Title: Cheap Flights from Seattle to Nantucket (SEA to ACK) - Expedia.co.uk ![](https://images.trvl-media.com/place/285/e7fbaece-83d0-4f61-81f2-8a09a92b48d7.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](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 from Seattle (SEA) to Nantucket (ACK) - [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 Nantucket, MA (ACK-Nantucket Memorial) - ![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:sea,to:ack,departure:19/10/2025TANYT&leg2=from:ack,to:sea,departure:26/10/2025TANYT&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 Seattle (SEA) to Nantucket (ACK) ### September is typically the cheapest month to fly From £196 - £726 per traveller. ## Frequently asked questions ### How much is a flight from SEA to Nantucket Memorial Airport (ACK)? > Round-trip flights from Seattle - Tacoma Intl. Airport (SEA) to Nantucket Memorial Airport start from . This figure is based on fares available within the last 7 days on Expedia for flights departing within the next year — make your booking ASAP so you don't miss out. 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 Nantucket Memorial Airport? > Each air carrier has its own set of terms and conditions. If you do decide to cancel, follow the easy instructions on our [Customer Service Portal](https://www.expedia.co.uk/service/?langid=1033). ### How do I find cheap flights from SEA to Nantucket Memorial 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 Sea-Tac Airport to Nantucket Memorial Airport flights, you'll see a "no change fees" filter for you to select. ### How far is the flight from SEA to Nantucket Memorial Airport (ACK)? > With a flight distance of 4,100 kilometres between SeaTac and Nantucket, this is a long-haul flight. Remember to stay hydrated and take a short walk down the aisle from time to time. ### Which airlines fly direct from SEA to ACK? > If you want to fly straight from SEA to Nantucket Memorial Airport (ACK), you'll have to book a flight with at least one stop. Unfortunately, there are no airlines that fly directly on this route. ### Are Seattle - Tacoma Intl. Airport (SEA) to ACK flight tickets cheaper when they're purchased at the last minute? > Late planners can occasionally pick up a bargain, with some super cheap airfares from Sea-Tac Airport to Nantucket Memorial Airport emerging a few weeks prior to the departure date. If you'd rather plan ahead of time, Expedia compares and updates all the best flight deals continually — as early as a year in advance in some cases. It depends on the carrier though, as not all airlines publish prices that far in advance. ## Travel information | Origin airport | Seattle - Tacoma Intl. | | --- | --- | | Destination airport | Nantucket Memorial | | Distance | 4106 km | ## Book with confidence ### Compare flights from Seattle to Nantucket easily and book with confidence For travelling on business or for pleasure, Expedia makes it easy to book your flights from Seattle to Nantucket. Operating between them flights per day, airlines cover the route. And fly direct, getting you to Nantucket Memorial in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Seattle - Tacoma Intl. to Nantucket Memorial.   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 Nantucket Memorial (ACK) The easiest way to view the best deals on flights from Seattle to Nantucket 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 Nantucket Memorial 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 Nantucket - 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 Nantucket flight with Expedia! We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Seattle - Tacoma Intl. to Nantucket Memorial 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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