$221 Cheap Flights from Seattle (SEA) to Nantucket (ACK)

View $221 flight on Sun, Aug 23, 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Nantucket, MA (ACK-Nantucket Memorial)

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 30% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Seattle to Nantucket (SEA-ACK)

Prices were available within the past 7 days and start at $221 for one-way flights and $371 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, Aug 29 - Sat, Sep 5
SEA
Seattle
ACK
Nantucket
$371 Roundtrip, found 16 hours ago
$371
Roundtrip
found 16 hours ago
Select American Airlines flight, departing Sat, Aug 29 from Seattle to Nantucket, returning Sat, Sep 5, priced at $371 found 16 hours ago
JetBlue Airways
Sat, Aug 22 - Wed, Aug 26
SEA
Seattle
ACK
Nantucket
$407 Roundtrip, found 6 days ago
$407
Roundtrip
found 6 days ago
Select JetBlue Airways flight, departing Sat, Aug 22 from Seattle to Nantucket, returning Wed, Aug 26, priced at $407 found 6 days ago
JetBlue Airways
Tue, Jul 14 - Tue, Jul 21
SEA
Seattle
ACK
Nantucket
$412 Roundtrip, found 1 day ago
$412
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Tue, Jul 14 from Seattle to Nantucket, returning Tue, Jul 21, priced at $412 found 1 day ago
American Airlines
Sat, Aug 29 - Sat, Sep 5
SEA
Seattle
ACK
Nantucket
$416 Roundtrip, found 16 hours ago
$416
Roundtrip
found 16 hours ago
Select American Airlines flight, departing Sat, Aug 29 from Seattle to Nantucket, returning Sat, Sep 5, priced at $416 found 16 hours ago
JetBlue Airways
Tue, Jul 14 - Tue, Jul 21
SEA
Seattle
ACK
Nantucket
$418 Roundtrip, found 1 day ago
$418
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Tue, Jul 14 from Seattle to Nantucket, returning Tue, Jul 21, priced at $418 found 1 day ago
JetBlue Airways
Tue, Jul 14 - Tue, Jul 21
SEA
Seattle
ACK
Nantucket
$447 Roundtrip, found 1 day ago
$447
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Tue, Jul 14 from Seattle to Nantucket, returning Tue, Jul 21, priced at $447 found 1 day ago
American Airlines
Sat, Aug 29 - Sat, Sep 5
SEA
Seattle
ACK
Nantucket
$471 Roundtrip, found 16 hours ago
$471
Roundtrip
found 16 hours ago
Select American Airlines flight, departing Sat, Aug 29 from Seattle to Nantucket, returning Sat, Sep 5, priced at $471 found 16 hours ago
American Airlines
Sat, Aug 29 - Sat, Sep 5
SEA
Seattle
ACK
Nantucket
$481 Roundtrip, found 16 hours ago
$481
Roundtrip
found 16 hours ago
Select American Airlines flight, departing Sat, Aug 29 from Seattle to Nantucket, returning Sat, Sep 5, priced at $481 found 16 hours ago
Delta
Sat, Aug 1 - Wed, Aug 12
SEA
Seattle
ACK
Nantucket
$491 Roundtrip, found 17 hours ago
$491
Roundtrip
found 17 hours ago
Select Delta flight, departing Sat, Aug 1 from Seattle to Nantucket, returning Wed, Aug 12, priced at $491 found 17 hours ago
United
Sat, Aug 29 - Sat, Sep 5
SEA
Seattle
ACK
Nantucket
$500 Roundtrip, found 16 hours ago
$500
Roundtrip
found 16 hours ago
Select United flight, departing Sat, Aug 29 from Seattle to Nantucket, returning Sat, Sep 5, priced at $500 found 16 hours ago

Alternative airports near Nantucket

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Martha's Vineyard MVY. Cheapest option available. Flights from $1,041
MVY
Martha's Vineyard
Cheapest
Flights from $1,041

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial) cost?
You can find cheap one-way flights from $221 and cheap return flights from $371 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial) with Expedia. Return flights often range between $1512 and $3302. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial)?
The cheapest month to fly from SEA to ACK is August when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial)?
Enter SEA to ACK and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial)?
American Airlines is one of the cheapest airlines offering connecting flights from Seattle, WA (SEA) to Nantucket, MA (ACK) with a layover in Sky Harbor Intl. (PHX), starting from around $1,460. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial)?
The earliest flight from Seattle - Tacoma International Airport (SEA) to Nantucket Memorial Airport (ACK) usually departs at around 12:05 AM, operated by American Airlines and 9K. This seasonal service is active in June, allowing you to start your trip early and enjoy more time on the beautiful island of Nantucket. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial)?
For flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial), the most popular departure times are in the evening, from 6pm to 9pm. About 29% of passengers prefer this time window. Many major carriers, including United Airlines and Alaska Airlines, offer flights during this window. This timing is favored as it allows you to travel after a day of activities in Seattle.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial)?
A flight from SEA to ACK with a layover takes around 8 hours, with the route covering approximately 2,567 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial)?
First class seats are offered on the SEA to ACK route. First class cabins are available on:

  • Delta Air Lines
  • American Airlines
  • United Airlines

How do I earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Nantucket from Seattle - Tacoma Intl. (SEA)?
If you're planning to travel to Nantucket from Seattle - Tacoma Intl. (SEA), you can fly into Nantucket Memorial (ACK) Some flights may connect through major hubs like O'Hare Intl. (ORD), Liberty Intl. (EWR), Denver Intl. (DEN) before reaching Nantucket. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial) Nantucket Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma Intl.) to Nantucket, MA (ACK-Nantucket Memorial) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Nantucket Memorial
Airlines serving
American Airlines, Delta, JetBlue Airways, United
Roundtrip price
$370
Distance
2566 mi

*Flight schedules are subject to change.

*Available to One Key members.