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$169+ 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 6/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SEA
Jun 23 — Jun 301
Tue 6/23
Tue 6/30
1 adult, Economy
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Cheap 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 May 24, 2026.

This United Airlines deal was found by Cheapflights users on 5/20. 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.
Tue 11/36:00 pm
BOS
-
SEA
1 stop9h 33m
United Airlines
Wed 11/411:00 am
SEA
-
BOS
1 stop7h 33m
United Airlines
Deal found 5/20$292
This Orbitz deal was found by Cheapflights users on 5/19. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/37:00 am
BOS
-
SEA
Nonstop6h 17m
Multiple Airlines
Tue 6/93:02 pm
SEA
-
BOS
1 stop11h 42m
Multiple Airlines
Deal found 5/19$294
This American Airlines deal was found by Cheapflights users on 5/22. 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 9/127:08 am
BOS
-
SEA
1 stop10h 16m
American Airlines
Sat 9/195:49 am
SEA
-
BOS
1 stop9h 41m
American Airlines
Deal found 5/22$297
This Cheapflightsfares deal was found by Cheapflights users on 5/23. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:24 pm
BOS
-
SEA
Nonstop6h 25m
JetBlue
Tue 9/1511:55 pm
SEA
-
BOS
Nonstop5h 24m
JetBlue
Deal found 5/23$302
This Delta deal was found by Cheapflights users on 5/20. 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 6/306:05 pm
BOS
-
SEA
Nonstop6h 24m
Delta
Wed 7/224:00 pm
SEA
-
BOS
Nonstop5h 17m
Delta
Deal found 5/20$307
This SmartFares deal was found by Cheapflights users on 5/21. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/87:00 am
BOS
-
SEA
Nonstop6h 15m
JetBlue
Wed 6/1711:45 am
SEA
-
BOS
Nonstop5h 28m
JetBlue
Deal found 5/21$310
This SmartFares deal was found by Cheapflights users on 5/24. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/77:00 am
BOS
-
SEA
Nonstop6h 15m
JetBlue
Tue 6/1611:45 am
SEA
-
BOS
Nonstop5h 28m
JetBlue
Deal found 5/24$311
This CheapOair deal was found by Cheapflights users on 5/23. 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.
Sat 9/55:42 pm
BOS
-
SEA
1 stop7h 57m
Alaska Airlines
Wed 9/167:40 am
SEA
-
BOS
Nonstop5h 44m
Alaska Airlines
Deal found 5/23$315
This Alaska Airlines deal was found by Cheapflights users on 5/23. 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.
Sat 9/197:59 pm
BOS
-
SEA
Nonstop6h 13m
Alaska Airlines
Wed 9/303:29 pm
SEA
-
BOS
Nonstop5h 25m
Alaska Airlines
Deal found 5/23$316
This American Airlines deal was found by Cheapflights users on 5/24. 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 9/105:45 pm
BOS
-
SEA
1 stop9h 26m
American Airlines
Mon 9/1410:45 pm
SEA
-
BOS
1 stop8h 39m
American Airlines
Deal found 5/24$317
This SmartFares deal was found by Cheapflights users on 5/23. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/147:44 pm
BOS
-
SEA
Nonstop6h 23m
Alaska Airlines
Tue 7/2111:18 pm
SEA
-
BOS
Nonstop5h 22m
Alaska Airlines
Deal found 5/23$319
This American Airlines deal was found by Cheapflights users on 5/22. 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 9/23:45 pm
ALB
-
SEA
1 stop8h 07m
American Airlines
Sat 9/1211:54 pm
SEA
-
ALB
1 stop8h 09m
American Airlines
Deal found 5/22$389

Find flight deals from Massachusetts to Seattle

Keep the following information in mind while searching for Massachusetts to Seattle flight deals. Data was last updated May 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$292
(United Airlines)

One-way from

$169
(American Airlines)

Popular in

December

Cheapest in

October

Average price

$377

Good round-trip deal

$384 or less

Good one-way deal

$208 or less
Provider with most accurate pricing for Boston Logan Intl-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Seattle/Tacoma Intl flights.
Search Deals
From Massachusetts to Seattle/Tacoma Intl
Search Deals
One-way flight from Massachusetts to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($36 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals
Price to beat on a round-trip flight from Massachusetts to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from Massachusetts to Seattle/Tacoma Intl.
Search Deals

