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$140+ Cheap flights from Massachusetts 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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SEA
Feb 15 — Feb 221
Sun 2/15
Sun 2/22
1 adult, Economy
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Cheap flight deals from Massachusetts to Seattle

Keep the following information in mind while searching for Massachusetts to Seattle flight deals. Data was last updated January 16, 2026.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$292
(Alaska Airlines)

One-way from

$140
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$337

Good round-trip deal

$384 or less

Good one-way deal

$188 or less
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 Massachusetts to Seattle/Tacoma Intl
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One-way flight from Massachusetts to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 12% potential increase in price ($52 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Price to beat on a round-trip flight from Massachusetts to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Massachusetts to Seattle/Tacoma Intl.
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Find flight deals from Massachusetts to Seattle

Cheapest flights from Massachusetts to Seattle
Explore the most affordable flight options available from Massachusetts to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 16, 2026.

This Alaska Airlines deal was found by Cheapflights users on 1/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/65:44 pm
BOS
-
SEA
1 stop18h 44m
Alaska Airlines
Tue 3/1010:40 pm
SEA
-
BOS
Nonstop5h 14m
Alaska Airlines
Deal found 1/15$292
This Delta deal was found by Cheapflights users on 1/15. 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 2/208:59 pm
BOS
-
SEA
1 stop16h 54m
Delta
Tue 2/247:30 am
SEA
-
BOS
Nonstop5h 29m
Delta
Deal found 1/15$295
This Southwest deal was found by Cheapflights users on 1/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/181:20 pm
BOS
-
SEA
2 stops12h 10m
Southwest
Tue 2/249:55 am
SEA
-
BOS
1 stop9h 35m
Southwest
Deal found 1/15$297
This Delta deal was found by Cheapflights users on 1/14. 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.
Wed 3/186:45 pm
BOS
-
SEA
Nonstop6h 25m
Delta
Fri 4/33:45 pm
SEA
-
BOS
Nonstop5h 14m
Delta
Deal found 1/14$298
This deal was found by Cheapflights users on 1/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/217:00 am
BOS
-
SEA
Nonstop6h 33m
Alaska Airlines
Fri 2/278:15 am
SEA
-
BOS
Nonstop5h 21m
Alaska Airlines
Deal found 1/15$299
This Delta deal was found by Cheapflights users on 1/15. 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.
Mon 2/168:59 pm
BOS
-
SEA
1 stop17h 06m
Delta
Tue 2/2410:20 pm
SEA
-
BOS
Nonstop5h 30m
Delta
Deal found 1/15$300
This Delta deal was found by Cheapflights users on 1/15. 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.
Tue 2/177:15 am
BOS
-
SEA
Nonstop6h 30m
Delta
Fri 2/273:55 pm
SEA
-
BOS
1 stop14h 14m
Delta
Deal found 1/15$301
This American Airlines deal was found by Cheapflights users on 1/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/712:11 pm
BOS
-
SEA
1 stop10h 07m
American Airlines
Thu 2/126:00 am
SEA
-
BOS
1 stop9h 02m
American Airlines
Deal found 1/14$302
This Southwest deal was found by Cheapflights users on 1/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/255:30 am
BOS
-
SEA
1 stop10h 45m
Southwest
Mon 3/26:35 am
SEA
-
BOS
2 stops13h 20m
Southwest
Deal found 1/15$303
This Delta deal was found by Cheapflights users on 1/15. 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.
Tue 2/177:15 am
BOS
-
SEA
Nonstop6h 30m
Delta
Thu 2/2611:17 am
SEA
-
BOS
1 stop15h 23m
Delta
Deal found 1/15$305
This Delta deal was found by Cheapflights users on 1/15. 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.
Thu 2/196:57 pm
BOS
-
SEA
Nonstop6h 28m
Delta
Wed 2/2511:17 am
SEA
-
BOS
1 stop15h 23m
Delta
Deal found 1/15$306
This Alaska Airlines deal was found by Cheapflights users on 1/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/207:00 am
BOS
-
SEA
Nonstop6h 33m
Alaska Airlines
Mon 2/2310:40 pm
SEA
-
BOS
Nonstop5h 14m
Alaska Airlines
Deal found 1/14$307

Cheapflights Fare Finder

 
Customize your flight search to find flights from Massachusetts 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 January 16, 2026.
Use the filters below to find and compare flights from Massachusetts to Seattle that are best for you.

