Cheap Flights from Boston, MA to Seattle, WA from $154
On Cheapflightsplus.com you will find 2 direct and 47 connecting flights from Boston to Seattle. You can compare airfare deals from 4 airlines and multiple travel sites from $154, book and save on cheap plane tickets and last minute offers. Also check out BOS-SEA flight schedule to find best flight time, convenient departure and arrival airports.
Find One-Way and Round-Trip Boston to Seattle Flight Deals
Best Flights from Boston to Seattle Today
Price | Departure | Arrival | Flight Duration | Airline | Flight |
---|---|---|---|---|---|
from $246 | 16:25 Boston Logan | 19:48 Seattle Seattle-Tacoma Intl | 6h 23m | Hawaiian Airlines | HA4808 |
from $250 | 16:25 Boston Logan | 19:48 Seattle Seattle-Tacoma Intl | 6h 23m | Alaska Airlines | AS304 |
from $182 | 19:12 Boston Logan | 00:56+1 день Seattle Seattle-Tacoma Intl | 8h 44m layover 1h 8m - Washington D.C. | United Airlines | UA2136 UA716 |
from $182 | 16:57 Boston Logan | 22:59 Seattle Seattle-Tacoma Intl | 9h 2m layover 1h 14m - Denver | United Airlines | UA800 UA2651 |
from $182 | 14:00 Boston Logan | 20:56 Seattle Seattle-Tacoma Intl | 9h 56m layover 1h 9m - San Francisco | United Airlines | UA1074 UA2019 |
from $182 | 16:27 Boston Logan | 23:59 Seattle Seattle-Tacoma Intl | 10h 32m layover 2h 56m - Chicago | United Airlines | UA2040 UA1001 |
from $183 | 06:55 Boston Logan | 12:11 Seattle Seattle-Tacoma Intl | 8h 16m layover 0h 46m - Newark | United Airlines | UA570 UA2364 |
from $183 | 05:30 Boston Logan | 11:35 Seattle Seattle-Tacoma Intl | 9h 5m layover 1h 41m - Washington D.C. | United Airlines | UA1734 UA2665 |
from $183 | 12:29 Boston Logan | 20:41 Seattle Seattle-Tacoma Intl | 11h 12m layover 3h 39m - Washington D.C. | United Airlines | UA411 UA326 |
from $221 | 20:19 Boston Logan | 08:04+1 день Seattle Seattle-Tacoma Intl | 14h 45m layover 6h 1m - San Francisco | Hawaiian Airlines | HA4812 HA7023 |
from $230 | 20:19 Boston Logan | 08:04+1 день Seattle Seattle-Tacoma Intl | 14h 45m layover 6h 1m - San Francisco | Alaska Airlines | AS355 AS981 |
from $236 | 18:03 Boston Logan | 23:59 Seattle Seattle-Tacoma Intl | 8h 56m layover 1h 16m - Chicago | United Airlines | UA1015 UA1001 |
from $246 | 06:00 Boston Logan | 11:32 Seattle Seattle-Tacoma Intl | 8h 32m layover 0h 47m - Chicago | United Airlines | UA1414 UA1414 |
from $247 | 09:35 Boston Logan | 16:20 Seattle Seattle-Tacoma Intl | 9h 45m layover 2h 14m - Chicago | United Airlines | UA378 UA1485 |
from $154 | 21:40 Boston Logan | 15:03+1 день Seattle Seattle-Tacoma Intl | 20h 23m layover 6h 47m - Baltimore 4h 8m - Las Vegas | Spirit Airlines | NK2523 NK2015 NK2327 |
from $472 | 14:46 Boston Logan | 23:59 Seattle Seattle-Tacoma Intl | 12h 13m layover 0h 48m - Washington D.C. 2h 31m - Chicago | United Airlines | UA539 UA2497 UA1001 |
Flight Schedule Boston (Massachusetts) to Seattle (Washington)
Departure | Arrival | Flight Details | Flight Duration | Price |
---|---|---|---|---|
16:25 — 19:48
|
16:25 — 19:48
HA4808
Hawaiian Airlines
Boston — Seattle
|
6h 23m |
Find flight
from$246 |
|
16:25 — 19:48
|
16:25 — 19:48
AS304
Alaska Airlines
Boston — Seattle
|
6h 23m |
Find flight
from$250 |
|
05:30 — 11:35
|
05:30 — 07:04
UA1734
United Airlines
Boston — Washington D.C.
