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$526+ Cheap flights from Cape Cod and the Islands to Seattle (SEA)

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 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
ACK — SEA
ene. 2 — ene. 91
vie. 1/2
vie. 1/9
1 adult, Economy
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Cheap flight deals from Cape Cod and the Islands to Seattle

Cheapest flights from Cape Cod and the Islands to Seattle
Explore the most affordable flight options available from Cape Cod and the Islands to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 3, 2025.

This Expedia deal was found by Cheapflights users on 12/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/1612:07 pmHYA - SEA
2 stops15h 05mMultiple Airlines
sáb. 12/2011:34 pmSEA - HYA
1 stop10h 36mMultiple Airlines
Deal found 12/1$1,099

Find flight deals from Cape Cod and the Islands to Seattle

Keep the following information in mind while searching for Cape Cod and the Islands to Seattle flight deals. Data was last updated diciembre 3, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$1,099
(Expedia)

One-way from

$526
(Expedia)

Popular in

December

Cheapest in

January

Average price

$446
Provider with most accurate pricing for Boston Logan Intl-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Boston Logan Intl-Seattle/Tacoma Intl flights.
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From Cape Cod and the Islands to Seattle/Tacoma Intl
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One-way flight from Cape Cod and the Islands to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($10 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Cape Cod and the Islands to Seattle 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 diciembre 3, 2025.
Use the filters below to find and compare flights from Cape Cod and the Islands to Seattle that are best for you.

Fly from

Cape Cod and the Islands

Fly to

Seattle

Route

Depart

Return

Price

HyannisSeattle

HYA - SEA

HYASEA

Hyannis Barnstable

mar. 12/16

12:07 pm-12:12 am

2 stops15h 05m

Seattle/Tacoma Intl

sáb. 12/20

11:34 pm-1:10 pm

1 stop10h 36m

$1,099

HyannisSeattle

HYA - SEA

HYASEA

Hyannis Barnstable

lun. 12/15

7:05 am-12:35 pm

1 stop8h 30m

$526

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

Best time to book a flight from Cape Cod and the Islands to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Cape Cod and the Islands 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 Cape Cod and the Islands to Seattle
No data available for this route at this time. Please check back soon.

Related info for your journey

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

  • What airport do you fly into for flights to Seattle from Cape Cod and the Islands?

    Seattle/Tacoma Intl (SEA) is the airport you will fly into if you book a flight from Cape Cod and the Islands to Seattle. It is only a 11.4 mi journey from Seattle/Tacoma Intl (SEA) to Seattle’s city center.

  • What are the most popular routes from Cape Cod and the Islands to Seattle?

    When deciding which route to take from Cape Cod and the Islands to Seattle consider Provincetown - Seattle/Tacoma Intl, Hyannis Barnstable - Seattle/Tacoma Intl or West Tisbury Martha's Vineyard - Seattle/Tacoma Intl as they are the most popular.

  • Can I find deals for flights from Cape Cod and the Islands to Seattle that include hotel bookings?

    Yes. In addition to deals on Cape Cod and the Islands to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Cape Cod and the Islands to Seattle?

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

  • Can I find deals for business class flights from Cape Cod and the Islands to Seattle?

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

See more FAQs

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