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$125+ 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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SEA
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$197
(JetBlue)

One-way from

$129
(JetBlue)

Popular in

August

Cheapest in

January

Average price

$416

Good round-trip deal

$294 or less

Good one-way deal

$179 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. 20% potential increase in price ($89 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Delta deal was found by Cheapflights users on 6/10. 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 9/246:35 pmBOS - SEA
Nonstop6h 38mDelta
Wed 10/110:00 pmSEA - BOS
Nonstop5h 34mDelta
Deal found 6/10$197
This JetBlue deal was found by Cheapflights users on 6/10. 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 9/137:00 amBOS - SEA
Nonstop6h 19mJetBlue
Wed 9/2411:30 amSEA - BOS
Nonstop5h 33mJetBlue
Deal found 6/10$207
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Wed 9/246:40 pmBOS - SEA
Nonstop6h 10mAlaska Airlines
Thu 9/253:59 pmSEA - BOS
Nonstop5h 24mAlaska Airlines
Deal found 6/10$217
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Wed 8/135:29 amBOS - SEA
1 stop11h 46mAmerican Airlines
Wed 8/206:34 amSEA - BOS
1 stop9h 07mAmerican Airlines
Deal found 6/11$220
This Hawaiian Airlines deal was found by Cheapflights users on 6/11. 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.
Tue 8/267:45 amBOS - SEA
1 stop12h 06mHawaiian Airlines
Tue 9/93:59 pmSEA - BOS
Nonstop5h 24mHawaiian Airlines
Deal found 6/11$232
This Southwest deal was found by Cheapflights users on 6/11. 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 7/3011:35 amBOS - SEA
1 stop14h 40mSouthwest
Tue 8/55:15 amSEA - BOS
1 stop12h 30mSouthwest
Deal found 6/11$293
This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/97:12 pmBOS - SEA
1 stop8h 44mUnited Airlines
Wed 7/237:00 pmSEA - BOS
1 stop8h 01mUnited Airlines
Deal found 6/11$306
This Mytrip deal was found by Cheapflights users on 6/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/84:44 pmBOS - SEA
2 stops26h 41mSpirit Airlines
Sun 7/135:30 pmSEA - BOS
2 stops23h 23mSpirit Airlines
Deal found 6/11$319
This CheapOair deal was found by Cheapflights users on 6/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/46:30 amBOS - SEA
1 stop19h 17mMultiple Airlines
Tue 7/155:30 pmSEA - BOS
2 stops12h 07mMultiple Airlines
Deal found 6/12$338
This Sun Country Air deal was found by Cheapflights users on 6/10. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/46:30 amBOS - SEA
1 stop19h 17mSun Country Air
Mon 7/146:03 pmSEA - BOS
1 stop12h 16mSun Country Air
Deal found 6/10$360
This Sun Country Air deal was found by Cheapflights users on 6/12. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/710:58 amBDL - SEA
1 stop24h 01mSun Country Air
Sun 7/1311:59 pmSEA - BDL
1 stop7h 04mSun Country Air
Deal found 6/12$405
This American Airlines deal was found by Cheapflights users on 6/11. 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 9/26:07 amALB - SEA
1 stop7h 57mAmerican Airlines
Sat 9/1310:09 amSEA - ALB
1 stop10h 34mAmerican Airlines
Deal found 6/11$406

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 June 12, 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 9/24

11:00 am-2:31 pm

Nonstop6h 31m

Seattle/Tacoma Intl

Tue 9/30

3:20 pm-11:44 pm

Nonstop5h 24m

$197

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Sat 9/13

7:00 am-10:19 am

Nonstop6h 19m

Seattle/Tacoma Intl

Wed 9/24

11:30 am-8:03 pm

Nonstop5h 33m

$207

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 8/13

5:29 am-2:15 pm

1 stop11h 46m

Seattle/Tacoma Intl

Wed 8/20

6:34 am-6:41 pm

1 stop9h 07m

$220

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Tue 8/26

7:20 am-10:33 am

Nonstop6h 13m

Seattle/Tacoma Intl

Wed 8/27

3:59 pm-12:23 am

Nonstop5h 24m

$222

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Tue 8/26

7:45 am-4:51 pm

1 stop12h 06m

Seattle/Tacoma Intl

Tue 9/9

3:59 pm-12:23 am

Nonstop5h 24m

$232

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 7/30

11:35 am-11:15 pm

1 stop14h 40m

Seattle/Tacoma Intl

Tue 8/5

5:15 am-8:45 pm

1 stop12h 30m

$293

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 7/9

7:12 pm-12:56 am

1 stop8h 44m

Seattle/Tacoma Intl

Wed 7/23

7:00 pm-6:01 am

1 stop8h 01m

$306

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Tue 7/8

4:44 pm-4:25 pm

2 stops26h 41m

Seattle/Tacoma Intl

Sun 7/13

5:30 pm-7:53 pm

2 stops23h 23m

$319

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Tue 7/15

10:14 am-7:59 am

1 stop24h 45m

Seattle/Tacoma Intl

Tue 7/22

5:30 pm-8:37 am

2 stops12h 07m

$343

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Fri 7/4

6:30 am-10:47 pm

1 stop19h 17m

Seattle/Tacoma Intl

Mon 7/14

6:03 pm-9:19 am

1 stop12h 16m

$360

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 54 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 July is currently the most expensive (average of $391). 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 June 12, 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 June 12, 2025.

The most flights from USMA to SEA are scheduled on a Wednesday (40 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, 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 December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated June 12, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Massachusetts to Seattle to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 53 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    $129 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on Southwest and American Airlines, with prices starting from $134 and $141, 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 (94%), Finnair (91%) and JetBlue (89%).

  • What are the cheapest flights from Massachusetts to Seattle?

    While on average a flight from Massachusetts to Seattle is generally $1,121, our data shows the cheapest flight currently is $118. When looking at the most popular route, (Boston Logan Intl - Seattle/Tacoma Intl), you can expect to pay $197 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 July is currently the most expensive (average of $391). 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 Massachusetts?

Book flights to Massachusetts if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Lynnwood
Olympia
Shoreline
Kent
Cle Elum
Centralia
Kirkland
Aberdeen
Renton
Shelton
Silverdale
Issaquah

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Alternative routes for Massachusetts to Seattle

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Top 9 airlines flying from Massachusetts to Seattle

Discover the top 9 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$143Average$359FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$153Average$377FlexibilityNo cancel feeOn-time85%
DeltaCheapest$170Average$377FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$177Average$388FlexibilityNo cancel feeOn-time83%
Spirit AirlinesCheapest$192Average$288FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$219Average$462FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$226Average$439FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$228Average$391FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$351Average$446FlexibilityNo cancel feeOn-time63%

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