1h 41m stop
08:45 — 11:35
UA2665
United Airlines
Washington D.C. — Seattle
|
9h 5m including layover |
Find flight
from$183 |
|
06:00 — 11:32
|
06:00 — 07:58
UA1414
United Airlines
Boston — Chicago
47m stop
08:45 — 11:32
UA1414
United Airlines
Chicago — Seattle
|
8h 32m including layover |
Find flight
from$246 |
|
06:55 — 12:11
|
07:00 — 08:21
UA570
United Airlines
Boston — Newark
46m stop
09:51 — 12:59
UA2364
United Airlines
Newark — Seattle
|
8h 16m including layover |
Find flight
from$183 |
|
07:30 — 16:54
|
07:30 — 11:07
AS308
Alaska Airlines
Boston — San Francisco
3h 38m stop
14:45 — 16:54
AS1225
Alaska Airlines
San Francisco — Seattle
|
12h 24m including layover |
Find flight
from$367 |
|
07:30 — 16:54
|
07:00 — 10:49
HA4826
Hawaiian Airlines
Boston — San Francisco
3h 38m stop
14:39 — 16:50
HA7030
Hawaiian Airlines
San Francisco — Seattle
|
12h 24m including layover |
Find flight
from$401 |
|
08:21 — 15:42
|
07:00 — 09:05
AS4570
Alaska Airlines
Boston — Chicago
2h 47m stop
13:01 — 15:35
AS891
Alaska Airlines
Chicago — Seattle
|
10h 21m including layover |
Find flight
from$273 |
|
08:41 — 16:47
|
08:35 — 12:06
UA1008
United Airlines
Boston — San Francisco
2h 18m stop
14:30 — 16:47
UA5917
United Airlines
San Francisco — Seattle
|
11h 6m including layover |
Find flight
from$292 |
|
09:35 — 16:20
|
09:35 — 11:26
UA378
United Airlines
Boston — Chicago
2h 14m stop
13:40 — 16:20
UA1485
United Airlines
Chicago — Seattle
|
9h 45m including layover |
Find flight
from$247 |
|
09:35 — 15:42
|
09:35 — 11:26
UA378
United Airlines
Boston — Chicago
1h 37m stop
13:03 — 15:42
HA6300
Hawaiian Airlines
Chicago — Seattle
|
9h 7m including layover |
Find flight
from$777 |
|
10:40 — 16:20
|
10:40 — 12:31
UA1298
United Airlines
Boston — Chicago
1h 9m stop
13:40 — 16:20
UA1485
United Airlines
Chicago — Seattle
|
8h 40m including layover |
Find flight
from$438 |
|
11:42 — 17:39
|
11:30 — 14:20
UA414
United Airlines
Boston — Denver
1h 25m stop
15:59 — 18:04
UA745
United Airlines
Denver — Seattle
|
8h 57m including layover |
Find flight
from$370 |
|
12:29 — 20:41
|
12:29 — 14:09
UA411
United Airlines
Boston — Washington D.C.
3h 39m stop
17:48 — 20:41
UA326
United Airlines
Washington D.C. — Seattle
|
11h 12m including layover |
Find flight
from$183 |
|
12:29 — 20:48
|
12:29 — 14:09
UA1365
United Airlines
Boston — Washington D.C.
