Flight Routes from Boston to Seattle Tacoma

Trip type

Our cheapest offers for flights from Boston to Seattle Tacoma

Here you can compare cheap flights from Boston (BOS) to Seattle Tacoma (SEA) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Seattle Tacoma. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
Boston
Seattle-Tacoma
Outbound
05/16/26
2 Stopovers (ATL, LAX)
F93085, F94315, F91177
14h 42min
Return
05/29/26
direct
AS0460
05h 32min
Frontier Airlines ?
$299
Best option
Boston
Seattle-Tacoma
Outbound
07/26/26
direct
AS1337
06h 29min
Return
08/05/26
direct
AS1333
05h 33min
Alaska Airlines
$467
Boston
Seattle-Tacoma
Outbound
05/16/26
1 Stopover (SAN)
AS0539, AS0685
10h 54min
Return
05/29/26
direct
AS0460
05h 32min
Alaska Airlines ?
$343
Boston
Seattle-Tacoma
Outbound
05/16/26
1 Stopover (SAN)
AS0539, AS0685
10h 54min
Return
05/29/26
direct
AS0460
05h 32min
Alaska Airlines
$362
Boston
Seattle-Tacoma
Outbound
07/26/26
direct
AS1337
06h 29min
Return
08/05/26
1 Stopover (ORD)
AA2922, AA2682
14h 52min
Alaska Airlines ?
$373
Boston
Seattle-Tacoma
Outbound
05/16/26
1 Stopover (SAN)
AS0539, AS0685
10h 54min
Return
05/29/26
direct
AS0460
05h 32min
Alaska Airlines ?
$384
Boston
Seattle-Tacoma
Outbound
07/26/26
direct
AS1337
06h 29min
Return
08/05/26
1 Stopover (SAN)
AS1388, AS0255
09h 50min
Alaska Airlines ?
$410
Boston
Seattle-Tacoma
Outbound
07/26/26
direct
AS1337
06h 29min
Return
08/05/26
1 Stopover (PDX)
AS2302, AS0436
10h 16min
Alaska Airlines
$412
Boston
Seattle-Tacoma
Outbound
05/16/26
1 Stopover (SAN)
AS0539, AS0685
10h 54min
Return
05/29/26
direct
AS0460
05h 32min
Alaska Airlines ?
$418
Boston
Seattle-Tacoma
Outbound
06/25/26
direct
B60397
06h 23min
Return
06/30/26
1 Stopover (DFW)
AA2429, AA1595
11h 27min
JetBlue Airways ?
$446
Prices based on recent searches, subject to last-minute changes
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Tips and tricks to help you find cheap flights from Boston to Seattle Tacoma

Favorite airline: e.g. Alaska Airlines, Spirit Airlines
Flight tickets on the route Boston – Seattle-Tacoma are most frequently booked with Alaska Airlines.
Alaska Airlines
22 %
Spirit Airlines
22 %
Delta
19 %
Stopover flights are the cheapest connection
Direct flights on this route are $164.00 more expensive on average than flights with a stopover.
non stop flight
1 stop
2 stops
06h 23min
17h 53min
24h 10min
$488
$352
$324
The favorite connection is non-stop
52 % of travelers decide to book a direct flight on this route.
Route
bookings
Direct flights
06h 23min, from $488
52 %
1 stopover Minneapolis - St. Paul International Airport, MN
14h 37min, from $517
19 %
2 stopovers Hartsfield-Jackson Atlanta International Airport, GA Las Vegas - McCarran International Airport, NV
24h 10min, from $324
14 %

Important flight information

Flight information: Boston - Seattle-Tacoma

Roundtrip from $298.83
Flight duration min. 06:33 / max. 10:40
Return flight duration min. 05:08/ max. 08:15
Distance 4010 km
Flights per week 57
Departure airport Airport Boston Logan International Airport, MA (BOS)
Arrival airport Airport Seattle-Tacoma International Airport, WA (SEA)
Destination country Flights to United States
Alternative routes to United States
Alternative flights to Seattle-Tacoma
Flight destinations with a similar price
Flight destinations with a similar price