Cheap Flights from Seattle, WA to Boston, MA from $212

One way Round trip

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On Cheapflightsplus.com you will find 1 direct and 30 connecting flights from Seattle to Boston. You can compare airfare deals from 3 airlines and multiple travel sites from $212, book and save on cheap plane tickets and last minute offers. Also check out SEA-BOS flight schedule to find best flight time, convenient departure and arrival airports.

Find One-Way and Round-Trip Seattle to Boston 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: $212 (one-way), $364 (round-trip).

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Best Flights from Seattle to Boston Today

Take a look at the list of non stop flights and flights with layovers from Seattle to Boston with the lowest price of $212. The fastest direct flight takes 5h 14m and the fastest connecting – 7h 24m.

Price	Departure	Arrival	Flight Duration	Airline	Flight
from $224 Find flight	23:30 Seattle Seattle-Tacoma Intl	07:44+1 день Boston Logan	5h 14m	Alaska Airlines	AS536
from $212 Find flight	19:32 Seattle Seattle-Tacoma Intl	07:57+1 день Boston Logan	9h 25m layover 1h 30m - San Francisco	United Airlines	UA737 UA1665
from $212 Find flight	07:15 Seattle Seattle-Tacoma Intl	21:52 Boston Logan	11h 37m layover 3h 39m - San Francisco	United Airlines	UA1403 UA2851
from $269 Find flight	16:59 Seattle Seattle-Tacoma Intl	16:51+1 день Boston Logan	20h 52m layover 13h 11m - San Francisco	Alaska Airlines	AS1132 AS356
from $276 Find flight	15:16 Seattle Seattle-Tacoma Intl	05:49+1 день Boston Logan	11h 33m layover 4h 58m - Denver	United Airlines	UA757 UA2610
from $326 Find flight	11:46 Seattle Seattle-Tacoma Intl	22:24 Boston Logan	7h 38m layover 1h 0m - Chicago	Alaska Airlines	AS352 AS4541
from $387 Find flight	23:20 Seattle Seattle-Tacoma Intl	09:50+1 день Boston Logan	7h 30m layover 1h 6m - Newark	United Airlines	UA341 UA559
from $387 Find flight	19:13 Seattle Seattle-Tacoma Intl	05:49+1 день Boston Logan	7h 36m layover 1h 2m - Denver	United Airlines	UA1387 UA2610
from $387 Find flight	23:59 Seattle Seattle-Tacoma Intl	10:49+1 день Boston Logan	7h 50m layover 1h 37m - Chicago	United Airlines	UA747 UA414
from $387 Find flight	15:24 Seattle Seattle-Tacoma Intl	05:02+1 день Boston Logan	10h 38m layover 2h 43m - San Francisco	United Airlines	UA589 UA1230
from $390 Find flight	21:31 Seattle Seattle-Tacoma Intl	16:51+1 день Boston Logan	16h 20m layover 8h 36m - San Francisco	Alaska Airlines	AS158 AS356
from $453 Find flight	23:20 Seattle Seattle-Tacoma Intl	10:51+1 день Boston Logan	8h 31m layover 2h 4m - Newark	United Airlines	UA341 UA3550
from $453 Find flight	16:58 Seattle Seattle-Tacoma Intl	05:02+1 день Boston Logan	9h 4m layover 1h 15m - San Francisco	United Airlines	UA2482 UA1230
from $272 Find flight	06:00 Seattle Seattle-Tacoma Intl	23:29 Boston Logan	14h 29m layover 4h 13m - Los Angeles 0h 57m - Baltimore	Spirit Airlines	NK801 NK2074 NK2075
from $279 Find flight	18:37 Seattle Seattle-Tacoma Intl	16:00+1 день Boston Logan	18h 23m layover 2h 8m - Las Vegas 7h 42m - Baltimore	Spirit Airlines	NK782 NK1932 NK934
from $518 Find flight	15:04 Seattle Seattle-Tacoma Intl	05:49+1 день Boston Logan	11h 45m layover 1h 17m - Los Angeles 1h 31m - Denver	United Airlines	UA2610 UA2610 UA2610

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*Departure and arrival times - local. Prices indicated for one-way flights. Information updated on March 01, 2025

Flight Schedule Seattle (Washington) to Boston (Massachusetts)

