$423+ Cheap flights from Washington to Nantucket Island
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ACK
Feb 10 — Feb 171
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Washington to Nantucket Island
Keep the following information in mind while searching for Washington to Nantucket Island flight deals. Data was last updated January 11, 2026.
Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $797 (Delta) |
Popular in | December |
Cheapest in | March |
Average price | $317 |
Find flight deals from Washington to Nantucket Island
Cheapest flights from Washington to Nantucket IslandExplore the most affordable flight options available from Washington to Nantucket Island. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 11, 2026.
Explore the most affordable flight options available from Washington to Nantucket Island. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 11, 2026.
This JetBlue deal was found by Cheapflights users on 1/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1811:40 pmPDX - ACK
1 stop10h 23mJetBlue
Wed 8/193:38 pmACK - PDX
1 stop9h 47mJetBlue
Deal found 1/8![JetBlue logo]()
$423
This Delta deal was found by Cheapflights users on 1/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/127:59 pmSEA - ACK
2 stops14h 28mDelta
Mon 6/152:10 pmACK - SEA
1 stop11h 06mDelta
Deal found 1/9![Delta logo]()
$797
This United Airlines deal was found by Cheapflights users on 1/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:59 pmPDX - ACK
2 stops11h 57mUnited Airlines
Wed 8/194:15 pmACK - PDX
2 stops31h 10mUnited Airlines
Deal found 1/8![United Airlines logo]()
$850
This United Airlines deal was found by Cheapflights users on 1/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/125:15 pmSEA - ACK
1 stop18h 14mUnited Airlines
Mon 6/154:15 pmACK - SEA
1 stop9h 05mUnited Airlines
Deal found 1/9![United Airlines logo]()
$881
Cheapflights Fare Finder
Customize your flight search to find flights from Washington to Nantucket Island that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 11, 2026.
Use the filters below to find and compare flights from Washington to Nantucket Island that are best for you.
Fly from
Washington
Fly to
Nantucket Island
Route
Depart
Return
Price
SeattleNantucket
SEA - ACK
SEAACK
Seattle/Tacoma Intl
Fri 6/12
7:59 pm-1:27 pm
2 stops14h 28m
Nantucket Memorial
Mon 6/15
2:10 pm-10:16 pm
1 stop11h 06m
$797
SeattleNantucket
SEA - ACK
SEAACK
Seattle/Tacoma Intl
Fri 6/12
5:15 pm-2:29 pm
1 stop18h 14m
Nantucket Memorial
Mon 6/15
4:15 pm-10:20 pm
1 stop9h 05m
$881
PortlandNantucket
PDX - ACK
PDXACK
Portland
Thu 6/11
10:55 pm-1:27 pm
2 stops11h 32m
Nantucket Memorial
Sun 6/14
2:10 pm-9:35 pm
1 stop10h 25m
$1,370
PortlandNantucket
PDX - ACK
PDXACK
Portland
Thu 6/11
10:56 pm-9:56 am
1 stop8h 00m
Nantucket Memorial
Sun 6/14
4:32 pm-10:08 pm
1 stop8h 36m
$1,960
Best time to book a flight from Washington to Nantucket Island
Have a flexible travel schedule? Discover the best time to fly to Nantucket Island from Washington with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Washington to Nantucket Island
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Related info for your journey
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Alternative routes for Washington to Nantucket Island
See prices for flight routes from nearby airports that may be better suited for you.
Top airline flying from Washington to Nantucket Island
Discover the top airline that operate flights from Washington to Nantucket Island. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$465 | Average$619 | FlexibilityNo cancel fee | On-time62% |