Cheap Flights from Boston, MA to Seattle, WA from $154

One way Round trip

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On Cheapflightsplus.com you will find 2 direct and 21 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

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: $154 (one-way), $264 (round-trip).

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Best Flights from Boston to Seattle Today

Take a look at the list of non stop flights and flights with layovers from Boston to Seattle with the lowest price of $154. The fastest direct flight takes 6h 23m and the fastest connecting – 7h 48m.

Price	Departure	Arrival	Flight Duration	Airline	Flight
from $203 Find flight	16:25 Boston Logan	19:48 Seattle Seattle-Tacoma Intl	6h 23m	Hawaiian Airlines	HA4808
from $205 Find flight	16:25 Boston Logan	19:48 Seattle Seattle-Tacoma Intl	6h 23m	Alaska Airlines	AS304
from $182 Find flight	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 Find flight	16:57 Boston Logan	22:59 Seattle Seattle-Tacoma Intl	9h 2m layover 1h 14m - Denver	United Airlines	UA800 UA2651
from $182 Find flight	14:00 Boston Logan	20:56 Seattle Seattle-Tacoma Intl	9h 56m layover 1h 9m - San Francisco	United Airlines	UA1074 UA2019
from $182 Find flight	16:27 Boston Logan	23:59 Seattle Seattle-Tacoma Intl	10h 32m layover 2h 56m - Chicago	United Airlines	UA2040 UA1001
from $221 Find flight	20:19 Boston Logan	08:04+1 день Seattle Seattle-Tacoma Intl	14h 45m layover 6h 1m - San Francisco	Hawaiian Airlines	HA4812 HA7023
from $236 Find flight	18:03 Boston Logan	23:59 Seattle Seattle-Tacoma Intl	8h 56m layover 1h 16m - Chicago	United Airlines	UA1015 UA1001
from $248 Find flight	17:06 Boston Logan	21:54 Seattle Seattle-Tacoma Intl	7h 48m layover 0h 35m - Portland	Hawaiian Airlines	HA6255 HA6567
from $256 Find flight	17:06 Boston Logan	22:59 Seattle Seattle-Tacoma Intl	8h 53m layover 1h 35m - Portland	Alaska Airlines	AS1319 AS3408
from $291 Find flight	18:11 Boston Logan	00:59+1 день Seattle Seattle-Tacoma Intl	9h 48m layover 1h 6m - San Francisco	United Airlines	UA2400 UA2400
from $438 Find flight	10:40 Boston Logan	16:20 Seattle Seattle-Tacoma Intl	8h 40m layover 1h 9m - Chicago	United Airlines	UA1298 UA1485
from $467 Find flight	13:30 Boston Logan	21:17 Seattle Seattle-Tacoma Intl	10h 47m layover 3h 2m - Newark	United Airlines	UA2454 UA2044
from $467 Find flight	13:22 Boston Logan	21:23 Seattle Seattle-Tacoma Intl	11h 1m layover 3h 30m - Denver	United Airlines	UA497 UA299
from $154 Find flight	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 Find flight	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

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*Departure and arrival times - local. Prices indicated for one-way flights. Information updated on August 22, 2025

Flight Schedule Boston (Massachusetts) to Seattle (Washington)

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	Flight Details	Flight Duration	Price
16:25 — 19:48	16:25 — 19:48 HA4808 Hawaiian Airlines Boston — Seattle	6h 23m	Find flight from$203
16:25 — 19:48	16:25 — 19:48 AS304 Alaska Airlines Boston — Seattle	6h 23m	Find flight from$205
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
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
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
17:06 — 06:25 +1 day	17:06 — 20:24 AS1319 Alaska Airlines Boston — Portland 9h 11m stop 05:35 — 06:25 X43109 Vanair Limited Portland — Seattle	16h 19m including layover	Find flight from$790
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
19:12 — 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 — 09:05 +1 day	20:19 — 23:59 HA4812 Hawaiian Airlines Boston — San Francisco 7h 1m stop 07:00 — 09:05 HA7024 Hawaiian Airlines San Francisco — Seattle	15h 46m including layover	Find flight from$295
12:29 — 22:39	12:29 — 14:09 UA1365 United Airlines Boston — Washington D.C. 3h 9m stop 17:18 — 18:45 UA2497 United Airlines Washington D.C. — Chicago 1h 14m stop 19:59 — 22:39 UA2211 United Airlines Chicago — Seattle	13h 10m including layover	Find flight from$570
12:29 — 22:39	12:29 — 14:09 UA1365 United Airlines Boston — Washington D.C. 1h 30m stop 15:39 — 16:52 UA1057 United Airlines Washington D.C. — Chicago 3h 7m stop 19:59 — 22:39 UA2211 United Airlines Chicago — Seattle	13h 10m including layover	Find flight from$770
14:46 — 23:59	14:46 — 16:30 UA539 United Airlines Boston — Washington D.C. 48m stop 17:18 — 18:45 UA2497 United Airlines Washington D.C. — Chicago 2h 31m stop 21:16 — 23:59 UA1001 United Airlines Chicago — Seattle	12h 13m including layover	Find flight from$472
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

Departure	Arrival	Flight Details	Flight Time	Price
		stop stop	including layover	Find flight from$

*Departure and arrival times - local. Updated on August 22, 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 10:40 to 21:40 from 4 Boston airports and arrive 10:40 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 10:40
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 may (from 249 $), august (from 182 $), july (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.

Economy class

$154

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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 4 regular airlines and 1 low-cost airline. Most of the flights on this route are operated by Alaska Airlines - 3 departures per week at the price of from $ 205 . And the most expensive tickets are offered by Alaska Airlines airline - from $ 790.

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 $203.

AS - Alaska Airlines

from $205

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HA - Hawaiian Airlines

from $203

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Connecting Flights

There are 21 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 Airlines

from $256

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HA - Hawaiian Airlines

from $221

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UA - United Airlines

from $182

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NK - Spirit Airlines

from $154

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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 $154
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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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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.

Boston — New York

from $57

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Boston — Orlando

from $67

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Boston — Chicago

from $59

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Boston — Miami

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Boston — Washington D.C.

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Boston — Denver

from $65

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Boston — Nashville

from $71

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Boston — Tampa

from $63

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Boston — Las Vegas

from $63

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Boston — Seattle

from $60

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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.

Boston — London

from $76

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Boston — Paris

from $76

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Boston — Toronto

from $54

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Boston — Dublin

from $54

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Boston — Aruba

from $69

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Boston — Rome

from $77

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Boston — Cancun

from $78

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Boston — Lisbon

from $66

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Boston — Montreal

from $77

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Boston — Barcelona

from $67

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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.
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.
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