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Cheap flights from Seattle to Boston from $154

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Boston departing on 12/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
5:15 am - 8:30 pmSEA-BOS
12h 15m2 stops
Southwest Logo
8:50 am - 8:10 pmBOS-SEA
14h 20m2 stops
$254Southwest
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Sat, Jan 24 - Sat, Jan 31
Southwest Logo
5:15 am - 4:30 pmSEA-BOS
8h 15m1 stop
Southwest Logo
4:50 pm - 10:30 pmBOS-SEA
8h 40m1 stop
$258Southwest
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Fri, Jan 16 - Tue, Jan 20
JetBlue Logo
11:30 am - 8:05 pmSEA-BOS
5h 35mnonstop
JetBlue Logo
7:00 am - 10:20 amBOS-SEA
6h 20mnonstop
$262JetBlue
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Tue, May 12 - Sat, May 23
Southwest Logo
7:25 am - 10:55 pmSEA-BOS
12h 30m1 stop
Southwest Logo
5:30 am - 1:15 pmBOS-SEA
10h 45m1 stop
$263Southwest
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Fri, Feb 13 - Wed, Feb 18
Southwest Logo
8:45 am - 10:30 pmSEA-BOS
10h 45m2 stops
Southwest Logo
1:20 pm - 10:35 pmBOS-SEA
12h 15m2 stops
$266Southwest
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Wed, Jan 21 - Thu, Jan 29
Alaska Airlines Logo
3:40 pm - 11:54 pmSEA-BOS
5h 14mnonstop
Alaska Airlines Logo
6:44 pm - 10:17 pmBOS-SEA
6h 33mnonstop
$267Alaska Airlines
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Wed, Jan 21 - Thu, Jan 29
Southwest Logo
10:20 am - 10:55 pmSEA-BOS
9h 35m1 stop
Southwest Logo
5:20 am - 10:50 amBOS-SEA
8h 30m1 stop
$268Southwest
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Sat, Jan 10 - Sun, Jan 11
Southwest Logo
6:05 am - 8:50 pmSEA-BOS
11h 45m2 stops
Southwest Logo
1:20 pm - 10:35 pmBOS-SEA
12h 15m2 stops
$269Southwest
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Fri, Jan 9 - Wed, Jan 14
American Airlines Logo
11:20 am - 11:51 pmSEA-BOS
9h 31m1 stop
American Airlines Logo
12:55 pm - 10:20 pmBOS-SEA
12h 25m1 stop
$270American Airlines
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Mon, Jan 5 - Mon, Jan 12
Delta Logo
7:20 am - 11:41 pmSEA-BOS
13h 21m1 stop
Delta Logo
6:45 pm - 10:13 pmBOS-SEA
6h 28mnonstop
$271Delta
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Wed, Jan 14 - Sat, Jan 17

Southwest flights from Seattle to Boston

Our best Southwest deals on Seattle to Boston flight tickets
Southwest
Jan 24
SEA5:15 amSeattle/Tacoma Intl
12h 15m
2 stops
BOS8:30 pmBoston Logan Intl
Jan 31
BOS8:50 amBoston Logan Intl
14h 20m
2 stops
SEA8:10 pmSeattle/Tacoma Intl
$254
Find similar
Southwest
Jan 16
SEA5:15 amSeattle/Tacoma Intl
8h 15m
1 stop
BOS4:30 pmBoston Logan Intl
Jan 20
BOS4:50 pmBoston Logan Intl
8h 40m
1 stop
SEA10:30 pmSeattle/Tacoma Intl
$258
Find similar
Southwest
Feb 13
SEA7:25 amSeattle/Tacoma Intl
12h 30m
1 stop
BOS10:55 pmBoston Logan Intl
Feb 18
BOS5:30 amBoston Logan Intl
10h 45m
1 stop
SEA1:15 pmSeattle/Tacoma Intl
$263
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JetBlue flights from Seattle to Boston

Our best JetBlue deals on Seattle to Boston flight tickets
JetBlue
May 12
SEA11:30 amSeattle/Tacoma Intl
5h 35m
BOS8:05 pmBoston Logan Intl
May 21
BOS7:00 amBoston Logan Intl
6h 20m
SEA10:20 amSeattle/Tacoma Intl
$262
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JetBlue
May 13
SEA11:59 pmSeattle/Tacoma Intl
11h 21m
1 stop
BOS2:20 pmBoston Logan Intl
May 16
BOS7:00 amBoston Logan Intl
6h 20m
SEA10:20 amSeattle/Tacoma Intl
$277
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JetBlue
May 11
SEA11:30 amSeattle/Tacoma Intl
5h 35m
BOS8:05 pmBoston Logan Intl
May 17
BOS1:00 pmBoston Logan Intl
10h 53m
1 stop
SEA8:53 pmSeattle/Tacoma Intl
$322
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momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Boston 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 December 2, 2025.
Use the filters below to find and compare flights from Seattle to Boston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 1/24

