Cheap Flights from Boston, MA to Seattle, WA from $145

One way Round trip

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On Cheapflightsplus.com you will find 2 direct and 185 connecting flights from Boston to Seattle. You can compare airfare deals from 5 airlines and multiple travel sites from $145, 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: $145 (one-way), $249 (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 $145. The fastest direct flight takes 6h 37m and the fastest connecting – 8h 19m.

Price	Departure	Arrival	Flight Duration	Airline	Flight
from $305 Find flight	07:00 Boston Logan	10:37 Seattle Seattle-Tacoma Intl	6h 37m	Alaska Airlines	AS401
from $373 Find flight	17:23 Boston Logan	21:00 Seattle Seattle-Tacoma Intl	6h 37m	Alaska Airlines	AS362
from $146 Find flight	11:37 Boston Logan	17:08 Seattle Seattle-Tacoma Intl	8h 31m layover 1h 23m - Minneapolis	Sun Country Airlines	SY252 SY285
from $147 Find flight	16:13 Boston Logan	23:44 Seattle Seattle-Tacoma Intl	10h 31m layover 0h 41m - San Diego	Alaska Airlines	AS389 AS1199
from $166 Find flight	14:52 Boston Logan	21:46 Seattle Seattle-Tacoma Intl	9h 54m layover 2h 3m - Chicago	Alaska Airlines	AS6392 AS421
from $167 Find flight	12:00 Boston Logan	17:51 Seattle Seattle-Tacoma Intl	8h 51m layover 1h 1m - Chicago	Alaska Airlines	AS6761 AS335
from $172 Find flight	08:30 Boston Logan	15:21 Seattle Seattle-Tacoma Intl	9h 51m layover 0h 43m - San Francisco	United Airlines	UA1008 UA2391
from $172 Find flight	05:55 Boston Logan	15:21 Seattle Seattle-Tacoma Intl	12h 26m layover 3h 23m - San Francisco	United Airlines	UA2441 UA2391
from $173 Find flight	15:57 Boston Logan	22:02 Seattle Seattle-Tacoma Intl	9h 5m layover 1h 5m - Newark	United Airlines	UA1977 UA330
from $145 Find flight	08:10 Boston Logan	20:30 Seattle Seattle-Tacoma Intl	15h 20m layover 2h 36m - Chicago 2h 42m - Las Vegas	Spirit Airlines	NK174 NK188 NK413
from $174 Find flight	06:00 Boston Logan	23:10 Seattle Seattle-Tacoma Intl	20h 10m layover 5h 54m - Baltimore 4h 23m - Los Angeles	Spirit Airlines	NK2072 NK1912 NK804
from $178 Find flight	05:45 Boston Logan	15:21 Seattle Seattle-Tacoma Intl	12h 36m layover 0h 56m - Washington D.C. 1h 47m - San Francisco	United Airlines	UA1734 UA1116 UA2391
from $178 Find flight	12:25 Boston Logan	00:50+1 день Seattle Seattle-Tacoma Intl	15h 25m layover 1h 49m - Chicago 3h 45m - San Francisco	United Airlines	UA1732 UA2409 UA1971
from $178 Find flight	10:45 Boston Logan	00:50+1 день Seattle Seattle-Tacoma Intl	17h 5m layover 3h 29m - Chicago 3h 45m - San Francisco	United Airlines	UA1631 UA2409 UA1971
from $181 Find flight	06:00 Boston Logan	16:31 Seattle Seattle-Tacoma Intl	13h 31m layover 1h 5m - Baltimore 1h 47m - Los Angeles	Spirit Airlines	NK1361 NK1365 NK260
from $185 Find flight	11:26 Boston Logan	00:15+1 день Seattle Seattle-Tacoma Intl	15h 49m layover 0h 53m - Miami 2h 56m - Las Vegas	Spirit Airlines	NK2975 NK201 NK181

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*Departure and arrival times - local. Prices indicated for one-way flights. Information updated on November 21, 2024