Fly from

Massachusetts

Fly to

Seattle

Route

Depart

Return

Price

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Tue 3/24

5:40 pm-9:27 am

1 stop18h 47m

Seattle/Tacoma Intl

Tue 3/31

3:38 pm-11:59 pm

Nonstop5h 21m

$292

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 2/11

5:20 pm-8:44 pm

Nonstop6h 24m

Seattle/Tacoma Intl

Mon 2/23

3:55 pm-9:09 am

1 stop14h 14m

$301

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 2/25

5:30 am-1:15 pm

1 stop10h 45m

Seattle/Tacoma Intl

Mon 3/2

6:35 am-10:55 pm

2 stops13h 20m

$303

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Fri 2/20

6:57 pm-10:25 pm

Nonstop6h 28m

Seattle/Tacoma Intl

Thu 2/26

7:30 am-3:59 pm

Nonstop5h 29m

$307

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Fri 2/6

6:44 pm-10:17 pm

Nonstop6h 33m

Seattle/Tacoma Intl

Sun 2/8

7:55 am-4:20 pm

Nonstop5h 25m

$307

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Tue 2/3

5:20 pm-10:33 pm

1 stop8h 13m

Seattle/Tacoma Intl

Thu 2/12

3:42 pm-11:59 pm

Nonstop5h 17m

$307

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Thu 2/12

10:03 am-8:00 pm

1 stop12h 57m

Seattle/Tacoma Intl

Tue 2/17

10:20 pm-6:50 am

Nonstop5h 30m

$309

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Tue 2/17

7:15 am-10:45 am

Nonstop6h 30m

Seattle/Tacoma Intl

Tue 2/24

6:00 am-9:18 pm

2 stops12h 18m

$315

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Thu 5/7

3:30 pm-7:00 pm

Nonstop6h 30m

Seattle/Tacoma Intl

Fri 5/8

9:25 pm-6:03 am

1 stop29h 38m

$316

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 3/18

7:15 am-10:40 am

Nonstop6h 25m

Seattle/Tacoma Intl

Fri 4/3

9:31 am-5:53 am

1 stop17h 22m

$317

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/14

Showing 1-10 of 60 results
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Best time to book a flight from Massachusetts to Seattle

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

What is the cheapest month to book a flight from Massachusetts to Seattle?

Currently, March is the cheapest month in which you can book a flight from Massachusetts to Seattle (average of $115). Flying from Massachusetts to Seattle in December is currently the most expensive (average of $228). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Find hourly flight availability from Massachusetts to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 16, 2026.

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

Weekly flight availability from Massachusetts to Seattle

Explore weekly flight availability from Massachusetts to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated January 16, 2026.

The most flights from USMA to SEA are scheduled on a Thursday (20 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 on average).

Related info for your journey

Find useful and relevant information for your journey from Massachusetts 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 Massachusetts?

    Located just 11.4 mi from the city center, Seattle/Tacoma Intl (SEA) is the airport most travelers will use when flying to Seattle from Massachusetts.

  • How popular is this Massachusetts to Seattle flight route?

    This flight path from Massachusetts to Seattle/Tacoma Intl was viewed by 48 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Massachusetts to Seattle?

    There are many flights that can get you from Massachusetts to Seattle in 6h 24m. Fly via Alaska Airlines, Delta, or Southwest to get the fastest option. The distance between Massachusetts and Seattle is about 2487 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Massachusetts to Seattle one-way?

    $103 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on JetBlue and Alaska Airlines, with prices starting from $106 and $111, respectively.

  • What are the most popular routes from Massachusetts to Seattle?

    The most popular route from Massachusetts to Seattle is Boston Logan Intl - Seattle/Tacoma Intl. You may also consider Hartford Bradley Intl - Seattle/Tacoma Intl or Albany Intl - Seattle/Tacoma Intl.

  • What are the most reliable airlines from Massachusetts to Seattle?

    The top 3 most reliable airlines when flying from Massachusetts to Seattle are LATAM Airlines (70%), EL AL (66%) and Alaska Airlines (63%).

  • What are the cheapest flights from Massachusetts to Seattle?

    While on average a flight from Massachusetts to Seattle is generally $1,092, our data shows the cheapest flight currently is $128. When looking at the most popular route, (Boston Logan Intl - Seattle/Tacoma Intl), you can expect to pay $228 for that flight.

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

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

  • How can I find direct flights from Massachusetts to Seattle?

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

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

    Yes. Cheapflights offers flight deals from Massachusetts 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.

  • What is the cheapest month to book a flight from Massachusetts to Seattle?

    Currently, March is the cheapest month in which you can book a flight from Massachusetts to Seattle (average of $115). Flying from Massachusetts to Seattle in December is currently the most expensive (average of $228). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Lynnwood
Lacey
Edmonds
Renton
Puyallup
Kirkland
Kent
Tukwila
Marysville
Fife
Aberdeen
Shoreline
Centralia
Federal Way
Chehalis

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Top 8 airlines flying from Massachusetts to Seattle

Discover the top 8 airlines that operate flights from Massachusetts to Seattle. 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 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$119Average$321FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$125Average$314FlexibilityNo cancel feeOn-time85%
DeltaCheapest$139Average$357FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$165Average$275FlexibilityNo cancel feeOn-time83%
United AirlinesCheapest$214Average$383FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$231Average$419FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$246Average$456FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$256Average$382FlexibilityNo cancel feeOn-time63%

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