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Cheap flights from Seattle to Boston from $230

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Boston departing on 6/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
JetBlue Logo
11:41 pm - 10:25 am
SEA
-
ACK
7h 44m
1 stop
JetBlue Logo
12:02 pm - 9:05 pm
ACK
-
SEA
12h 03m
1 stop
$553JetBlue
Thu, Jul 9 - Mon, Jul 13
JetBlue Logo
11:41 pm - 10:25 am
SEA
-
ACK
7h 44m
1 stop
JetBlue Logo
12:02 pm - 9:05 pm
ACK
-
SEA
12h 03m
1 stop
$591JetBlue
Fri, Jul 10 - Mon, Jul 13
JetBlue Logo
10:20 pm - 11:12 am
SEA
-
ACK
9h 52m
1 stop
JetBlue Logo
3:43 pm - 10:46 pm
ACK
-
SEA
10h 03m
1 stop
$635JetBlue
Tue, Aug 4 - Wed, Aug 5
JetBlue Logo
11:41 pm - 10:25 am
SEA
-
ACK
7h 44m
1 stop
JetBlue Logo
12:02 pm - 9:05 pm
ACK
-
SEA
12h 03m
1 stop
$643JetBlue
Thu, Jun 11 - Sun, Jun 14
Delta Logo
11:53 pm - 1:27 pm
SEA
-
ACK
10h 34m
2 stops
Delta Logo
2:10 pm - 10:16 pm
ACK
-
SEA
11h 06m
1 stop
$662Delta
Thu, Jul 9 - Mon, Jul 13
Delta Logo
11:53 pm - 1:27 pm
SEA
-
ACK
10h 34m
2 stops
Delta Logo
2:10 pm - 12:01 am
ACK
-
SEA
12h 51m
2 stops
$667Delta
Thu, Jul 9 - Mon, Jul 13
JetBlue Logo
10:20 pm - 11:12 am
SEA
-
ACK
9h 52m
1 stop
JetBlue Logo
3:43 pm - 10:46 pm
ACK
-
SEA
10h 03m
1 stop
$696JetBlue
Tue, Aug 4 - Wed, Aug 5
American Airlines Logo
11:56 pm - 2:43 pm
SEA
-
ACK
11h 47m
2 stops
American Airlines Logo
12:56 pm - 9:19 pm
ACK
-
SEA
11h 23m
1 stop
$709American Airlines
Fri, Jul 10 - Mon, Jul 13
American Airlines Logo
11:56 pm - 2:43 pm
SEA
-
ACK
11h 47m
2 stops
American Airlines Logo
10:20 am - 8:37 pm
ACK
-
SEA
13h 17m
2 stops
$714American Airlines
Fri, Jul 10 - Mon, Jul 13
JetBlue Logo
11:41 pm - 10:25 am
SEA
-
ACK
7h 44m
1 stop
JetBlue Logo
12:02 pm - 9:05 pm
ACK
-
SEA
12h 03m
1 stop
$836JetBlue
Thu, Jul 2 - Sun, Jul 12

JetBlue flights from Seattle to Nantucket

Our best JetBlue deals on Seattle to Nantucket flight tickets
JetBlue
Jul 9
SEA11:41 pmSeattle/Tacoma Intl
7h 44m
1 stop
ACK10:25 amNantucket Memorial
Jul 13
ACK12:02 pmNantucket Memorial
12h 03m
1 stop
SEA9:05 pmSeattle/Tacoma Intl
$553
JetBlue
Jul 10
SEA11:41 pmSeattle/Tacoma Intl
7h 44m
1 stop
ACK10:25 amNantucket Memorial
Jul 13
ACK12:02 pmNantucket Memorial
12h 03m
1 stop
SEA9:05 pmSeattle/Tacoma Intl
$591
JetBlue
Aug 4
SEA10:20 pmSeattle/Tacoma Intl
9h 52m
1 stop
ACK11:12 amNantucket Memorial
Aug 5
ACK3:43 pmNantucket Memorial
10h 03m
1 stop
SEA10:46 pmSeattle/Tacoma Intl
$635

