Cheap Flights from Boston, MA to Seattle, WA from $149

Return flight: Seattle – Boston

On Cheapflightsplus.com you will find 9 direct and 632 connecting flights from Boston to Seattle. You can compare airfare deals from 13 airlines and multiple travel sites from $149, 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

To find the cheapest one way airline ticket select the date with the lowest price on the calendar below and click «Find Flights». To search for round-trip flight deals click on the link «Check prices for return flights» and select the date of the return flight. Cheapest flights in November: $149 (one-way), $256 (round-trip).
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Full flight schedule will help you in detecting at what time planes fly from Boston to Seattle. You can also specify the concrete flights and airlines on the route and how long the flight actually is. Use the calendar for today, tomorrow or other specific date as some flights are available only on certain days of the week.
Departure Arrival Flight Details Flight Duration Price
07:00 — 10:30
07:00 — 10:30 B6497 JetBlue
Boston — Seattle
6h 30m
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from$149
07:00 — 10:21
07:00 — 10:21 AS459 Alaska Airlines
Boston — Seattle
6h 21m
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from$150
07:00 — 10:45
07:00 — 10:45 DL384 Delta Air Lines Inc.
Boston — Seattle
6h 45m
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from$167
07:00 — 10:37
07:00 — 10:37 AS401 Alaska Airlines
Boston — Seattle
6h 37m
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from$340
07:00 — 10:21
07:00 — 10:21 AA9302 American Airlines
Boston — Seattle
6h 21m
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from$400
17:23 — 21:00
17:23 — 21:00 AS362 Alaska Airlines
Boston — Seattle
6h 37m
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from$416
17:25 — 20:44
17:25 — 20:44 AS364 Alaska Airlines
Boston — Seattle
6h 19m
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from$184
18:40 — 22:25
18:40 — 22:25 DL324 Delta Air Lines Inc.
Boston — Seattle
6h 45m
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from$167
19:19 — 22:39
19:19 — 22:39 AS537 Alaska Airlines
Boston — Seattle
6h 20m
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from$150
05:55 — 15:21
05:55 — 09:40 UA2441 United Airlines
Boston — San Francisco
3h 23m stop
13:03 — 15:21 UA2391 United Airlines
San Francisco — Seattle
12h 26m
including layover
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from$192
06:00 — 12:53
06:00 — 09:45 UA2441 United Airlines
Boston — San Francisco
50m stop
10:35 — 12:53 UA2315 United Airlines
San Francisco — Seattle
9h 53m
including layover
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from$152
06:00 — 15:18
06:00 — 09:45 UA2441 United Airlines
Boston — San Francisco
3h 15m stop
13:00 — 15:18 UA2650 United Airlines
San Francisco — Seattle
12h 18m
including layover
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from$152
08:00 — 15:18
08:00 — 11:50 UA1008 United Airlines
Boston — San Francisco
1h 10m stop
13:00 — 15:18 UA2650 United Airlines
San Francisco — Seattle
10h 18m
including layover
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from$152
09:30 — 16:16
09:30 — 11:28 UA216 United Airlines
Boston — Chicago
2h 2m stop
13:30 — 16:16 UA1485 United Airlines
Chicago — Seattle
9h 46m
including layover
Find flight
from$212
11:37 — 17:08
11:30 — 13:44 SY252 Sun Country Airlines
Boston — Minneapolis
1h 23m stop
15:34 — 17:28 SY285 Sun Country Airlines
Minneapolis — Seattle
8h 31m
including layover
Find flight
from$163
12:00 — 17:51
08:45 — 10:50 AS6761 Alaska Airlines
Boston — Chicago
1h 1m stop
13:07 — 15:55 AS335 Alaska Airlines
Chicago — Seattle
8h 51m
including layover
Find flight
from$187
13:30 — 21:07
13:30 — 17:19 UA1187 United Airlines
Boston — San Francisco
1h 31m stop
18:50 — 21:07 UA2019 United Airlines
San Francisco — Seattle
10h 37m
including layover
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from$152
14:00 — 22:00
13:53 — 15:30 UA2454 United Airlines
Boston — Newark
3h 15m stop
19:10 — 22:37 UA2044 United Airlines
Newark — Seattle
11h
including layover
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from$212
14:52 — 21:46