5:15 am-8:30 pm

2 stops12h 15m

Boston Logan Intl

Sat 1/31

8:50 am-8:10 pm

2 stops14h 20m

$254

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Fri 1/16

5:15 am-4:30 pm

1 stop8h 15m

Boston Logan Intl

Tue 1/20

4:50 pm-10:30 pm

1 stop8h 40m

$258

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 5/12

11:30 am-8:05 pm

Nonstop5h 35m

Boston Logan Intl

Sat 5/23

7:00 am-10:20 am

Nonstop6h 20m

$262

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Fri 2/13

7:25 am-10:55 pm

1 stop12h 30m

Boston Logan Intl

Wed 2/18

5:30 am-1:15 pm

1 stop10h 45m

$263

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 1/21

8:45 am-10:30 pm

2 stops10h 45m

Boston Logan Intl

Thu 1/29

1:20 pm-10:35 pm

2 stops12h 15m

$266

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 1/21

3:40 pm-11:54 pm

Nonstop5h 14m

Boston Logan Intl

Thu 1/29

6:44 pm-10:17 pm

Nonstop6h 33m

$267

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 1/10

10:20 am-10:55 pm

1 stop9h 35m

Boston Logan Intl

Sun 1/11

5:20 am-10:50 am

1 stop8h 30m

$268

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Fri 1/9

6:05 am-8:50 pm

2 stops11h 45m

Boston Logan Intl

Wed 1/14

1:20 pm-10:35 pm

2 stops12h 15m

$269

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 1/5

11:20 am-11:51 pm

1 stop9h 31m

Boston Logan Intl

Mon 1/12

12:55 pm-10:20 pm

1 stop12h 25m

$270

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 1/14

7:20 am-11:41 pm

1 stop13h 21m

Boston Logan Intl

Sat 1/17

6:45 pm-10:13 pm

Nonstop6h 28m

$271

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 Boston from

How to get the cheapest flight ticket from Seattle to Boston

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 Boston?

In general, January is the cheapest month to fly from Seattle to Boston. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $217. If you aren’t able to travel during the month of January, then book flights to Boston from Seattle during March instead. Flights to Boston in March, while not as cheap as those in January, still average around $277.

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

The cheapest day to depart from Seattle to Boston is on a Wednesday when prices can be found for as low as $350. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Boston on Sunday is $437.

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

According to our data, the cheapest time of day to fly to Boston is at noon. momondo users have found flights departing from Seattle to Boston at noon for as low as $284. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the morning is when there is more demand to fly to Boston, so prices are often more expensive at around $420 per ticket.

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

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

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

You are more likely to see cheaper flights to Boston from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Boston for around $352 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Boston from Seattle for as low as $312 on momondo.

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

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to Boston Logan 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 Seattle to Boston flights?

You could potentially save up to 23% on your flight if you consider stops on a Seattle to Boston flight.

How have Seattle to Boston flight prices changed over time?

As of December 2025, prices for Seattle to Boston flights are approximately 16% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Boston

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Boston according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Boston (SEA to BOS) flight deals and tips

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

Best Price Found

$184

Fastest flight time

5h 14m

Direct flights

Every day

Airports in Boston

1 airport
The best one-way flight to Boston from Seattle in the past 72 hours is $184. The best round-trip flight deal from Seattle to Boston found on momondo in the last 72 hours is $357.
The fastest flight from Seattle to Boston takes 5h 14m
Direct flights go from Seattle to Boston every day.
There is 1 airport near Boston: Boston Logan Intl (BOS)
Search flight deals

  • How far is Seattle/Tacoma Intl to Boston Logan Intl by plane?

    Boston Logan Intl is 2484.0 mi away from Seattle/Tacoma Intl. A reasonable flight in good conditions will take 5h 14m.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Boston Logan Intl Airport refresh daily.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Boston Logan Intl Airport.

  • What documentation or ID do you need to fly to Boston Logan Intl Airport?

    The travel and health documents required for your trip to Boston Logan Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Boston Logan Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

  • What is the most popular airline from Seattle to Boston?

Best airlines flying from Seattle to Boston

Compare and see reviews for airlines that fly from Seattle to Boston with momondo
Airline
Rating
Free Cancellation
Price
Hawaiian AirlinesPriceFrom $118Free CancellationRating
7.8
2,815 reviews
Search Hawaiian Airlines flights
JetBluePriceFrom $141Free CancellationRating
7.2
2,901 reviews
Search JetBlue flights
DeltaPriceFrom $158Free CancellationRating
7.9
8,011 reviews
Search Delta flights
United AirlinesPriceFrom $178Free CancellationRating
7.4
9,063 reviews
Search United Airlines flights
American AirlinesPriceFrom $196Free CancellationRating
7.2
11,045 reviews
Search American Airlines flights
Sun Country AirPriceFrom $221Free CancellationRating
6.9
332 reviews
Search Sun Country Air flights
Alaska AirlinesPriceFrom $231Free CancellationRating
8.0
11,388 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $281Free CancellationRating
8.0
4,253 reviews
Search Southwest flights

  • Alaska Airlines Flights From Seattle to Boston

    The lowest priced Alaska Airlines flight from Seattle to Boston from the last 72 hours was $231. Generally, Alaska Airlines has 3 flights on this route every week with an average price of $458. Alaska Airlines is rated 8.0/10 by our users.

  • Southwest Flights From Seattle to Boston

    The best Southwest deal for Seattle to Boston flight tickets found on momondo in the last 72 hours was $281, round-trip. It should be noted that an average Southwest flight deal for this route in this time was higher, at $340 round-trip. Southwest operates 1 flight out of Seattle into Boston in an average week, so prices vary by time and availability. 4,253 Southwest reviews by users on momondo have scored the airline at 8.0/10.

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Hampton Beach
Salem
Ogunquit
Old Orchard Beach
Hampton
York Beach
Plymouth
Kennebunkport
South Yarmouth
Cambridge
Narragansett
Gloucester
Nashua
Falmouth
Laconia
Brockton
Concord
Everett
Sturbridge
Chatham

Why use momondo?

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

It is quick and easy to find Seattle to Boston flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Boston that suits you.

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

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

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

momondo helps you find the best flight between Seattle and Boston by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are simply researching potential flights to Boston, momondo offers a useful price alert feature which will track prices for flights to Boston from Seattle and alert you when they change.

An easier way to manage your Boston trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
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