Delta flights from Seattle to Nantucket

Our best Delta deals on Seattle to Nantucket flight tickets
Delta
Jul 9
SEA11:53 pmSeattle/Tacoma Intl
10h 34m
2 stops
ACK1:27 pmNantucket Memorial
Jul 13
ACK2:10 pmNantucket Memorial
11h 06m
1 stop
SEA10:16 pmSeattle/Tacoma Intl
$662
Delta
Jul 9
SEA11:53 pmSeattle/Tacoma Intl
10h 34m
2 stops
ACK1:27 pmNantucket Memorial
Jul 13
ACK2:10 pmNantucket Memorial
12h 51m
2 stops
SEA12:01 amSeattle/Tacoma Intl
$667

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Nantucket 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, momondo users made 832,500 searches. Data last updated March 14, 2026.
Use the filters below to find and compare flights from Seattle to Nantucket that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Thu 7/9

11:41 pm-10:25 am

1 stop7h 44m

Nantucket Memorial

Mon 7/13

12:02 pm-9:05 pm

1 stop12h 03m

$553

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Fri 7/10

11:41 pm-10:25 am

1 stop7h 44m

Nantucket Memorial

Mon 7/13

12:02 pm-9:05 pm

1 stop12h 03m

$591

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Tue 8/4

10:20 pm-11:12 am

1 stop9h 52m

Nantucket Memorial

Wed 8/5

3:43 pm-10:46 pm

1 stop10h 03m

$635

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Thu 6/11

11:41 pm-10:25 am

1 stop7h 44m

Nantucket Memorial

Sun 6/14

12:02 pm-9:05 pm

1 stop12h 03m

$643

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Thu 7/9

11:53 pm-1:27 pm

2 stops10h 34m

Nantucket Memorial

Mon 7/13

2:10 pm-10:16 pm

1 stop11h 06m

$662

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Thu 7/9

11:53 pm-1:27 pm

2 stops10h 34m

Nantucket Memorial

Mon 7/13

2:10 pm-12:01 am

2 stops12h 51m

$667

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Tue 8/4

10:20 pm-11:12 am

1 stop9h 52m

Nantucket Memorial

Wed 8/5

3:43 pm-10:46 pm

1 stop10h 03m

$696

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Fri 7/10

11:56 pm-2:43 pm

2 stops11h 47m

Nantucket Memorial

Mon 7/13

12:56 pm-9:19 pm

1 stop11h 23m

$709

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Fri 7/10

11:56 pm-2:43 pm

2 stops11h 47m

Nantucket Memorial

Mon 7/13

10:20 am-8:37 pm

2 stops13h 17m

$714

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Thu 7/2

11:41 pm-10:25 am

1 stop7h 44m

Nantucket Memorial

Sun 7/12

12:02 pm-9:05 pm

1 stop12h 03m

$836

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Boston from

How to get the cheapest flight ticket from Seattle to Nantucket

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Can stopping save me money on Seattle to Nantucket flights?

You could potentially save up to 1% on your flight if you consider stops on a Seattle to Nantucket flight.

When to book flights from Seattle to Nantucket

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Nantucket according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Nantucket (SEA to ACK) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Nantucket

Fastest flight time

7h 44m

Direct flights

None
The fastest flight from Seattle to Nantucket takes 7h 44m
There are no direct flights from Seattle to Nantucket. There are no popular flight routes from Seattle to Nantucket.
Search flight deals

  • How far is Seattle/Tacoma Intl to Nantucket Memorial by plane?

    There are 2561.9 mi between Seattle/Tacoma Intl and Nantucket Memorial. Flights usually cover this in 7h 44m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Nantucket Memorial Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Nantucket Memorial Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Nantucket Memorial Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Nantucket Memorial Airport.

  • What documentation or ID do you need to fly to Nantucket Memorial Airport?

    The travel and health documents required for your trip to Nantucket Memorial Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Nantucket Memorial Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Nantucket?

It is quick and easy to find Seattle to Nantucket flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Nantucket that suits you.

Can I find flights from Seattle to Nantucket with flexible booking policies on momondo?

Flights from Seattle to Nantucket with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Seattle to Nantucket?

Once all potential Seattle to Nantucket flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Seattle to Nantucket right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Nantucket from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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