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Cheap flights from Massachusetts to Seattle from $139

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Massachusetts to Seattle departing on 3/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Massachusetts to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
12:10 pm - 7:03 pm
BOS
-
SEA
9h 53m
1 stop
United Airlines Logo
7:10 pm - 5:51 am
SEA
-
BOS
7h 41m
1 stop
$277United Airlines
Thu, Mar 12 - Wed, Mar 18
American Airlines Logo
5:54 pm - 12:24 am
BOS
-
SEA
9h 30m
1 stop
American Airlines Logo
7:15 am - 9:05 pm
SEA
-
BOS
10h 50m
1 stop
$279American Airlines
Sat, Feb 28 - Sat, Mar 7
United Airlines Logo
2:20 pm - 8:56 pm
BOS
-
SEA
9h 36m
1 stop
United Airlines Logo
11:59 pm - 10:49 am
SEA
-
BOS
7h 50m
1 stop
$282United Airlines
Thu, Feb 19 - Thu, Feb 26
Alaska Airlines Logo
7:00 am - 10:33 am
BOS
-
SEA
6h 33mnonstop
Alaska Airlines Logo
3:38 pm - 11:59 pm
SEA
-
BOS
5h 21mnonstop
$283Alaska Airlines
Fri, Mar 13 - Fri, Mar 20
United Airlines Logo
5:20 pm - 11:59 pm
BOS
-
SEA
9h 39m
1 stop
United Airlines Logo
7:05 pm - 6:04 am
SEA
-
BOS
7h 59m
1 stop
$286United Airlines
Sat, Apr 25 - Sun, May 3
JetBlue Logo
7:00 am - 10:20 am
BOS
-
SEA
6h 20mnonstop
JetBlue Logo
11:59 pm - 2:20 pm
SEA
-
BOS
11h 21m
1 stop
$287JetBlue
Tue, May 26 - Mon, Jun 1
Southwest Logo
2:00 pm - 11:55 pm
BOS
-
SEA
12h 55m
1 stop
Southwest Logo
11:45 pm - 12:15 pm
SEA
-
BOS
9h 30m
2 stops
$288Southwest
Wed, Apr 1 - Tue, Apr 7
Delta Logo
7:30 am - 6:23 pm
BOS
-
SEA
13h 53m
1 stop
Delta Logo
10:25 pm - 6:50 am
SEA
-
BOS
5h 25mnonstop
$295Delta
Wed, Mar 18 - Wed, Mar 25
Southwest Logo
3:20 pm - 11:55 pm
ALB
-
SEA
11h 35m
1 stop
Southwest Logo
6:35 am - 4:15 pm
SEA
-
ALB
6h 40m
1 stop
$376Southwest
Sat, Feb 28 - Mon, Mar 2
JetBlue Logo
11:25 am - 8:53 pm
MVY
-
SEA
12h 28m
1 stop
JetBlue Logo
10:10 pm - 10:41 am
SEA
-
MVY
9h 31m
1 stop
$867JetBlue
Wed, Jul 22 - Thu, Jul 30

JetBlue flights from Massachusetts to Seattle

Our best JetBlue deals on Massachusetts to Seattle flight tickets
JetBlue
May 26
BOS7:00 amBoston Logan Intl
6h 20m
SEA10:20 amSeattle/Tacoma Intl
Jun 1
SEA11:59 pmSeattle/Tacoma Intl
11h 21m
1 stop
BOS2:20 pmBoston Logan Intl
$287
JetBlue
May 19
BOS7:00 amBoston Logan Intl
6h 20m
SEA10:20 amSeattle/Tacoma Intl
May 26
SEA11:59 pmSeattle/Tacoma Intl
11h 21m
1 stop
BOS2:20 pmBoston Logan Intl
$316
JetBlue
Jun 1
BOS7:00 amBoston Logan Intl
6h 20m
SEA10:20 amSeattle/Tacoma Intl
Jun 1
SEA11:59 pmSeattle/Tacoma Intl
11h 21m
1 stop
BOS2:20 pmBoston Logan Intl
$321

Delta flights from Massachusetts to Seattle

Our best Delta deals on Massachusetts to Seattle flight tickets
Delta
Mar 18
BOS7:30 amBoston Logan Intl
13h 53m
1 stop
SEA6:23 pmSeattle/Tacoma Intl
Mar 25
SEA10:25 pmSeattle/Tacoma Intl
5h 25m
BOS6:50 amBoston Logan Intl
$295
Delta
Apr 10
BOS7:10 amBoston Logan Intl
6h 27m
SEA10:37 amSeattle/Tacoma Intl
Apr 15
SEA3:40 pmSeattle/Tacoma Intl
5h 19m
BOS11:59 pmBoston Logan Intl
$297
Delta
Feb 17
BOS7:15 amBoston Logan Intl
6h 30m
SEA10:45 amSeattle/Tacoma Intl
Feb 19
SEA9:55 pmSeattle/Tacoma Intl
14h 20m
1 stop
BOS3:15 pmBoston Logan Intl
$304

momondo 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, momondo users made 832,500 searches. Data last updated January 29, 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

