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Cheap flights from Seattle to Boston from $119

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 10/3. 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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Cheap round-trip flights

JetBlue Logo
1:10 pm - 9:46 pmSEA-BOS
5h 36mnonstop
JetBlue Logo
8:20 am - 11:59 amBOS-SEA
6h 39mnonstop
$175JetBlue
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Sat, Oct 18 - Fri, Oct 24
JetBlue Logo
1:10 pm - 9:46 pmSEA-BOS
5h 36mnonstop
JetBlue Logo
8:20 am - 11:59 amBOS-SEA
6h 39mnonstop
$178JetBlue
Find Deal
Sat, Oct 18 - Fri, Oct 24
JetBlue Logo
1:10 pm - 9:46 pmSEA-BOS
5h 36mnonstop
JetBlue Logo
8:20 am - 11:59 amBOS-SEA
6h 39mnonstop
$181JetBlue
Find Deal
Sat, Oct 18 - Fri, Oct 24
American Airlines Logo
11:05 pm - 10:10 amSEA-BOS
8h 05m1 stop
American Airlines Logo
12:52 pm - 8:09 pmBOS-SEA
10h 17m1 stop
$197American Airlines
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Tue, Sep 30 - Sat, Oct 4
Alaska Airlines Logo
3:59 pm - 12:20 amSEA-BOS
5h 21mnonstop
Alaska Airlines Logo
7:00 am - 10:35 amBOS-SEA
6h 35mnonstop
$205Alaska Airlines
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Thu, Oct 30 - Tue, Nov 4
American Airlines Logo
10:54 pm - 12:24 pmSEA-BOS
10h 30m1 stop
American Airlines Logo
5:24 am - 1:46 pmBOS-SEA
11h 22m1 stop
$207American Airlines
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Fri, Oct 24 - Fri, Oct 31
Delta Logo
10:05 pm - 6:35 amSEA-BOS
5h 30mnonstop
Delta Logo
7:20 am - 10:45 amBOS-SEA
6h 25mnonstop
$217Delta
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Fri, Oct 24 - Fri, Oct 31
Alaska Airlines Logo
3:35 pm - 11:59 pmSEA-BOS
5h 24mnonstop
Alaska Airlines Logo
8:25 pm - 10:34 amBOS-SEA
17h 09m1 stop
$227Alaska Airlines
Find Deal
Sat, Oct 18 - Fri, Oct 24
Hawaiian Airlines Logo
3:35 pm - 11:59 pmSEA-BOS
5h 24mnonstop
Hawaiian Airlines Logo
6:15 am - 2:35 pmBOS-SEA
11h 20m1 stop
$234Hawaiian Airlines
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Sat, Oct 18 - Fri, Oct 24
Hawaiian Airlines Logo
9:00 am - 5:20 pmSEA-BOS
5h 20mnonstop
Hawaiian Airlines Logo
7:00 am - 10:35 amBOS-SEA
6h 35mnonstop
$258Hawaiian Airlines
Find Deal
Tue, Dec 9 - Fri, Dec 12

Hawaiian Airlines flights from Seattle to Boston

Our best Hawaiian Airlines deals on Seattle to Boston flight tickets
Hawaiian Airlines
Oct 18
SEA3:35 pmSeattle/Tacoma Intl
5h 24m
BOS11:59 pmBoston Logan Intl
Oct 24
BOS6:15 amBoston Logan Intl
11h 20m
1 stop
SEA2:35 pmSeattle/Tacoma Intl
$234
Find similar
Hawaiian Airlines
Dec 9
SEA9:00 amSeattle/Tacoma Intl
5h 20m
BOS5:20 pmBoston Logan Intl
Dec 12
BOS7:00 amBoston Logan Intl
6h 35m
SEA10:35 amSeattle/Tacoma Intl
$258
Find similar

United Airlines flights from Seattle to Boston

Our best United Airlines deals on Seattle to Boston flight tickets
United Airlines
Sep 29
SEA6:55 pmSeattle/Tacoma Intl
8h 05m
1 stop
BOS6:00 amBoston Logan Intl
Oct 1
BOS6:00 amBoston Logan Intl
8h 31m
1 stop
SEA11:31 amSeattle/Tacoma Intl
$244
Find similar
United Airlines
Sep 24
SEA12:43 pmSeattle/Tacoma Intl
8h 03m
1 stop
BOS11:46 pmBoston Logan Intl
Sep 30
BOS8:15 amBoston Logan Intl
11h 05m
1 stop
SEA4:20 pmSeattle/Tacoma Intl
$352
Find similar
United Airlines
Sep 24
SEA12:43 pmSeattle/Tacoma Intl
8h 03m
1 stop
BOS11:46 pmBoston Logan Intl
Oct 2
BOS8:15 amBoston Logan Intl
11h 09m
1 stop
SEA4:24 pmSeattle/Tacoma Intl
$372
Find similar