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
07:00 — 10:37	07:00 — 10:37 AS401 Alaska Airlines Boston — Seattle	6h 37m	Find flight from$305
17:23 — 21:00	17:23 — 21:00 AS362 Alaska Airlines Boston — Seattle	6h 37m	Find flight from$373
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	Find flight from$172
07:05 — 13:55	07:05 — 10:00 UA647 United Airlines Boston — Denver 1h 50m stop 11:50 — 13:55 UA690 United Airlines Denver — Seattle	9h 50m including layover	Find flight from$239
08:30 — 15:21	08:30 — 12:20 UA1008 United Airlines Boston — San Francisco 43m stop 13:03 — 15:21 UA2391 United Airlines San Francisco — Seattle	9h 51m including layover	Find flight from$172
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$190
10:57 — 16:16	10:57 — 12:55 UA267 United Airlines Boston — Chicago 35m stop 13:30 — 16:16 UA1485 United Airlines Chicago — Seattle	8h 19m including layover	Find flight from$190
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$146
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$167
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	Find flight from$190
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	Find flight from$166
15:25 — 21:11	15:17 — 18:07 UA778 United Airlines Boston — Denver 50m stop 19:05 — 21:11 UA299 United Airlines Denver — Seattle	8h 46m including layover	Find flight from$190
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$173
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$147
16:43 — 22:53	16:34 — 18:30 UA2040 United Airlines Boston — Chicago 1h 23m stop 19:55 — 22:46 UA2211 United Airlines Chicago — Seattle	9h 10m including layover	Find flight from$190
17:24 — 09:30 +1 day	16:13 — 19:55 AS389 Alaska Airlines Boston — San Diego 9h 8m stop 06:15 — 09:24 AS1245 Alaska Airlines San Diego — Seattle	19h 6m including layover	Find flight from$214
17:24 — 10:10 +1 day	16:13 — 19:55 AS389 Alaska Airlines Boston — San Diego 9h 48m stop 08:00 — 11:11 AS1154 Alaska Airlines San Diego — Seattle	19h 46m including layover	Find flight from$214
18:39 — 09:18 +1 day	18:39 — 22:39 AS357 Alaska Airlines Boston — San Francisco 8h 21m stop 07:00 — 09:18 AS1013 Alaska Airlines San Francisco — Seattle	17h 39m including layover	Find flight from$203
19:59 — 18:10 +1 day	19:59 — 23:35 AS311 Alaska Airlines Boston — Portland 17h 40m stop 17:15 — 18:10 AS2082 Alaska Airlines Portland — Seattle	25h 11m including layover	Find flight from$214
19:59 — 12:41 +1 day	19:59 — 23:13 AS311 Alaska Airlines Boston — Portland 12h 5m stop 11:49 — 12:55 AS970 Alaska Airlines Portland — Seattle	19h 42m including layover	Find flight from$235
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$178
06:00 — 23:10	06:00 — 07:33 NK2072 Spirit Airlines Boston — Baltimore 5h 54m stop 13:27 — 15:59 NK1912 Spirit Airlines Baltimore — Los Angeles 4h 23m stop 20:22 — 23:10 NK804 Spirit Airlines Los Angeles — Seattle	20h 10m including layover	Find flight from$174
06:00 — 16:31	06:00 — 07:38 NK1361 Spirit Airlines Boston — Baltimore 1h 5m stop 08:43 — 11:49 NK1365 Spirit Airlines Baltimore — Los Angeles 1h 47m stop 13:36 — 16:31 NK260 Spirit Airlines Los Angeles — Seattle	13h 31m including layover	Find flight from$181
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$145
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$185
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$178
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$185
12:25 — 00:50 +1 day	12:25 — 14:21 UA1732 United Airlines Boston — Chicago 1h 49m stop 16:10 — 18:50 UA2409 United Airlines Chicago — San Francisco 3h 45m stop 22:35 — 00:50 UA1971 United Airlines San Francisco — Seattle	15h 25m including layover	Find flight from$178
18:39 — 10:59 +1 day	18:39 — 22:39 AS357 Alaska Airlines Boston — San Francisco 7h 21m stop 06:00 — 07:29 AS3423 Alaska Airlines San Francisco — Los Angeles 31m stop 08:00 — 10:59 AS1179 Alaska Airlines Los Angeles — Seattle	19h 20m including layover	Find flight from$229
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$181

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

*Departure and arrival times - local. Updated on November 21, 2024

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 21:44 from 4 Boston airports and arrive 05:00 to 21:44 to 3 Seattle airports. Average flight time is 6h 37m.

The fastest flight 6h 37m
Average flight time 6h 37m
The earliest flight 05:00
The latest flight 21:44
Distance 2489 ml

The cheapest months to travel to Seattle are december (from 145 $), november (from 172 $), february (from 174 $).

The most expensive months are january (from 181 $), february (from 174 $), november (from 172 $).

What is the lowest airfare Boston to Seattle?

The cheapest plane ticket found by our users is $145. This airfare is for economy class on one-way NK174 flight by Spirit Airlines for December 3, 2024 which leaves Logan in Boston at 08:10 am and arrives at Seattle Seattle-Tacoma Intl at 20:30.

Economy class

$145

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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 5 regular airlines and 2 low-cost airlines. Most of the flights on this route are operated by Alaska Airlines - 49 departures per week at the price of from $ 147 . And the most expensive tickets are offered by Turkish Airlines airline - from $ 1915.

Direct flights

There are 2 nonstop flights on the route. The fastest direct flight is AS401 by Alaska Airlines takes 6h 37m and the cheapest is NK174 by Spirit Airlines for $305.

AS - Alaska Airlines

from $305

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Connecting Flights

There are 185 flights with layovers on the route. The fastest connecting flight is UA267 by United Airlines takes 8h 19m and the cheapest is NK174 by Spirit Airlines for $145.

AS - Alaska Airlines

from $147

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SY - Sun Country Airlines

from $146

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UA - United Airlines

from $172

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NK - Spirit Airlines

from $145

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TK - Turkish Airlines

from $1915

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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 $145
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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 5 airlines that use 1 aircraft brands. They range from huge modern airplanes to small-sized.

Boeing 737 MAX 9

from $495

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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 — Orlando

from $67

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Boston — Newark

from $73

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Boston — Minneapolis

from $54

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Boston — Chicago

from $59

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Boston — Los Angeles

from $62

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Boston — Las Vegas

from $63

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Boston — San Francisco

from $61

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Boston — New York

from $57

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Boston — Miami

from $56

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Boston — Louisville

from $69

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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 — Rome

from $77

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Boston — London

from $76

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Boston — Zurich

from $68

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Boston — Paris

from $76

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Boston — Manchester

from $68

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Boston — Dublin

from $54

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Boston — Athens

from $59

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Boston — Lisbon

from $66

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Boston — Barcelona

from $67

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Boston — Munich

from $74

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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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