Cheap Flights from Seattle, WA to Boston, MA from $125

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On Cheapflightsplus.com you will find 9 direct and 392 connecting flights from Seattle to Boston. You can compare airfare deals from 6 airlines and multiple travel sites from $125, 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: $125 (one-way), $214 (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 $125. The fastest direct flight takes 5h 16m and the fastest connecting – 7h.

Price	Departure	Arrival	Flight Duration	Airline	Flight
from $125 Find flight	15:43 Seattle Seattle-Tacoma Intl	23:59 Boston Logan	5h 16m	Hawaiian Airlines	HA6627
from $125 Find flight	23:40 Seattle Seattle-Tacoma Intl	08:00+1 день Boston Logan	5h 20m	Hawaiian Airlines	HA6628
from $129 Find flight	15:43 Seattle Seattle-Tacoma Intl	23:59 Boston Logan	5h 16m	Alaska Airlines	AS460
from $130 Find flight	23:40 Seattle Seattle-Tacoma Intl	08:00+1 день Boston Logan	5h 20m	Alaska Airlines	AS536
from $154 Find flight	10:58 Seattle Seattle-Tacoma Intl	19:19 Boston Logan	5h 21m	Hawaiian Airlines	HA6629
from $159 Find flight	10:26 Seattle Seattle-Tacoma Intl	18:59 Boston Logan	5h 33m	Alaska Airlines	AS506
from $205 Find flight	10:58 Seattle Seattle-Tacoma Intl	19:19 Boston Logan	5h 21m	Alaska Airlines	AS818
from $241 Find flight	08:21 Seattle Seattle-Tacoma Intl	16:45 Boston Logan	5h 24m	Hawaiian Airlines	HA6626
from $246 Find flight	08:21 Seattle Seattle-Tacoma Intl	16:45 Boston Logan	5h 24m	Alaska Airlines	AS306
from $131 Find flight	18:55 Seattle Seattle-Tacoma Intl	07:30+1 день Boston Logan	9h 35m layover 0h 58m - San Diego	Hawaiian Airlines	HA6880 HA6497
from $132 Find flight	18:59 Seattle Seattle-Tacoma Intl	07:40+1 день Boston Logan	9h 41m layover 1h 0m - San Diego	Hawaiian Airlines	HA6608 HA6342
from $140 Find flight	18:55 Seattle Seattle-Tacoma Intl	07:30+1 день Boston Logan	9h 35m layover 0h 58m - San Diego	Alaska Airlines	AS939 AS259
from $141 Find flight	18:59 Seattle Seattle-Tacoma Intl	07:40+1 день Boston Logan	9h 41m layover 1h 0m - San Diego	Alaska Airlines	AS206 AS366
from $153 Find flight	17:59 Seattle Seattle-Tacoma Intl	07:40+1 день Boston Logan	10h 41m layover 2h 0m - San Diego	Hawaiian Airlines	HA6882 HA6342
from $168 Find flight	15:58 Seattle Seattle-Tacoma Intl	08:39+1 день Boston Logan	13h 41m layover 4h 29m - Las Vegas 1h 15m - Detroit	Spirit Airlines	NK2328 NK2144 NK2149
from $184 Find flight	12:30 Seattle Seattle-Tacoma Intl	09:12+1 день Boston Logan	17h 42m layover 2h 6m - Denver 7h 47m - Fletcher	Sun Country Airlines	SY1698 G4226 G4228