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 September 16, 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 10/18

1:10 pm-9:46 pm

Nonstop5h 36m

Boston Logan Intl

Fri 10/24

8:20 am-11:59 am

Nonstop6h 39m

$175

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 10/18

1:10 pm-9:46 pm

Nonstop5h 36m

Boston Logan Intl

Fri 10/24

8:20 am-11:59 am

Nonstop6h 39m

$178

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 10/18

1:10 pm-9:46 pm

Nonstop5h 36m

Boston Logan Intl

Fri 10/24

8:20 am-11:59 am

Nonstop6h 39m

$181

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 9/30

11:05 pm-10:10 am

1 stop8h 05m

Boston Logan Intl

Sat 10/4

12:52 pm-8:09 pm

1 stop10h 17m

$197

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 10/30

3:59 pm-12:20 am

Nonstop5h 21m

Boston Logan Intl

Tue 11/4

7:00 am-10:35 am

Nonstop6h 35m

$205

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Fri 10/24

10:54 pm-12:24 pm

1 stop10h 30m

Boston Logan Intl

Fri 10/31

5:24 am-1:46 pm

1 stop11h 22m

$207

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Fri 10/24

10:05 pm-6:35 am

Nonstop5h 30m

Boston Logan Intl

Fri 10/31

7:20 am-10:45 am

Nonstop6h 25m

$217

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 10/18

3:35 pm-11:59 pm

Nonstop5h 24m

Boston Logan Intl

Fri 10/24

8:25 pm-10:34 am

1 stop17h 09m

$227

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 10/18

3:35 pm-11:59 pm

Nonstop5h 24m

Boston Logan Intl

Fri 10/24

6:15 am-2:35 pm

1 stop11h 20m

$234

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 12/9

9:00 am-5:20 pm

Nonstop5h 20m

Boston Logan Intl

Fri 12/12

7:00 am-10:35 am

Nonstop6h 35m

$258

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 $267.

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 $342. 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 $412.

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 $314. 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 $403 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 $347 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 $293 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?

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

How have Seattle to Boston flight prices changed over time?

As of September 2025, prices for Seattle to Boston flights are approximately 22% 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

$182

Fastest flight time

5h 17m

Direct flights

Every day

Airports in Boston

1 airport
The best one-way flight to Boston from Seattle in the past 72 hours is $182. The best round-trip flight deal from Seattle to Boston found on momondo in the last 72 hours is $246.
The fastest flight from Seattle to Boston takes 5h 17m
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 20m.

  • 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
2,724 reviews
Search Hawaiian Airlines flights
JetBluePriceFrom $131Free CancellationRating
7.2
2,914 reviews
Search JetBlue flights
DeltaPriceFrom $152Free CancellationRating
7.9
7,957 reviews
Search Delta flights
United AirlinesPriceFrom $178Free CancellationRating
7.4
8,924 reviews
Search United Airlines flights
American AirlinesPriceFrom $196Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Sun Country AirPriceFrom $216Free CancellationRating
6.9
330 reviews
Search Sun Country Air flights
Alaska AirlinesPriceFrom $227Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $281Free CancellationRating
8.0
4,242 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 $227. Generally, Alaska Airlines has 21 flights on this route every week with an average price of $459. Alaska Airlines is rated 8.0/10 by our users.

  • Delta Flights From Seattle to Boston

    The best Delta deal for Seattle to Boston flight tickets found on momondo in the last 72 hours was $152, round-trip. It should be noted that an average Delta flight deal for this route in this time was higher, at $374 round-trip. Delta operates 19 flights out of Seattle into Boston in an average week, so prices vary by time and availability. 7,957 Delta reviews by users on momondo have scored the airline at 7.9/10.

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
Cambridge
South Yarmouth
Narragansett
Nashua
Gloucester
Brockton
Laconia
Falmouth
Concord
Everett
Wells
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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