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$109+ 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 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SEA
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
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 September 15, 2025.

Round-trip from

$167
(Priceline)

One-way from

$109
(JetBlue)

Popular in

August

Cheapest in

January

Average price

$337

Good round-trip deal

$282 or less

Good one-way deal

$181 or less
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. 14% potential increase in price ($56 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 15, 2025.

This Priceline deal was found by Cheapflights users on 9/12. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/267:00 amBOS - SEA
Nonstop6h 19mJetBlue
Fri 10/241:10 pmSEA - BOS
Nonstop5h 36mJetBlue
Deal found 9/12$167
This flygcity.se deal was found by Cheapflights users on 9/13. 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 flygcity.se is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/47:15 amBOS - SEA
Nonstop6h 19mJetBlue
Sat 10/111:10 pmSEA - BOS
Nonstop5h 36mJetBlue
Deal found 9/13$172
This Southwest deal was found by Cheapflights users on 9/12. 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 10/296:45 amBOS - SEA
1 stop11h 20mSouthwest
Fri 10/3112:35 pmSEA - BOS
1 stop7h 30mSouthwest
Deal found 9/12$185
This JetBlue deal was found by Cheapflights users on 9/13. 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 10/218:20 amBOS - SEA
Nonstop6h 39mJetBlue
Fri 10/241:10 pmSEA - BOS
Nonstop5h 36mJetBlue
Deal found 9/13$187
This KAYAK deal was found by Cheapflights users on 9/12. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/97:00 amBOS - SEA
Nonstop6h 35mAlaska Airlines
Sun 11/1611:10 pmSEA - BOS
Nonstop5h 19mAlaska Airlines
Deal found 9/12$191
This Southwest deal was found by Cheapflights users on 9/12. 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.
Tue 10/215:15 amBOS - SEA
1 stop14h 10mSouthwest
Tue 10/285:50 amSEA - BOS
2 stops9h 10mSouthwest
Deal found 9/12$194
This Hawaiian Airlines deal was found by Cheapflights users on 9/15. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:00 amBOS - SEA
Nonstop6h 35mHawaiian Airlines
Sat 11/153:59 pmSEA - BOS
Nonstop5h 21mHawaiian Airlines
Deal found 9/15$197
This Expedia deal was found by Cheapflights users on 9/13. 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.
Sat 9/277:00 amBOS - SEA
Nonstop6h 19mJetBlue
Tue 9/3011:30 amSEA - BOS
Nonstop5h 53mJetBlue
Deal found 9/13$199
This JetBlue deal was found by Cheapflights users on 9/13. 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.
Sat 10/118:20 amBOS - SEA
Nonstop6h 39mJetBlue
Sat 10/181:10 pmSEA - BOS
Nonstop5h 36mJetBlue
Deal found 9/13$202
This American Airlines deal was found by Cheapflights users on 9/13. 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.
Tue 10/281:45 pmBOS - SEA
1 stop10h 38mAmerican Airlines
Mon 11/312:41 amSEA - BOS
1 stop9h 58mAmerican Airlines
Deal found 9/13$206
This American Airlines deal was found by Cheapflights users on 9/12. 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.
Thu 10/235:56 pmALB - SEA
1 stop9h 31mAmerican Airlines
Mon 10/2712:34 amSEA - ALB
1 stop7h 42mAmerican Airlines
Deal found 9/12$234
This American Airlines deal was found by Cheapflights users on 9/12. 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.
Fri 10/245:56 pmALB - SEA
1 stop9h 31mAmerican Airlines
Tue 10/286:10 amSEA - ALB
1 stop8h 16mAmerican Airlines
Deal found 9/12$249

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 September 15, 2025.
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

Wed 11/12

7:00 am-10:35 am

Nonstop6h 35m

Seattle/Tacoma Intl

Sun 11/16

3:59 pm-12:20 am

Nonstop5h 21m

$197

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 11/12

7:00 am-10:35 am

Nonstop6h 35m

Seattle/Tacoma Intl

Sun 11/16

11:10 pm-7:29 am

Nonstop5h 19m

$197

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 11/12

7:00 am-10:35 am

Nonstop6h 35m

Seattle/Tacoma Intl

Sat 11/15

3:59 pm-12:20 am

Nonstop5h 21m

$197

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Mon 11/17

7:00 am-10:35 am

Nonstop6h 35m

Seattle/Tacoma Intl

Wed 11/19

3:59 pm-12:20 am

Nonstop5h 21m

$207

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Sat 11/15

9:00 am-12:35 pm

Nonstop6h 35m

Seattle/Tacoma Intl

Mon 11/17

3:59 pm-12:20 am

Nonstop5h 21m

$207

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Fri 11/7

7:20 am-10:45 am

Nonstop6h 25m

Seattle/Tacoma Intl

Tue 11/11

3:35 pm-11:51 pm

Nonstop5h 16m

$217

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Thu 11/6

7:20 am-10:45 am

Nonstop6h 25m

Seattle/Tacoma Intl

Tue 11/11

7:30 am-4:00 pm

Nonstop5h 30m

$217

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Thu 11/13

6:23 pm-9:51 pm

Nonstop6h 28m

Seattle/Tacoma Intl

Mon 11/17

8:07 pm-5:55 pm

1 stop18h 48m

$227

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Sat 12/6

7:00 am-10:35 am

Nonstop6h 35m

Seattle/Tacoma Intl

Tue 12/9

9:00 am-5:20 pm

Nonstop5h 20m

$237

HartfordSeattle

BDL - SEA

BDLSEA

Hartford Bradley Intl

Tue 9/30

6:00 am-12:04 pm

1 stop9h 04m

Seattle/Tacoma Intl

Tue 10/7

11:55 pm-10:30 am

1 stop7h 35m

$252

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/12

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, January is the cheapest month in which you can book a flight from Massachusetts to Seattle (average of $238). Flying from Massachusetts to Seattle in June is currently the most expensive (average of $387). 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 September 15, 2025.

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 September 15, 2025.

The most flights from USMA to SEA are scheduled on a Sunday (37 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (18 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 43 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 35m. Fly via Alaska Airlines, Hawaiian Airlines, or Delta 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?

    $119 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on United Airlines and Southwest, with prices starting from $119 and $142, 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 (93%), Delta (83%) and Virgin Atlantic (83%).

  • What are the cheapest flights from Massachusetts to Seattle?

    While on average a flight from Massachusetts to Seattle is generally $944, our data shows the cheapest flight currently is $104. When looking at the most popular route, (Boston Logan Intl - Seattle/Tacoma Intl), you can expect to pay $191 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, January is the cheapest month in which you can book a flight from Massachusetts to Seattle (average of $238). Flying from Massachusetts to Seattle in June is currently the most expensive (average of $387). 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
SeaTac
Tukwila
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Leavenworth
Renton
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Olympia
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Federal Way
Cle Elum
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Shoreline

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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$134Average$325FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$141Average$363FlexibilityNo cancel feeOn-time85%
DeltaCheapest$153Average$368FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$167Average$353FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$218Average$417FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$221Average$467FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$228Average$366FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$259Average$396FlexibilityNo cancel feeOn-time63%

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