport to Seattle - Tacoma Intl. Airport (SEA)? > Expect to be soaring through the sky for a while, as the flight distance from Wilmington to SeaTac is 4,000 kilometres. Set up a playlist of your favourite tunes before you leave home to keep yourself entertained during the trip. ### Which airlines fly direct from ILM to Seattle - Tacoma Intl. Airport (SEA)? > Flying directly between Wilmington Intl. Airport and Seattle - Tacoma Intl. Airport (SEA) isn't possible at present. However, you'll still be able to book a flight to SeaTac with at least one stop. ### Are ILM to Seattle - Tacoma Intl. Airport (SEA) flight tickets cheaper when they're purchased at the last minute? > Tickets from ILM to SEA are available up to 12 months before departure on Expedia. And although you may occasionally pick up a fantastic last-minute deal, it's not something you should count on. Also, booking your flights ahead of time means you'll have more options — and you can avoid ending up with the dreaded middle seat! We're always updating our fares to bring you the biggest bargains, so check back often for all the latest specials. ## Travel information | Origin airport | Wilmington Intl. | | --- | --- | | Destination airport | Seattle - Tacoma Intl. | | Distance | 3923 km | ## Book with confidence ### Compare flights from Wilmington to Seattle easily and book with confidence For travelling on business or for pleasure, Expedia makes it easy to book your flights from Wilmington to Seattle. Operating between them flights per day, airlines cover the route. And fly direct, getting you to Seattle - Tacoma Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Wilmington Intl. to Seattle - Tacoma Intl..   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 Wilmington Intl. (ILM) to Seattle - Tacoma Intl. (SEA) The easiest way to view the best deals on flights from Wilmington to Seattle 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 Wilmington Intl. to Seattle - Tacoma Intl. 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 Wilmington and Seattle - 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 Wilmington to Seattle flight with Expedia! We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Wilmington Intl. to Seattle - Tacoma Intl. 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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