14:26 — 16:28 AS6392 Alaska Airlines
Boston — Chicago
2h 3m stop
19:14 — 22:00 AS421 Alaska Airlines
Chicago — Seattle
9h 54m
including layover
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from$186
15:57 — 22:02
15:57 — 17:30 UA1977 United Airlines
Boston — Newark
1h 5m stop
18:35 — 22:02 UA330 United Airlines
Newark — Seattle
9h 5m
including layover
Find flight
from$193
16:13 — 23:44
16:13 — 19:55 AS389 Alaska Airlines
Boston — San Diego
41m stop
20:36 — 23:44 AS1199 Alaska Airlines
San Diego — Seattle
10h 31m
including layover
Find flight
from$164
16:55 — 23:09
16:48 — 19:37 UA800 United Airlines
Boston — Denver
1h 24m stop
21:05 — 23:11 UA2651 United Airlines
Denver — Seattle
9h 14m
including layover
Find flight
from$211
18:30 — 08:20
+1 day
18:30 — 22:08 AS357 Alaska Airlines
Boston — San Francisco
7h 52m stop
06:00 — 08:20 AS1043 Alaska Airlines
San Francisco — Seattle
16h 50m
including layover
Find flight
from$172
19:30 — 07:15
+1 day
19:30 — 22:23 B6393 JetBlue
Boston — Denver
6h 41m stop
05:04 — 07:15 F91175 Frontier Airlines
Denver — Seattle
14h 45m
including layover
Find flight
from$160
05:45 — 15:21
05:45 — 07:29 UA1734 United Airlines
Boston — Washington D.C.
56m stop
08:25 — 11:16 UA1116 United Airlines
Washington D.C. — San Francisco
1h 47m stop
13:03 — 15:21 UA2391 United Airlines
San Francisco — Seattle
12h 36m
including layover
Find flight
from$198
08:10 — 20:30
08:10 — 10:21 NK174 Spirit Airlines
Boston — Chicago
2h 36m stop
12:57 — 15:02 NK188 Spirit Airlines
Chicago — Las Vegas
2h 42m stop
17:44 — 20:30 NK413 Spirit Airlines
Las Vegas — Seattle
15h 20m
including layover
Find flight
from$162
09:25 — 00:15
+1 day
09:25 — 13:03 NK1370 Spirit Airlines
Boston — Tampa
3h 44m stop
16:47 — 19:01 NK184 Spirit Airlines
Tampa — Las Vegas
2h 27m stop
21:28 — 00:15 NK181 Spirit Airlines
Las Vegas — Seattle
17h 50m
including layover
Find flight
from$206
10:05 — 00:11
+1 day
10:05 — 13:14 NK2062 Spirit Airlines
Boston — New Orleans
4h 30m stop
17:44 — 20:03 NK388 Spirit Airlines
New Orleans — Los Angeles
1h 10m stop
21:13 — 00:11 NK1490 Spirit Airlines
Los Angeles — Seattle
17h 6m
including layover
Find flight
from$190
10:45 — 00:50
+1 day
10:45 — 12:41 UA1631 United Airlines
Boston — Chicago
3h 29m stop
16:10 — 18:50 UA2409 United Airlines
Chicago — San Francisco
3h 45m stop
22:35 — 00:50 UA1971 United Airlines
San Francisco — Seattle
17h 5m
including layover
Find flight
from$198
11:26 — 00:15
+1 day
11:26 — 15:03 NK2975 Spirit Airlines
Boston — Miami
53m stop
15:56 — 18:32 NK201 Spirit Airlines
Miami — Las Vegas
2h 56m stop
21:28 — 00:15 NK181 Spirit Airlines
Las Vegas — Seattle
15h 49m
including layover
Find flight
from$206
12:17 — 07:15
+1 day
12:17 — 13:53 F93011 Frontier Airlines
Boston — Philadelphia
5h 46m stop
19:39 — 22:02 F93339 Frontier Airlines
Philadelphia — Denver
7h 2m stop
05:04 — 07:15 F91175 Frontier Airlines
Denver — Seattle
21h 58m
including layover
Find flight
from$165
13:00 — 07:15
+1 day
13:00 — 15:36 AA1445 American Airlines
Boston — Charlotte
1h 56m stop
17:32 — 19:10 AA1636 American Airlines
Charlotte — Denver
9h 54m stop
05:04 — 07:15 F91175 Frontier Airlines
Denver — Seattle
21h 15m
including layover
Find flight
from$162
15:06 — 07:15
+1 day
15:06 — 16:29 B61117 JetBlue
Boston — New York
4h 30m stop
20:59 — 23:50 B697 JetBlue
New York — Denver
5h 14m stop
05:04 — 07:15 F91175 Frontier Airlines
Denver — Seattle
19h 9m
including layover
Find flight
from$169
17:35 — 07:15
+1 day
17:35 — 18:59 B6517 JetBlue
Boston — New York
2h stop
20:59 — 23:50 B697 JetBlue
New York — Denver
5h 14m stop
05:04 — 07:15 F91175 Frontier Airlines
Denver — Seattle
16h 40m
including layover
Find flight
from$162
17:59 — 07:15
+1 day
17:59 — 19:31 AA1408 American Airlines
Boston — Philadelphia
1h 9m stop
20:40 — 23:02 AA3174 American Airlines
Philadelphia — Denver
6h 2m stop
05:04 — 07:15 F91175 Frontier Airlines
Denver — Seattle
16h 16m
including layover
Find flight
from$162
21:44 — 20:26
+1 day
21:44 — 23:23 NK2072 Spirit Airlines
Boston — Baltimore
10h 23m stop
08:00 — 10:28 NK2377 Spirit Airlines
Baltimore — Las Vegas
5h 21m stop
17:36 — 20:26 NK1455 Spirit Airlines
Las Vegas — Seattle
25h 42m
including layover
Find flight
from$202
*Departure and arrival times - local. Updated on April 1, 2025