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*Departure and arrival times - local. Prices indicated for one-way flights. Information updated on August 22, 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
08:21 — 16:45	08:21 — 16:45 HA6626 Hawaiian Airlines Seattle — Boston	5h 24m	Find flight from$241
08:21 — 16:45	08:21 — 16:45 AS306 Alaska Airlines Seattle — Boston	5h 24m	Find flight from$246
10:26 — 18:59	10:26 — 18:59 AS506 Alaska Airlines Seattle — Boston	5h 33m	Find flight from$159
10:58 — 19:19	10:58 — 19:19 HA6629 Hawaiian Airlines Seattle — Boston	5h 21m	Find flight from$154
10:58 — 19:19	10:58 — 19:19 AS818 Alaska Airlines Seattle — Boston	5h 21m	Find flight from$205
15:43 — 23:59	15:43 — 23:59 HA6627 Hawaiian Airlines Seattle — Boston	5h 16m	Find flight from$125
15:43 — 23:59	15:43 — 23:59 AS460 Alaska Airlines Seattle — Boston	5h 16m	Find flight from$129
23:40 — 08:00 +1 day	23:40 — 08:00 HA6628 Hawaiian Airlines Seattle — Boston	5h 20m	Find flight from$125
23:40 — 08:00 +1 day	23:40 — 08:00 AS536 Alaska Airlines Seattle — Boston	5h 20m	Find flight from$130
00:20 — 10:54	00:20 — 06:28 UA1832 United Airlines Seattle — Chicago 59m stop 07:27 — 10:54 UA2067 United Airlines Chicago — Boston	7h 34m including layover	Find flight from$181
00:20 — 12:50	00:20 — 06:28 UA1832 United Airlines Seattle — Chicago 2h 47m stop 09:15 — 12:50 UA721 United Airlines Chicago — Boston	9h 30m including layover	Find flight from$183
05:10 — 19:53	05:10 — 07:22 UA2166 United Airlines Seattle — San Francisco 3h 40m stop 11:02 — 19:53 UA1116 United Airlines San Francisco — Boston	11h 43m including layover	Find flight from$181
07:00 — 17:46	07:00 — 13:15 UA2618 United Airlines Seattle — Chicago 1h stop 14:15 — 17:46 UA1693 United Airlines Chicago — Boston	7h 46m including layover	Find flight from$181
07:00 — 18:03	07:00 — 13:14 UA1617 United Airlines Seattle — Chicago 1h 11m stop 14:25 — 18:03 UA580 United Airlines Chicago — Boston	8h 3m including layover	Find flight from$181
08:00 — 19:20	08:00 — 16:11 UA2398 United Airlines Seattle — Washington D.C. 1h 22m stop 17:33 — 19:20 UA688 United Airlines Washington D.C. — Boston	8h 20m including layover	Find flight from$181
08:57 — 19:53	08:57 — 12:43 UA1359 United Airlines Seattle — Denver 1h 7m stop 13:50 — 19:53 UA1292 United Airlines Denver — Boston	7h 56m including layover	Find flight from$181
09:45 — 21:44	09:45 — 12:01 UA1470 United Airlines Seattle — San Francisco 59m stop 13:15 — 21:59 UA1372 United Airlines San Francisco — Boston	8h 59m including layover	Find flight from$181
11:13 — 22:00	11:13 — 14:59 UA1061 United Airlines Seattle — Denver 1h 3m stop 16:02 — 22:00 UA1027 United Airlines Denver — Boston	7h 47m including layover	Find flight from$181
11:13 — 23:53	11:13 — 14:59 UA1061 United Airlines Seattle — Denver 2h 51m stop 17:50 — 23:53 UA1218 United Airlines Denver — Boston	9h 40m including layover	Find flight from$181
12:43 — 23:46	12:43 — 16:30 UA1417 United Airlines Seattle — Denver 1h 13m stop 17:43 — 23:46 UA1691 United Airlines Denver — Boston	8h 3m including layover	Find flight from$183
13:00 — 23:59	12:47 — 20:45 UA2275 United Airlines Seattle — Washington D.C. 1h 21m stop 22:22 — 23:59 UA755 United Airlines Washington D.C. — Boston	7h 59m including layover	Find flight from$170
13:55 — 00:52 +1 day	13:55 — 20:10 UA1298 United Airlines Seattle — Chicago 1h 12m stop 21:22 — 00:52 UA1779 United Airlines Chicago — Boston	7h 57m including layover	Find flight from$181
17:59 — 07:40 +1 day	17:59 — 20:45 HA6882 Hawaiian Airlines Seattle — San Diego 2h stop 22:45 — 07:40 HA6342 Hawaiian Airlines San Diego — Boston	10h 41m including layover	Find flight from$153
17:59 — 07:40 +1 day	17:59 — 20:45 AS1098 Alaska Airlines Seattle — San Diego 2h stop 22:45 — 07:40 AS366 Alaska Airlines San Diego — Boston	10h 41m including layover	Find flight from$163
18:55 — 07:30 +1 day	18:55 — 21:47 HA6880 Hawaiian Airlines Seattle — San Diego 58m stop 22:45 — 07:30 HA6497 Hawaiian Airlines San Diego — Boston	9h 35m including layover	Find flight from$131
18:59 — 07:40 +1 day	18:59 — 21:45 HA6608 Hawaiian Airlines Seattle — San Diego 1h stop 22:45 — 07:40 HA6342 Hawaiian Airlines San Diego — Boston	9h 41m including layover	Find flight from$132
19:02 — 06:01 +1 day	19:00 — 22:51 UA757 United Airlines Seattle — Denver 1h 6m stop 23:59 — 06:01 UA297 United Airlines Denver — Boston	7h 59m including layover	Find flight from$182
19:34 — 08:18 +1 day	19:34 — 21:50 UA737 United Airlines Seattle — San Francisco 1h 40m stop 23:30 — 08:18 UA1665 United Airlines San Francisco — Boston	9h 44m including layover	Find flight from$182
22:15 — 10:21 +1 day	22:15 — 06:12 UA2402 United Airlines Seattle — Washington D.C. 2h 28m stop 08:40 — 10:21 UA641 United Airlines Washington D.C. — Boston	9h 6m including layover	Find flight from$183
22:50 — 09:09 +1 day	22:50 — 07:06 UA341 United Airlines Seattle — Newark 49m stop 07:55 — 09:09 UA1127 United Airlines Newark — Boston	7h 19m including layover	Find flight from$181
06:00 — 08:41 +1 day	06:00 — 08:31 NK2626 Spirit Airlines Seattle — Las Vegas 13h 58m stop 22:29 — 05:23 NK2144 Spirit Airlines Las Vegas — Detroit 1h 22m stop 06:45 — 08:41 NK2149 Spirit Airlines Detroit — Boston	23h 41m including layover	Find flight from$168
06:00 — 09:09 +1 day	06:00 — 08:31 NK2626 Spirit Airlines Seattle — Las Vegas 13h 23m stop 21:54 — 05:25 NK2297 Spirit Airlines Las Vegas — Orlando 42m stop 06:07 — 09:09 NK2090 Spirit Airlines Orlando — Boston	24h 9m including layover	Find flight from$168
12:30 — 09:12 +1 day	12:30 — 16:15 SY1698 Sun Country Airlines Seattle — Denver 2h 6m stop 18:21 — 23:13 G4226 Allegiant Air Denver — Fletcher 7h 47m stop 07:00 — 09:12 G4228 Allegiant Air Fletcher — Boston	17h 42m including layover	Find flight from$184