Full flight schedule will help you in detecting at what time planes fly from Seattle to Boston. 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
23:30 — 07:44 +1 day	23:30 — 07:44 AS536 Alaska Airlines Seattle — Boston	5h 14m	Find flight from$224
06:15 — 17:28	06:15 — 14:33 AS280 Alaska Airlines Seattle — Newark 1h 42m stop 16:15 — 17:28 UA1835 United Airlines Newark — Boston	8h 13m including layover	Find flight from$487
07:15 — 21:52	07:05 — 09:25 UA1403 United Airlines Seattle — San Francisco 3h 39m stop 13:00 — 21:43 UA2851 United Airlines San Francisco — Boston	11h 37m including layover	Find flight from$212
07:15 — 05:02 +1 day	07:15 — 09:36 UA1403 United Airlines Seattle — San Francisco 10h 49m stop 20:25 — 05:02 UA1230 United Airlines San Francisco — Boston	18h 47m including layover	Find flight from$457
08:10 — 23:59	08:10 — 16:09 UA1102 United Airlines Seattle — Washington D.C. 6h 15m stop 22:24 — 23:59 UA755 United Airlines Washington D.C. — Boston	12h 49m including layover	Find flight from$517
08:55 — 22:24	08:55 — 15:10 AS408 Alaska Airlines Seattle — Chicago 3h 50m stop 19:00 — 22:24 AS4541 Alaska Airlines Chicago — Boston	10h 29m including layover	Find flight from$601
09:20 — 05:02 +1 day	09:20 — 11:39 UA1960 United Airlines Seattle — San Francisco 8h 46m stop 20:25 — 05:02 UA1230 United Airlines San Francisco — Boston	16h 42m including layover	Find flight from$457
11:46 — 22:24	10:47 — 16:54 AS352 Alaska Airlines Seattle — Chicago 1h stop 18:35 — 22:04 AS4541 Alaska Airlines Chicago — Boston	7h 38m including layover	Find flight from$326
12:37 — 05:02 +1 day	12:37 — 14:55 UA1482 United Airlines Seattle — San Francisco 5h 30m stop 20:25 — 05:02 UA1230 United Airlines San Francisco — Boston	13h 25m including layover	Find flight from$457
12:37 — 07:57 +1 day	12:37 — 14:55 UA1482 United Airlines Seattle — San Francisco 8h 25m stop 23:20 — 07:57 UA1665 United Airlines San Francisco — Boston	16h 20m including layover	Find flight from$457
15:16 — 05:49 +1 day	05:00 — 08:47 UA757 United Airlines Seattle — Denver 4h 58m stop 23:59 — 05:51 UA2610 United Airlines Denver — Boston	11h 33m including layover	Find flight from$276
15:24 — 05:02 +1 day	15:24 — 17:42 UA589 United Airlines Seattle — San Francisco 2h 43m stop 20:25 — 05:02 UA1230 United Airlines San Francisco — Boston	10h 38m including layover	Find flight from$387
16:58 — 05:02 +1 day	16:58 — 19:10 UA2482 United Airlines Seattle — San Francisco 1h 15m stop 20:25 — 05:02 UA1230 United Airlines San Francisco — Boston	9h 4m including layover	Find flight from$453
16:59 — 16:51 +1 day	08:50 — 11:02 AS1132 Alaska Airlines Seattle — San Francisco 13h 11m stop 07:40 — 16:20 AS356 Alaska Airlines San Francisco — Boston	20h 52m including layover	Find flight from$269
19:13 — 05:49 +1 day	19:13 — 22:57 UA1387 United Airlines Seattle — Denver 1h 2m stop 23:59 — 05:49 UA2610 United Airlines Denver — Boston	7h 36m including layover	Find flight from$387
19:32 — 07:57 +1 day	16:23 — 18:40 UA737 United Airlines Seattle — San Francisco 1h 30m stop 23:00 — 07:38 UA1665 United Airlines San Francisco — Boston	9h 25m including layover	Find flight from$212
21:31 — 16:51 +1 day	21:31 — 23:44 AS158 Alaska Airlines Seattle — San Francisco 8h 36m stop 08:20 — 16:51 AS356 Alaska Airlines San Francisco — Boston	16h 20m including layover	Find flight from$390
23:20 — 09:50 +1 day	23:20 — 07:26 UA341 United Airlines Seattle — Newark 1h 6m stop 08:32 — 09:50 UA559 United Airlines Newark — Boston	7h 30m including layover	Find flight from$387
06:00 — 23:29	06:00 — 08:46 NK801 Spirit Airlines Seattle — Los Angeles 4h 13m stop 12:59 — 21:02 NK2074 Spirit Airlines Los Angeles — Baltimore 57m stop 21:59 — 23:29 NK2075 Spirit Airlines Baltimore — Boston	14h 29m including layover	Find flight from$272
18:37 — 16:00 +1 day	18:37 — 21:11 NK782 Spirit Airlines Seattle — Las Vegas 2h 8m stop 23:19 — 06:58 NK1932 Spirit Airlines Las Vegas — Baltimore 7h 42m stop 14:40 — 16:00 NK934 Spirit Airlines Baltimore — Boston	18h 23m including layover	Find flight from$279
18:37 — 15:19 +1 day	18:37 — 21:11 NK782 Spirit Airlines Seattle — Las Vegas 2h 34m stop 23:45 — 07:22 NK1853 Spirit Airlines Las Vegas — Orlando 4h 52m stop 12:14 — 15:19 NK501 Spirit Airlines Orlando — Boston	17h 42m including layover	Find flight from$681

