What is the cheapest day to fly from Seattle to Nantucket?

Travelers seeking maximum savings on their Seattle to Nantucket flight should consider departing on Sunday evenings when fares are most often at their lowest. Tuesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Nantucket ranges from 1.6 - 4.3 inches per month. January is typically the wettest month, when rainfall can reach 4.3 in. June is typically the driest time to visit Nantucket when rainfall is around 1.6 in.

If weather is an important factor for your trip to Nantucket, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of February, when temperatures are typically at their lowest (around 32.0 F).

What is the cheapest day to fly round-trip from Seattle to Nantucket?

Travelers have found that booking a Saturday departure is the best way to save up to 65% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

How far in advance should I book a flight from Seattle to Nantucket?

To save on the cost of your flight from Seattle to Nantucket, book at least 53 days before your planned departure. Booking around this time can save you about 78% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $358 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $557.

What is the cheapest month to fly from Seattle to Nantucket?

January can be a great time to fly to Nantucket from Seattle with a flight ticket averaging about $349. Cheapflights users have found deals in the month of January for as cheap as $98. The most expensive prices can be found in the month of December.

What is the cheapest time of day to fly from SEA to ACK?

When flying from Seattle to Nantucket, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Can I find deals for flights from Seattle to Nantucket that include hotel bookings?

Yes. In addition to deals on Seattle to Nantucket flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Seattle to Nantucket?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Nantucket.

Can I find deals for business class flights from Seattle to Nantucket?

Yes. Cheapflights offers flight deals from Seattle to Nantucket by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$148+ Flights from Seattle to Nantucket

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Cheap flight deals from Seattle to Nantucket

Round-trip from	$610 (American Airlines)
Popular in	December
Cheapest in	January
Average price	$437

From Seattle/Tacoma Intl to Nantucket Memorial

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High demand for flights, 6% potential price rise

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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).

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Average for round-trip flights in August 2025

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Find flight deals from Seattle to Nantucket

Cheapest flights from Seattle to Nantucket
Explore the most affordable flight options available from Seattle to Nantucket. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

Mon 8/2511:15 pmSEA - ACK

2 stops13h 54mDelta

Fri 8/293:26 pmACK - SEA

1 stop10h 49mDelta

Deal found 8/11

$440

Sun 8/2412:58 amSEA - ACK

2 stops12h 48mAmerican Airlines

Fri 8/294:25 pmACK - SEA

1 stop9h 01mAmerican Airlines

Deal found 8/13

$610

Mon 8/2511:25 pmSEA - ACK

1 stop9h 28mJetBlue

Fri 8/293:08 pmACK - SEA

1 stop9h 57mJetBlue

Deal found 8/13

$711

Thu 8/2111:59 pmSEA - ACK

2 stops12h 56mAmerican Airlines

Sun 8/2411:13 amACK - SEA

2 stops11h 03mAmerican Airlines

Deal found 8/13

$1,061

Best flights from Seattle to Nantucket
Discover carefully curated flight deals from Seattle to Nantucket that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 14, 2025.

Mon 8/2511:15 pmSEA - ACK

2 stops13h 54mDelta

Fri 8/293:26 pmACK - SEA

1 stop10h 49mDelta

Deal found 8/11

$440

Sun 8/2412:58 amSEA - ACK

2 stops12h 48mAmerican Airlines

Fri 8/294:25 pmACK - SEA

1 stop9h 01mAmerican Airlines

Deal found 8/13

$610

Mon 8/2511:25 pmSEA - ACK

1 stop9h 28mJetBlue

Fri 8/293:08 pmACK - SEA

1 stop9h 57mJetBlue

Deal found 8/13

$711

Last-minute flights from Seattle to Nantucket
Discover last-minute flight deals from Seattle to Nantucket. Data last updated August 14, 2025 and is based on user searches.

Thu 8/2111:59 pmSEA - ACK

2 stops12h 56mAmerican Airlines

Sun 8/2411:13 amACK - SEA

2 stops11h 03mAmerican Airlines

Deal found 8/13

$1,061

Sun 8/2412:58 amSEA - ACK

2 stops12h 48mAmerican Airlines

Fri 8/294:25 pmACK - SEA

1 stop9h 01mAmerican Airlines

Deal found 8/13

$610

Mon 8/2511:55 pmSEA - ACK

2 stops13h 14mDelta

Fri 8/293:26 pmACK - SEA

1 stop10h 49mDelta

Deal found 8/12

$627

Mon 8/2511:25 pmSEA - ACK

1 stop9h 28mJetBlue

Fri 8/293:08 pmACK - SEA

1 stop9h 57mJetBlue

Deal found 8/13

$711

Thu 8/289:40 pmSEA - ACK

1 stop9h 20mJetBlue

Mon 9/112:53 pmACK - SEA

1 stop12h 06mJetBlue

Deal found 8/12

$1,384

Fly from

Fly to

Route

Depart

Return

Price

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Mon 8/25

11:15 pm-4:09 pm

2 stops13h 54m

Nantucket Memorial

Fri 8/29

3:26 pm-11:15 pm

1 stop10h 49m

$440

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Sun 8/24

12:58 am-4:46 pm

2 stops12h 48m

Nantucket Memorial

Fri 8/29

4:25 pm-10:26 pm

1 stop9h 01m

$610

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Mon 8/25

11:25 pm-11:53 am

1 stop9h 28m

Nantucket Memorial

Fri 8/29

3:08 pm-10:05 pm

1 stop9h 57m

$711

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Mon 9/15

11:59 pm-2:11 pm

1 stop11h 12m

$148

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Tue 9/16

11:10 pm-9:55 am

1 stop7h 45m

$170

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Mon 9/15

11:10 pm-9:55 am

1 stop7h 45m

$192

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Sun 9/14

11:59 pm-11:00 am

1 stop8h 01m

$284

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Sun 9/14

10:55 pm-2:50 pm

2 stops12h 55m

$329

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Sun 9/14

6:12 am-7:25 pm

3 stops34h 13m

$358

SeattleNantucket

SEA - ACK

SEAACK

Seattle/Tacoma Intl

Thu 8/21

11:59 pm-3:55 pm

2 stops12h 56m

$403

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 11 results

Best time to book a flight from Seattle to Nantucket

Have a flexible travel schedule? Discover the best time to fly to Nantucket from Seattle 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.

Related info for your journey

Can I find deals for flights from Seattle to Nantucket that include hotel bookings?
Yes. In addition to deals on Seattle to Nantucket flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Seattle to Nantucket?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Nantucket.
Can I find deals for business class flights from Seattle to Nantucket?
Yes. Cheapflights offers flight deals from Seattle to Nantucket by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Seattle to Nantucket

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$148+ Cheap flights from Seattle to Nantucket (SEA - ACK)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/15. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Seattle to Nantucket with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Seattle to Nantucket

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Find flight deals from Seattle to Nantucket

Cheapest flights from Seattle to NantucketExplore the most affordable flight options available from Seattle to Nantucket. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

Explore the most affordable flight options available from Seattle to Nantucket. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Seattle to Nantucket that are best for you.

Best time to book a flight from Seattle to Nantucket

Have a flexible travel schedule? Discover the best time to fly to Nantucket from Seattle with our price prediction graph.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Nantucket. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

Can I find deals for flights from Seattle to Nantucket that include hotel bookings?

How can I find direct flights from Seattle to Nantucket?

Can I find deals for business class flights from Seattle to Nantucket?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Seattle to Nantucket

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Cheapest flights from Seattle to Nantucket
Explore the most affordable flight options available from Seattle to Nantucket. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.