฿3,860 Cheap Flights from Seattle (SEA) to Boston (BOS)

View ฿3,860 flight on Mon, 22 Sept 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Logan International Airport (BOS)

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Cheap Flights from Seattle (SEA) to Boston (BOS)

Prices were available within the past 7 days and start at ฿3,860 for one-way flights and ฿7,715 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Mon, 22 Sept - Fri, 26 Sept
SEA
Seattle
BOS
Boston
฿7,715 Return, found 7 hours ago
฿7,715
Return
found 7 hours ago
Select Delta flight, departing Mon, 22 Sept from Seattle to Boston, returning Fri, 26 Sept, priced at ฿7,715 found 7 hours ago
American Airlines
Mon, 22 Sept - Fri, 26 Sept
SEA
Seattle
BOS
Boston
฿8,530 Return, found 7 hours ago
฿8,530
Return
found 7 hours ago
Select American Airlines flight, departing Mon, 22 Sept from Seattle to Boston, returning Fri, 26 Sept, priced at ฿8,530 found 7 hours ago
American Airlines
Mon, 22 Sept - Fri, 26 Sept
SEA
Seattle
BOS
Boston
฿9,335 Return, found 7 hours ago
฿9,335
Return
found 7 hours ago
Select American Airlines flight, departing Mon, 22 Sept from Seattle to Boston, returning Fri, 26 Sept, priced at ฿9,335 found 7 hours ago
American Airlines
Tue, 30 Sept - Tue, 7 Oct
SEA
Seattle
BOS
Boston
฿9,495 Return, found 4 days ago
฿9,495
Return
found 4 days ago
Select American Airlines flight, departing Tue, 30 Sept from Seattle to Boston, returning Tue, 7 Oct, priced at ฿9,495 found 4 days ago
Delta
Tue, 30 Sept - Tue, 7 Oct
SEA
Seattle
BOS
Boston
฿9,505 Return, found 4 days ago
฿9,505
Return
found 4 days ago
Select Delta flight, departing Tue, 30 Sept from Seattle to Boston, returning Tue, 7 Oct, priced at ฿9,505 found 4 days ago
United
Mon, 22 Sept - Fri, 26 Sept
SEA
Seattle
BOS
Boston
฿9,570 Return, found 7 hours ago
฿9,570
Return
found 7 hours ago
Select United flight, departing Mon, 22 Sept from Seattle to Boston, returning Fri, 26 Sept, priced at ฿9,570 found 7 hours ago
American Airlines
Sat, 20 Sept - Fri, 26 Sept
SEA
Seattle
BOS
Boston
฿9,660 Return, found 3 days ago
฿9,660
Return
found 3 days ago
Select American Airlines flight, departing Sat, 20 Sept from Seattle to Boston, returning Fri, 26 Sept, priced at ฿9,660 found 3 days ago
United
Wed, 17 Sept - Wed, 24 Sept
SEA
Seattle
BOS
Boston
฿9,665 Return, found 3 days ago
฿9,665
Return
found 3 days ago
Select United flight, departing Wed, 17 Sept from Seattle to Boston, returning Wed, 24 Sept, priced at ฿9,665 found 3 days ago
Delta
Mon, 22 Sept - Fri, 26 Sept
SEA
Seattle
BOS
Boston
฿9,740 Return, found 7 hours ago
฿9,740
Return
found 7 hours ago
Select Delta flight, departing Mon, 22 Sept from Seattle to Boston, returning Fri, 26 Sept, priced at ฿9,740 found 7 hours ago
American Airlines
Wed, 1 Oct - Wed, 8 Oct
SEA
Seattle
BOS
Boston
฿9,835 Return, found 3 days ago
฿9,835
Return
found 3 days ago
Select American Airlines flight, departing Wed, 1 Oct from Seattle to Boston, returning Wed, 8 Oct, priced at ฿9,835 found 3 days ago

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

January is typically the cheapest month to fly

From ฿5,049 - ฿10,226 per traveller.
Flight from Seattle to Boston route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Logan Intl.
Return price
฿7,715
Distance
3980 km
Average flight time
8 hours 31 mins

Perfect flights from Seattle to Boston

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from Seattle to Boston. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of Boston, surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Seattle - Tacoma Intl. to Logan Intl. ticket options cater to your travel preferences, with incredible one-way fares from ฿3,860 and roundtrip prices from ฿7,715. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at Logan Intl. and explore Boston and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your SEA to BOS travel arrangements today and embark on the journey of a lifetime in Boston.

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 ฿7,715. 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.

Explore a world of travel with Expedia

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