3h 46m stop
17:55 — 20:48
UA326
United Airlines
Washington D.C. — Seattle
|
11h 19m including layover |
Find flight
from$467 |
|
13:22 — 21:23
|
13:22 — 15:55
UA497
United Airlines
Boston — Denver
3h 30m stop
19:25 — 21:23
UA299
United Airlines
Denver — Seattle
|
11h 1m including layover |
Find flight
from$467 |
|
13:30 — 21:17
|
13:30 — 14:57
UA2454
United Airlines
Boston — Newark
3h 2m stop
17:59 — 21:17
UA2044
United Airlines
Newark — Seattle
|
10h 47m including layover |
Find flight
from$467 |
|
14:00 — 20:56
|
14:00 — 17:31
UA1074
United Airlines
Boston — San Francisco
1h 9m stop
18:55 — 21:11
UA2019
United Airlines
San Francisco — Seattle
|
9h 56m including layover |
Find flight
from$182 |
|
14:46 — 20:48
|
14:46 — 16:30
UA539
United Airlines
Boston — Washington D.C.
1h 25m stop
17:55 — 20:48
UA326
United Airlines
Washington D.C. — Seattle
|
9h 2m including layover |
Find flight
from$245 |
|
15:15 — 22:18
|
15:15 — 17:59
UA702
United Airlines
Boston — Denver
2h 21m stop
20:20 — 22:18
UA2651
United Airlines
Denver — Seattle
|
10h 3m including layover |
Find flight
from$292 |
|
16:27 — 23:59
|
16:27 — 18:20
UA2040
United Airlines
Boston — Chicago
2h 56m stop
21:16 — 23:59
UA1001
United Airlines
Chicago — Seattle
|
10h 32m including layover |
Find flight
from$182 |
|
16:57 — 22:59
|
16:57 — 19:46
UA800
United Airlines
Boston — Denver
1h 14m stop
21:00 — 22:59
UA2651
United Airlines
Denver — Seattle
|
9h 2m including layover |
Find flight
from$182 |
|
17:06 — 21:54
|
17:06 — 20:24
HA6255
Hawaiian Airlines
Boston — Portland
35m stop
20:59 — 21:54
HA6567
Hawaiian Airlines
Portland — Seattle
|
7h 48m including layover |
Find flight
from$248 |
|
17:06 — 22:59
|
17:06 — 20:24
AS1319
Alaska Airlines
Boston — Portland
1h 35m stop
21:59 — 22:59
AS3408
Alaska Airlines
Portland — Seattle
|
8h 53m including layover |
Find flight
from$256 |
|
18:03 — 23:59
|
18:03 — 20:00
UA1015
United Airlines
Boston — Chicago
1h 16m stop
21:16 — 23:59
UA1001
United Airlines
Chicago — Seattle
|
8h 56m including layover |
Find flight
from$236 |
|
18:11 — 00:59
+1 day
|
18:11 — 21:49
UA2400
United Airlines
Boston — San Francisco
1h 6m stop
22:55 — 00:59
UA2400
United Airlines
San Francisco — Seattle
|
9h 48m including layover |
Find flight
from$291 |
|
19:00 — 00:59
+1 day
|
19:00 — 20:46
UA2136
United Airlines
Boston — Washington D.C.
1h 23m stop
22:09 — 00:59
UA2713
United Airlines
Washington D.C. — Seattle
|
8h 59m including layover |
Find flight
from$247 |
|
19:12 — 00:56
+1 day
|
19:12 — 20:58
UA2136
United Airlines
Boston — Washington D.C.
1h 8m stop
22:06 — 00:56
UA716
United Airlines
Washington D.C. — Seattle
|
8h 44m including layover |
Find flight
from$182 |
|
20:19 — 08:04
+1 day
|
20:19 — 23:59
HA4812
Hawaiian Airlines
Boston — San Francisco
6h 1m stop
06:00 — 08:04
HA7023
Hawaiian Airlines
San Francisco — Seattle
|
14h 45m including layover |
Find flight
from$221 |
|
20:19 — 08:04
+1 day
|
20:19 — 23:59
AS355
Alaska Airlines
Boston — San Francisco
6h 1m stop
06:00 — 08:04
AS981
Alaska Airlines
San Francisco — Seattle
|
14h 45m including layover |
Find flight
from$230 |
|
15:18 — 00:59
+1 day
|
15:18 — 17:10
UA1032
United Airlines
Boston — Chicago
1h 10m stop
18:20 — 21:09
UA2179
United Airlines
Chicago — San Francisco
1h 46m stop
22:55 — 00:59
UA2400
United Airlines
San Francisco — Seattle
|
12h 41m including layover |
Find flight
from$472 |
|
21:40 — 15:03
+1 day
|
19:47 — 21:21
NK2523
Spirit Airlines
Boston — Baltimore
6h 47m stop
07:17 — 09:25
NK2015
Spirit Airlines
Baltimore — Las Vegas
4h 8m stop
11:40 — 14:25
NK2327
Spirit Airlines
Las Vegas — Seattle
|
20h 23m including layover |
Find flight
from$154 |
Flight Information
Below we will explain in detail what the flights cost on the destination from Boston to Seattle depends on and how to choose the most interesting flight option for you.