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 05:00 to 21:57 from 4 Boston airports and arrive 05:00 to 21:57 to 3 Seattle airports. Average flight time is 6h 30m.

  • The fastest flight 6h 19m
  • Average flight time 6h 30m
  • The earliest flight 05:00
  • The latest flight 21:57
  • Distance 2489 ml

The cheapest months to travel to Seattle are november (from 149 $), december (from 162 $), february (from 194 $).

The most expensive months are january (from 202 $), february (from 194 $), december (from 162 $).

What is the lowest airfare Boston to Seattle?

The cheapest plane ticket found by our users is $149. This airfare is for economy class on one-way B6497 flight by JetBlue for November 12, 2024 which leaves Logan in Boston at 07:00 am and arrives at Seattle Seattle-Tacoma Intl at 10:30.

Economy class
$149
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Business class
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First class
?
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Popular Airlines on the Route

The flight Boston — Seattle is served by 13 regular airlines and 6 low-cost airlines. Most of the flights on this route are operated by Delta Air Lines Inc. - 85 departures per week at the price of from $ 167 . And the most expensive tickets are offered by SWISS International Air Lines airline - from $ 7139.

Direct flights

There are 9 nonstop flights on the route. The fastest direct flight is AS364 by Alaska Airlines takes 6h 19m and the cheapest is B6497 by JetBlue for $149.

See more direct flights

Connecting Flights

There are 632 flights with layovers on the route. The fastest connecting flight is DL1103 by Delta Air Lines Inc. takes 8h 8m and the cheapest is B6497 by JetBlue for $152.

  • from $244
    Find
  • from $160
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  • AA - American Airlines
    from $162
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  • SY - Sun Country Airlines
    from $163
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  • UA - United Airlines
    from $152
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  • LX - SWISS International Air Lines
    from $6971
    Find
  • AS - Alaska Airlines
    from $164
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  • F9 - Frontier Airlines
    from $165
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  • PD - Porter Airlines
    from $501
    Find
  • TK - Turkish Airlines
    from $2123
    Find
  • HA - Hawaiian Airlines
    from $565
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  • NK - Spirit Airlines
    from $162
    Find
See more connecting flights

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-JBC
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  • Boston RT128 Rail-ZRU
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  • Boston South Rail-ZTO
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  • Logan-BOS
    from $149
    Find

Seattle airports

  • Boeing Field International Airport-BFI
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  • Seattle-Tacoma Intl-SEA
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  • Kenmore Air Harbor SPB-LKE
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How to book a plane ticket yourself?

How to book an air 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.
  • Fill in all passenger and payment information — passport and contact information, please double check all passengers’ names and make a payment for your itinerary.
  • That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.

    To find a plane ticket, please select dates.

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