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 May 24, 2026.
Use the filters below to find and compare flights from Massachusetts to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Tue 8/11

3:20 pm-11:05 pm

2 stops10h 45m

Seattle/Tacoma Intl

Tue 8/18

8:30 am-12:25 am

1 stop12h 55m

$348

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Tue 8/4

2:45 pm-11:25 pm

2 stops11h 40m

Seattle/Tacoma Intl

Mon 8/10

7:25 pm-9:55 am

2 stops11h 30m

$362

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Tue 7/28

11:35 am-8:10 pm

2 stops11h 35m

Seattle/Tacoma Intl

Tue 8/11

5:20 am-6:35 pm

2 stops10h 15m

$377

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Fri 11/6

4:20 pm-12:30 am

1 stop11h 10m

Seattle/Tacoma Intl

Mon 11/9

9:10 am-10:30 pm

2 stops10h 20m

$381

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Thu 8/13

8:40 am-9:45 pm

1 stop16h 05m

Seattle/Tacoma Intl

Mon 8/17

11:05 pm-9:55 am

1 stop7h 50m

$382

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Thu 8/6

8:40 am-9:45 pm

1 stop16h 05m

Seattle/Tacoma Intl

Thu 8/13

5:50 pm-6:00 am

1 stop9h 10m

$382

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 8/5

9:05 am-9:00 pm

1 stop14h 55m

Seattle/Tacoma Intl

Mon 8/10

7:25 pm-9:55 am

2 stops11h 30m

$383
Quickest round-trip

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Thu 7/23

7:44 pm-11:07 pm

Nonstop6h 23m

Seattle/Tacoma Intl

Wed 7/29

3:36 pm-11:59 pm

Nonstop5h 23m

$402

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 8/5

2:45 pm-11:05 pm

2 stops11h 20m

Seattle/Tacoma Intl

Mon 8/17

7:25 pm-9:55 am

2 stops11h 30m

$406

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Fri 7/3

4:45 pm-12:30 am

1 stop10h 45m

Seattle/Tacoma Intl

Tue 7/7

7:30 pm-8:00 am

2 stops9h 30m

$412

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/23

Showing 1-10 of 60 resultsSorted by cheapest first
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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 $108). Flying from Massachusetts to Seattle in December is currently the most expensive (average of $1,379). 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 May 24, 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 May 24, 2026.

The most flights from USMA to SEA are scheduled on a Sunday (27 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (18 on average).

How much does it cost to fly round-trip from Massachusetts to Seattle?

How far ahead should I book a flight from Massachusetts to Seattle?

Booking 48 days in advance of your planned departure date is, on average, the best time to get cheap flights from Massachusetts to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 42 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 9h 41m. Fly via Southwest, Delta, or Sun Country Air to get the fastest option. The distance between Massachusetts and Seattle is about 2423 mi. This flight may include one or multiple stops.

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

    $108 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on Hawaiian Airlines and Alaska Airlines, with prices starting from $118 and $120, 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 KLM (100%), Aer Lingus (100%) and JetBlue (100%).

  • What are the cheapest flights from Massachusetts to Seattle?

    While on average a flight from Massachusetts to Seattle is generally $904, our data shows the cheapest flight currently is $148. When looking at the most popular route, (Boston Logan Intl - Seattle/Tacoma Intl), you can expect to pay $292 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 $108). Flying from Massachusetts to Seattle in December is currently the most expensive (average of $1,379). 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
Tacoma
Ocean Shores
Olympia
Lacey
Edmonds
Leavenworth
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Lynnwood
Renton
Ellensburg
Fife
Lakewood
Issaquah
Marysville
Shoreline

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Alternative routes for Massachusetts to Seattle

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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 May 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$118Average$302FlexibilityNo cancel feeOn-time85%
JetBlueCheapest$138Average$364FlexibilityNo cancel feeOn-time62%
DeltaCheapest$153Average$403FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$172Average$325FlexibilityNo cancel feeOn-time83%
SouthwestCheapest$188Average$406FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$214Average$393FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$232Average$425FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$256Average$467FlexibilityNo cancel feeOn-time71%

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