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Thu 3/12

12:10 pm-7:03 pm

1 stop9h 53m

Seattle/Tacoma Intl

Wed 3/18

7:10 pm-5:51 am

1 stop7h 41m

$277

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Sat 2/28

5:54 pm-12:24 am

1 stop9h 30m

Seattle/Tacoma Intl

Sat 3/7

7:15 am-9:05 pm

1 stop10h 50m

$279

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Thu 2/19

2:20 pm-8:56 pm

1 stop9h 36m

Seattle/Tacoma Intl

Thu 2/26

11:59 pm-10:49 am

1 stop7h 50m

$282

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Fri 3/13

7:00 am-10:33 am

Nonstop6h 33m

Seattle/Tacoma Intl

Fri 3/20

3:38 pm-11:59 pm

Nonstop5h 21m

$283

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Sat 4/25

5:20 pm-11:59 pm

1 stop9h 39m

Seattle/Tacoma Intl

Sun 5/3

7:05 pm-6:04 am

1 stop7h 59m

$286

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Tue 5/26

7:00 am-10:20 am

Nonstop6h 20m

Seattle/Tacoma Intl

Mon 6/1

11:59 pm-2:20 pm

1 stop11h 21m

$287

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 4/1

2:00 pm-11:55 pm

1 stop12h 55m

Seattle/Tacoma Intl

Tue 4/7

11:45 pm-12:15 pm

2 stops9h 30m

$288

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 3/18

7:30 am-6:23 pm

1 stop13h 53m

Seattle/Tacoma Intl

Wed 3/25

10:25 pm-6:50 am

Nonstop5h 25m

$295

AlbanySeattle

ALB - SEA

ALBSEA

Albany Intl

Sat 2/28

3:20 pm-11:55 pm

1 stop11h 35m

Seattle/Tacoma Intl

Mon 3/2

6:35 am-4:15 pm

1 stop6h 40m

$376

West TisburySeattle

MVY - SEA

MVYSEA

West Tisbury Martha's Vineyard

Wed 7/22

11:25 am-8:53 pm

1 stop12h 28m

Seattle/Tacoma Intl

Thu 7/30

10:10 pm-10:41 am

1 stop9h 31m

$867

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Massachusetts to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Seattle?

In general, March is the cheapest month to fly from Massachusetts to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $283. If you don’t want to visit Seattle in March, then you should wait until September to fly from Massachusetts, when ticket prices are also cheap, with an average price of $317.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Massachusetts is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $406. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Massachusetts because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $506.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Massachusetts in the evening is the least expensive time of day to depart. momondo users have found prices as low as $325 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $464. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Massachusetts to Seattle/Tacoma Intl flight route?

Fly from Boston Logan Intl to Seattle/Tacoma Intl for the best Massachusetts - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from Massachusetts when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $368 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Massachusetts for as low as $312 on momondo.

What cabin class options are available on Massachusetts to Seattle/Tacoma Intl flights?

There are 4 cabin classes available to choose from on Massachusetts to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Massachusetts to Seattle flights?

No. A direct flight is the cheapest option for a flight between Massachusetts to Seattle.

Cheap Massachusetts to Seattle flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Massachusetts to Seattle

Best Price Found

$202

Fastest flight time

6h 18m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Massachusetts in the past 72 hours is $202. The best round-trip flight deal from Massachusetts to Seattle found on momondo in the last 72 hours is $343.
The fastest flight from Massachusetts to Seattle takes 6h 18m
Direct flights go from Massachusetts to Seattle every day.
There is 1 airport in Seattle. From Massachusetts there are direct flights to Seattle/Tacoma Intl (SEA).
Search flight deals

  • When did momondo last update prices for flights from Massachusetts to Seattle/Tacoma Intl Airport?

    Prices for flights from Massachusetts to Seattle/Tacoma Intl Airport are updated daily.

  • How many operators does momondo search for flights from Massachusetts to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Massachusetts to Seattle/Tacoma Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Massachusetts to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Massachusetts to Seattle?

Best airlines flying from Massachusetts to Seattle

Compare and see reviews for airlines that fly from Massachusetts to Seattle with momondo
Airline
Rating
Free Cancellation
Price
JetBluePriceFrom $121Free CancellationRating
7.2
2,891 reviews
Search JetBlue flights
Hawaiian AirlinesPriceFrom $125Free CancellationRating
7.8
2,830 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $145Free CancellationRating
7.9
8,127 reviews
Search Delta flights
Sun Country AirPriceFrom $165Free CancellationRating
6.9
343 reviews
Search Sun Country Air flights
United AirlinesPriceFrom $232Free CancellationRating
7.4
9,215 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $235Free CancellationRating
8.0
11,808 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $246Free CancellationRating
7.2
11,206 reviews
Search American Airlines flights
SouthwestPriceFrom $256Free CancellationRating
8.0
4,267 reviews
Search Southwest flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Lynnwood
Kent
Marysville
Puyallup
Redmond
Cle Elum
Tukwila
Lakewood
Federal Way
Centralia
Westport
Kirkland
Fife
Tumwater

Why use momondo?

Why should I use momondo to find a flight deal from Massachusetts to Seattle?

Finding the right flight to Seattle from Massachusetts is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Seattle quick and easy, saving you time and money.

Can I find flights from Massachusetts to Seattle with flexible booking policies on momondo?

All flight searches from Massachusetts to Seattle on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Massachusetts to Seattle?

Once you have performed a search for Massachusetts to Seattle flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Massachusetts to Seattle right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Massachusetts to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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