RM612 Cheap Flights from Seattle (SEA) to Boston (BOS)

View RM612 flight on Wed, 15 Jul 2026Opens 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 to Boston (SEA-BOS)

Prices were available within the past 7 days and start at RM612 for one-way flights and RM1,359 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Mon, 14 Sept - Wed, 16 Sept
SEA
Seattle
BOS
Boston
RM1,359 Return, found 4 days ago
RM1,359
Return
found 4 days ago
Select Delta flight, departing Mon, 14 Sept from Seattle to Boston, returning Wed, 16 Sept, priced at RM1,359 found 4 days ago
Delta
Mon, 14 Sept - Wed, 16 Sept
SEA
Seattle
BOS
Boston
RM1,379 Return, found 4 days ago
RM1,379
Return
found 4 days ago
Select Delta flight, departing Mon, 14 Sept from Seattle to Boston, returning Wed, 16 Sept, priced at RM1,379 found 4 days ago
United
Mon, 14 Sept - Wed, 16 Sept
SEA
Seattle
BOS
Boston
RM1,458 Return, found 4 days ago
RM1,458
Return
found 4 days ago
Select United flight, departing Mon, 14 Sept from Seattle to Boston, returning Wed, 16 Sept, priced at RM1,458 found 4 days ago
Delta
Mon, 14 Sept - Wed, 16 Sept
SEA
Seattle
BOS
Boston
RM1,557 Return, found 4 days ago
RM1,557
Return
found 4 days ago
Select Delta flight, departing Mon, 14 Sept from Seattle to Boston, returning Wed, 16 Sept, priced at RM1,557 found 4 days ago
Delta
Mon, 14 Sept - Wed, 16 Sept
SEA
Seattle
BOS
Boston
RM1,577 Return, found 4 days ago
RM1,577
Return
found 4 days ago
Select Delta flight, departing Mon, 14 Sept from Seattle to Boston, returning Wed, 16 Sept, priced at RM1,577 found 4 days ago
Delta
Mon, 14 Sept - Wed, 16 Sept
SEA
Seattle
BOS
Boston
RM1,580 Return, found 4 days ago
RM1,580
Return
found 4 days ago
Select Delta flight, departing Mon, 14 Sept from Seattle to Boston, returning Wed, 16 Sept, priced at RM1,580 found 4 days ago
United
Mon, 14 Sept - Wed, 16 Sept
SEA
Seattle
BOS
Boston
RM1,618 Return, found 4 days ago
RM1,618
Return
found 4 days ago
Select United flight, departing Mon, 14 Sept from Seattle to Boston, returning Wed, 16 Sept, priced at RM1,618 found 4 days ago
American Airlines
Mon, 14 Sept - Wed, 16 Sept
SEA
Seattle
BOS
Boston
RM1,655 Return, found 4 days ago
RM1,655
Return
found 4 days ago
Select American Airlines flight, departing Mon, 14 Sept from Seattle to Boston, returning Wed, 16 Sept, priced at RM1,655 found 4 days ago
United
Mon, 14 Sept - Wed, 16 Sept
SEA
Seattle
BOS
Boston
RM1,655 Return, found 4 days ago
RM1,655
Return
found 4 days ago
Select United flight, departing Mon, 14 Sept from Seattle to Boston, returning Wed, 16 Sept, priced at RM1,655 found 4 days ago
United
Mon, 14 Sept - Wed, 16 Sept
SEA
Seattle
BOS
Boston
RM1,658 Return, found 4 days ago
RM1,658
Return
found 4 days ago
Select United flight, departing Mon, 14 Sept from Seattle to Boston, returning Wed, 16 Sept, priced at RM1,658 found 4 days ago

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

September is typically the cheapest month to fly

From RM 1,136 - RM 1,494 per traveller.

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 RM1,359. 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.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Logan Intl.
Return price
RM1,359
Distance
3980 km
Average flight time
8 hours 32 mins

Book with confidence

Perfect flights from Seattle to Boston

Your Journey from Seattle to Boston

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Choosing Your Ideal Flight

With Expedia, you have access to a wide range of airlines, including Delta, American Airlines, United. Our selection of flights from Seattle - Tacoma Intl. to Logan Intl. caters to every traveler's requirements, ensuring your journey aligns with your schedule. With options from 20 airlines, you're bound to find the perfect flight.
 

Maximizing Value with Seattle to Boston Flights

Experience the joy of finding cheap flights from Seattle - Tacoma Intl. to Logan Intl. that fit your budget. Keep an eye out for our special deals and discounts, and check our flexible one-way fares from RM612 and roundtrip prices from RM1,359*.
 

Pre-Flight Essentials

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Experience the Vibrant Boston

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With Expedia, your adventure extends beyond the flight. Explore Boston at your own pace by renting a car or booking a hotel. Discover hidden gems off the beaten path and create unforgettable memories.
 

Book Your Flight from Seattle to Boston with Confidence

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*Note: Prices may vary based on availability and are subject to change.
Perfect flights from Seattle to Boston

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