S$167 Cheap Flights from Seattle to Boston

View S$167 flight on Wed, 21 Jan, 2026Opens in a new window

Popular airlines from Seattle to Boston

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Cheap Flights from Seattle to Boston (SEA-BOS)

Prices were available within the past 7 days and start at S$167 for one-way flights and S$333 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, 19 Mar - Tue, 24 Mar
SEA
Seattle
BOS
Boston
S$333 Return, found 5 days ago
S$333
Return
found 5 days ago
Select Delta flight, departing Thu, 19 Mar from Seattle to Boston, returning Tue, 24 Mar, priced at S$333 found 5 days ago
Delta
Thu, 19 Mar - Tue, 24 Mar
SEA
Seattle
BOS
Boston
S$346 Return, found 5 days ago
S$346
Return
found 5 days ago
Select Delta flight, departing Thu, 19 Mar from Seattle to Boston, returning Tue, 24 Mar, priced at S$346 found 5 days ago
Delta
Thu, 19 Mar - Tue, 24 Mar
SEA
Seattle
BOS
Boston
S$462 Return, found 5 days ago
S$462
Return
found 5 days ago
Select Delta flight, departing Thu, 19 Mar from Seattle to Boston, returning Tue, 24 Mar, priced at S$462 found 5 days ago
Delta
Thu, 19 Mar - Tue, 24 Mar
SEA
Seattle
BOS
Boston
S$468 Return, found 5 days ago
S$468
Return
found 5 days ago
Select Delta flight, departing Thu, 19 Mar from Seattle to Boston, returning Tue, 24 Mar, priced at S$468 found 5 days ago
Delta
Thu, 19 Mar - Tue, 24 Mar
SEA
Seattle
BOS
Boston
S$490 Return, found 5 days ago
S$490
Return
found 5 days ago
Select Delta flight, departing Thu, 19 Mar from Seattle to Boston, returning Tue, 24 Mar, priced at S$490 found 5 days ago
United
Thu, 19 Mar - Tue, 24 Mar
SEA
Seattle
BOS
Boston
S$503 Return, found 5 days ago
S$503
Return
found 5 days ago
Select United flight, departing Thu, 19 Mar from Seattle to Boston, returning Tue, 24 Mar, priced at S$503 found 5 days ago
Delta
Thu, 15 Jan - Mon, 19 Jan
SEA
Seattle
BOS
Boston
S$596 Return, found 11 hours ago
S$596
Return
found 11 hours ago
Select Delta flight, departing Thu, 15 Jan from Seattle to Boston, returning Mon, 19 Jan, priced at S$596 found 11 hours ago
American Airlines
Thu, 15 Jan - Mon, 19 Jan
SEA
Seattle
BOS
Boston
S$597 Return, found 11 hours ago
S$597
Return
found 11 hours ago
Select American Airlines flight, departing Thu, 15 Jan from Seattle to Boston, returning Mon, 19 Jan, priced at S$597 found 11 hours ago
Delta
Thu, 15 Jan - Mon, 19 Jan
SEA
Seattle
BOS
Boston
S$602 Return, found 11 hours ago
S$602
Return
found 11 hours ago
Select Delta flight, departing Thu, 15 Jan from Seattle to Boston, returning Mon, 19 Jan, priced at S$602 found 11 hours ago
Delta
Thu, 15 Jan - Mon, 19 Jan
SEA
Seattle
BOS
Boston
S$605 Return, found 11 hours ago
S$605
Return
found 11 hours ago
Select Delta flight, departing Thu, 15 Jan from Seattle to Boston, returning Mon, 19 Jan, priced at S$605 found 11 hours ago

Find the cheapest month to fly from Seattle (SEA) to Boston (BOS)

March is typically the cheapest month to fly

From S$203 - S$398 per traveller.
Seattle to Boston route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Logan Intl.
Return price
S$332
Distance
3980 km
Average flight time
8 hours 57 mins

Flights from Seattle to Boston

There are several airlines that operate frequent flights from Seattle (SEA) to Boston (BOS) including

The earliest flight leaves Seattle Tacoma Intl. Airport at 07:00 and arrives at Logan Intl. Airport at 05:37. The last flight of the day departs Seattle at 23:59 and arrives at Boston at 23:59.

The flight distance from Seattle to Boston is about 4026 km, the shortest flight is 05 hours 05 minutes with .

Expedia lets you search across the largest number of airlines and Boston flights, which means that you’ll be able to find a great flight deal at the perfect travel date and time. Our simple-to-use booking engine makes looking for terrific bargains easy and hassle-free; just enter your travel dates and departure city, and let Expedia do the rest! Adjust your travel dates and explore connecting flights to find an even better deal on your Seattle Boston flight!

Browse through dozens of options and rest assured that you’re seeing the best price guaranteed! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your Seattle to Boston trip. There’s simply no substitute for great prices suited to your travel needs and backed by excellent customer support.

Combine your Boston flight with a hotel and/or car rental for a package deal designed to save you even more money! Discover additional savings by booking in advance or find a last minute deal. There are tons of ways to save on your flights from Seattle to Boston with Expedia. Use us as your stop travel destination and have the confidence that you’re getting a bargain!

Frequently asked questions

How much is a flight from SEA to Logan Intl. Airport (BOS)?
If you're travelling from Sea-Tac Airport to BOS, round-trip flights start from S$333. This figure is based on fares listed within the last 7 days on Expedia for flights departing within the next year, so don't wait around. Book today and save yourself both money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Seattle - Tacoma Intl. Airport (SEA) to BOS?
We get that your situation can change unexpectedly, so we've made it as hassle-free as possible for you to cancel your flight online. Just head to the Customer Service Portal and follow the instructions.
How do I find cheap flights from Seattle - Tacoma Intl. Airport (SEA) to Logan Intl. Airport (BOS) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for SEA to Logan Intl. Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Sea-Tac Airport to Logan Intl. Airport?
With around 4,000 kilometres separating Sea-Tac Airport and Logan Intl. Airport, your flight will be a long one. Pack wisely to make your time in the air more comfortable. Simple things like an eye mask and a quality neck pillow can make a massive difference.
Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to Logan Intl. Airport?
A popular airline that operates on the route from SEA to Logan Intl. Airport (BOS) is Alaska Airlines (AS). It offers 117 flights a month. Like some more options? Check out the airfares with Delta Air Lines (DL). This carrier offers 78 monthly flights between these airports.
Are Sea-Tac Airport to BOS flight tickets cheaper when they're purchased at the last minute?
It is possible to nab great last-minute deals from Sea-Tac Airport to BOS, but there's no guarantee. As many airlines advertise prices up to a year in advance, it's worth keeping an eye on fares early and being ready to pounce when you spot a bargain. Expedia compares air carrier prices and updates flight deals all the time, so you can feel confident knowing you're always getting the latest offers.

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