Cheap Flights from Boston (BOS) to Seattle (SEA) from HK$928~

View HK$928 flight on Sat, 14 Mar 2026Opens in a new window

Popular airlines from Boston to Seattle, WA (SEA-Seattle - Tacoma Intl.)

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

Prices were available within the past 7 days and start at HK$928 for one-way flights and HK$1,855 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, 7 Feb - Sat, 14 Feb
BOS
Boston
SEA
Seattle
HK$1,855 Return, found 20 hours ago
HK$1,855
Return
found 20 hours ago
Select Delta flight, departing Sat, 7 Feb from Boston to Seattle, returning Sat, 14 Feb, priced at HK$1,855 found 20 hours ago
Delta
Wed, 4 Feb - Sat, 7 Feb
BOS
Boston
SEA
Seattle
HK$2,285 Return, found 4 days ago
HK$2,285
Return
found 4 days ago
Select Delta flight, departing Wed, 4 Feb from Boston to Seattle, returning Sat, 7 Feb, priced at HK$2,285 found 4 days ago
American Airlines
Wed, 4 Feb - Sat, 7 Feb
BOS
Boston
SEA
Seattle
HK$2,286 Return, found 4 days ago
HK$2,286
Return
found 4 days ago
Select American Airlines flight, departing Wed, 4 Feb from Boston to Seattle, returning Sat, 7 Feb, priced at HK$2,286 found 4 days ago
United
Wed, 4 Feb - Sat, 7 Feb
BOS
Boston
SEA
Seattle
HK$2,320 Return, found 4 days ago
HK$2,320
Return
found 4 days ago
Select United flight, departing Wed, 4 Feb from Boston to Seattle, returning Sat, 7 Feb, priced at HK$2,320 found 4 days ago
United
Sat, 7 Feb - Sat, 14 Feb
BOS
Boston
SEA
Seattle
HK$2,416 Return, found 20 hours ago
HK$2,416
Return
found 20 hours ago
Select United flight, departing Sat, 7 Feb from Boston to Seattle, returning Sat, 14 Feb, priced at HK$2,416 found 20 hours ago
American Airlines
Wed, 4 Feb - Sat, 7 Feb
BOS
Boston
SEA
Seattle
HK$2,481 Return, found 4 days ago
HK$2,481
Return
found 4 days ago
Select American Airlines flight, departing Wed, 4 Feb from Boston to Seattle, returning Sat, 7 Feb, priced at HK$2,481 found 4 days ago
American Airlines
Sat, 7 Feb - Sat, 14 Feb
BOS
Boston
SEA
Seattle
HK$2,492 Return, found 20 hours ago
HK$2,492
Return
found 20 hours ago
Select American Airlines flight, departing Sat, 7 Feb from Boston to Seattle, returning Sat, 14 Feb, priced at HK$2,492 found 20 hours ago
United
Sat, 31 Jan - Sat, 7 Feb
BOS
Boston
SEA
Seattle
HK$2,564 Return, found 3 days ago
HK$2,564
Return
found 3 days ago
Select United flight, departing Sat, 31 Jan from Boston to Seattle, returning Sat, 7 Feb, priced at HK$2,564 found 3 days ago
United
Sat, 31 Jan - Sat, 7 Feb
BOS
Boston
SEA
Seattle
HK$2,599 Return, found 3 days ago
HK$2,599
Return
found 3 days ago
Select United flight, departing Sat, 31 Jan from Boston to Seattle, returning Sat, 7 Feb, priced at HK$2,599 found 3 days ago
American Airlines
Sat, 7 Feb - Sat, 14 Feb
BOS
Boston
SEA
Seattle
HK$2,642 Return, found 20 hours ago
HK$2,642
Return
found 20 hours ago
Select American Airlines flight, departing Sat, 7 Feb from Boston to Seattle, returning Sat, 14 Feb, priced at HK$2,642 found 20 hours ago

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

March is typically the cheapest month to fly

From HK$1,220 - HK$2,388 per traveller.

Frequently asked questions

How much is a flight from Logan Intl. Airport to SEA?
If you're planning on traveling between Logan Intl. Airport (BOS) and Sea-Tac Airport, round-trip journeys start from HK$1,855. This price is based on fares available within the last 7 days on Expedia for flights departing within the next year, so don't delay. Book today and save yourself 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 BOS to SEA?
The majority of flights can be canceled online, but whether you are charged a fee differs between airlines. If you do have to cancel your trip, follow the instructions in the Customer Service Portal.
How do I find cheap flights from Logan Intl. Airport to SEA 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 Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Logan Intl. Airport to Sea-Tac Airport?
With around 4,000 kilometers separating Boston and SeaTac, your flight will be a long one. Pack wisely to make your time on board more comfortable. Things like a sleep mask and some noise-canceling headphones can make all the difference.
Which airlines fly direct from BOS to Seattle - Tacoma Intl. Airport (SEA)?
With 117 flights every month operating from Logan Intl. Airport to Sea-Tac Airport, Alaska Airlines (AS) is a popular choice. Love some more options? Check out the airfares with Delta Air Lines (DL). This carrier offers 78 flights a month between these airports.
Are Logan Intl. Airport to Sea-Tac Airport flight tickets cheaper when they're purchased at the last minute?
Late planners can sometimes pick up a bargain, with some super cheap fares from Logan Intl. Airport to Sea-Tac Airport arising a few weeks prior to the departure date. If you'd rather book ahead of time, Expedia compares and updates all the best flight deals continuously — as early as a year in advance in some cases. It does depend on the carrier though, as not all airlines advertise prices that far in advance.

Travel information

Origin airport
Logan Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
American Airlines, Delta, United
Return price
HK$1,855
Distance
3980 km
Average flight time
4 hours 54 mins

Book with confidence

Flights from Boston to Seattle

Book cheap flights from Boston (BOS) to Seattle (SEA) on Expedia.com.hk. Find the best flight deals to destinations around the world for your next leisure or business travel on Expedia.com.hk.

Search for flights from Boston (BOS) to Seattle (SEA) to find great flight deals suitable to your travel date and time. Expedia.com.hk flight booking search engine is simple to use and looking for cheap flights is as easy as a click of a mouse or on your mobile devices.

Be 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 Boston (BOS) to Seattle (SEA) trip. Call us at 3077-4857 (direct number - 24 hours day for English).

Save more when combine your Seattle flight with a hotel for a package deal! Discover additional savings by booking in advance. Now you can find activities in Seattle and things to do in Seattle for your perfect vacation with Expedia Thing to Do.

If you would like to book flights to Seattle more flexibly, many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Seattle is HK$928 now!

 

Flights from Boston to Seattle

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