Distance between Boston and Seattle is 4005 miles. Time difference between the cities is 3h. Airplanes depart 05:30 to 21:40 from 4 Boston airports and arrive 05:30 to 21:40 to 3 Seattle airports. Average flight time is 6h 23m.
- The fastest flight 6h 23m
- Average flight time 6h 23m
- The earliest flight 05:30
- The latest flight 21:40
- Distance 2489 ml
The cheapest months to travel to Seattle are june (from 154 $), july (from 182 $), august (from 182 $).
The most expensive months are december (from 655 $), may (from 204 $), august (from 182 $).
What is the lowest airfare Boston to Seattle?
The cheapest plane ticket found by our users is $154. This airfare is for economy class on one-way NK2523 flight by Spirit Airlines for June 26, 2025 which leaves Logan in Boston at 21:40 am and arrives at Seattle Seattle-Tacoma Intl at 15:03.
Popular Airlines on the Route
The flight Boston — Seattle is served by 4 regular airlines and 1 low-cost airline. Most of the flights on this route are operated by Alaska Airlines - 10 departures per week at the price of from $ 230 . And the most expensive tickets are offered by Alaska Airlines airline - from $ 793.
Direct flights
There are 2 nonstop flights on the route. The fastest direct flight is HA4808 by Hawaiian Airlines takes 6h 23m and the cheapest is NK2523 by Spirit Airlines for $246.
- AS - Alaska Airlinesfrom $250Find
- HA - Hawaiian Airlinesfrom $246Find
Connecting Flights
There are 47 flights with layovers on the route. The fastest connecting flight is HA6255 by Hawaiian Airlines takes 7h 48m and the cheapest is NK2523 by Spirit Airlines for $154.
- AS - Alaska Airlinesfrom $230Find
- HA - Hawaiian Airlinesfrom $221Find
- UA - United Airlinesfrom $182Find
- NK - Spirit Airlinesfrom $154Find
Airports
You can fly from Boston to Seattle from 4 airports (Boston City Heliport, Boston RT128 Rail, Boston South Rail, Logan).
Boston airports
- Boston City Heliport-JBCFind
- Boston RT128 Rail-ZRUFind
- Boston South Rail-ZTOFind
- Logan-BOSfrom $154Find
Seattle airports
- Boeing Field International Airport-BFIFind
- Seattle-Tacoma Intl-SEAFind
- Kenmore Air Harbor SPB-LKEFind
Airplanes
There are flights to Seattle from Boston by 4 airlines that use 0 aircraft brands. They range from huge modern airplanes to small-sized.
Top Domestic Destinations from Boston
You may also consider searching for discounted plane tickets to some other popular places from Boston within United States.
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Top International Destinations from Boston
Our state-of-the art metasearch will definitely provide you with the best airfare on international flights. We’re proud to partner with many reliable travel suppliers located outside the US what gives us an opportunity to offer the most competitive prices on far destinations.
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How to book a plane ticket yourself?

- Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find flights»
- Select the best flight that you like. Please, check the airports of departure and arrival. Select the best fare, but pay attention to the following flight details - airports of departure and arrival, flight duration and layovers. Please use filters and sort to find the best flight.
- Click «Buy» when you are ready — our system will redirect you to the site that sells the selected flight ticket.
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