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 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 00:17 to 23:59 from 3 Seattle airports and arrive 00:17 to 23:59 to 4 Boston airports. Average flight time is 5h 21m.

The fastest flight 5h 16m
Average flight time 5h 21m
The earliest flight 00:17
The latest flight 23:59
Distance 2489 ml

The cheapest months to travel to Boston are may (from 125 $), july (from 125 $), june (from 126 $).

The most expensive months are december (from 309 $), september (from 181 $), october (from 181 $).

What is the lowest airfare Seattle to Boston?

The cheapest plane ticket found by our users is $125. This airfare is for economy class on one-way HA6627 flight by Hawaiian Airlines for July 5, 2025 which leaves Seattle-Tacoma Intl in Seattle at 15:43 am and arrives at Boston Logan at 23:59.

Economy class

$125

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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 6 regular airlines and 2 low-cost airlines. Most of the flights on this route are operated by Alaska Airlines - 61 departures per week at the price of from $ 129 . And the most expensive tickets are offered by Alaska Airlines airline - from $ 5586.

Direct flights

There are 9 nonstop flights on the route. The fastest direct flight is HA6627 by Hawaiian Airlines takes 5h 16m and the cheapest is HA6627 by Hawaiian Airlines for $125.

AS - Alaska Airlines

from $129

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HA - Hawaiian Airlines

from $125

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Connecting Flights

There are 392 flights with layovers on the route. The fastest connecting flight is HA6833 by Hawaiian Airlines takes 7h and the cheapest is HA6627 by Hawaiian Airlines for $131.

AS - Alaska Airlines

from $140

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SY - Sun Country Airlines

from $184

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TK - Turkish Airlines

from $2801

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HA - Hawaiian Airlines

from $131

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UA - United Airlines

from $170

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NK - Spirit Airlines

from $168

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See more connecting flights

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 $125
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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 6 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

from $62

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Seattle — New York

from $180

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Seattle — Chicago

from $73

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Seattle — Phoenix

from $67

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Seattle — San Diego

from $74

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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.
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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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