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

*Departure and arrival times - local. Updated on March 1, 2025

Flight Information

Below we will explain in detail what the flights cost on the destination from Seattle to Boston depends on and how to choose the most interesting flight option for you.

Distance between Seattle and Boston is 4005 miles. Time difference between the cities is 3h. Airplanes depart 06:00 to 23:59 from 3 Seattle airports and arrive 06:00 to 23:59 to 4 Boston airports. Average flight time is 5h 14m.

The fastest flight 5h 14m
Average flight time 5h 14m
The earliest flight 06:00
The latest flight 23:59
Distance 2489 ml

The cheapest months to travel to Boston are january (from 212 $), february (from 212 $), november (from 269 $).

The most expensive months are december (from 326 $), november (from 269 $), february (from 212 $).

What is the lowest airfare Seattle to Boston?

The cheapest plane ticket found by our users is $212. This airfare is for economy class on one-way UA737 flight by United Airlines for February 21, 2025 which leaves Seattle-Tacoma Intl in Seattle at 19:32 am and arrives at Boston Logan at 07:57.

Economy class

$212

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Business class

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First class

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Popular Airlines on the Route

The flight Seattle — Boston is served by 3 regular airlines and 1 low-cost airline. Most of the flights on this route are operated by Alaska Airlines - 6 departures per week at the price of from $ 224 . And the most expensive tickets are offered by Spirit Airlines airline - from $ 681.

Direct flights

There are 1 nonstop flights on the route. The fastest direct flight is AS536 by Alaska Airlines takes 5h 14m and the cheapest is UA737 by United Airlines for $224.

AS - Alaska Airlines

from $224

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Connecting Flights

There are 30 flights with layovers on the route. The fastest connecting flight is UA1448 by United Airlines takes 7h 24m and the cheapest is UA737 by United Airlines for $212.

AS - Alaska Airlines

from $269

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UA - United Airlines

from $212

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NK - Spirit Airlines

from $272

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Airports

You can fly from Seattle to Boston from 3 airports (Boeing Field International Airport, Seattle-Tacoma Intl, Kenmore Air Harbor SPB).

Seattle airports

Boeing Field International Airport-BFI

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Seattle-Tacoma Intl-SEA

from $212
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Kenmore Air Harbor SPB-LKE

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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

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Airplanes

There are flights to Boston from Seattle by 3 airlines that use 0 aircraft brands. They range from huge modern airplanes to small-sized.

Top Domestic Destinations from Seattle

You may also consider searching for discounted plane tickets to some other popular places from Seattle within United States.

Seattle — Washington D.C.

from $78

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Seattle — Las Vegas

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Seattle — New York

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Seattle — Chicago

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Seattle — Phoenix

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Seattle — San Diego

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Seattle — Los Angeles

from $53

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Seattle — Denver

from $243

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Seattle — Dallas

from $72

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Seattle — Boston

from $63

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Top International Destinations from Seattle

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.

Seattle — Tokyo

from $77

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Seattle — London

from $70

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Seattle — Vancouver

from $57

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Seattle — Cancun

from $63

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Seattle — Paris

from $66

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Seattle — Toronto

from $64

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Seattle — Calgary

from $76

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Seattle — Mumbai

from $80

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Seattle — Montreal

from $68

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Seattle — Amsterdam

from $64

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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.
To find a plane ticket, please select dates.