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

One way Round trip

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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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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 $149. The fastest direct flight takes 6h 19m and the fastest connecting – 8h 8m.

Price	Departure	Arrival	Flight Duration	Airline	Flight
from $149 Find flight	07:00 Boston Logan	10:30 Seattle Seattle-Tacoma Intl	6h 30m	JetBlue	B6497
from $150 Find flight	19:19 Boston Logan	22:39 Seattle Seattle-Tacoma Intl	6h 20m	Alaska Airlines	AS537
from $150 Find flight	07:00 Boston Logan	10:21 Seattle Seattle-Tacoma Intl	6h 21m	Alaska Airlines	AS459
from $167 Find flight	07:00 Boston Logan	10:45 Seattle Seattle-Tacoma Intl	6h 45m	Delta Air Lines Inc.	DL384
from $184 Find flight	17:25 Boston Logan	20:44 Seattle Seattle-Tacoma Intl	6h 19m	Alaska Airlines	AS364
from $340 Find flight	07:00 Boston Logan	10:37 Seattle Seattle-Tacoma Intl	6h 37m	Alaska Airlines	AS401
from $400 Find flight	07:00 Boston Logan	10:21 Seattle Seattle-Tacoma Intl	6h 21m	American Airlines	AA9302
from $416 Find flight	17:23 Boston Logan	21:00 Seattle Seattle-Tacoma Intl	6h 37m	Alaska Airlines	AS362
from $152 Find flight	06:00 Boston Logan	12:53 Seattle Seattle-Tacoma Intl	9h 53m layover 0h 50m - San Francisco	United Airlines	UA2441 UA2315
from $152 Find flight	08:00 Boston Logan	15:18 Seattle Seattle-Tacoma Intl	10h 18m layover 1h 10m - San Francisco	United Airlines	UA1008 UA2650
from $152 Find flight	13:30 Boston Logan	21:07 Seattle Seattle-Tacoma Intl	10h 37m layover 1h 31m - San Francisco	United Airlines	UA1187 UA2019
from $160 Find flight	19:30 Boston Logan	07:15+1 день Seattle Seattle-Tacoma Intl	14h 45m layover 6h 41m - Denver	JetBlue	B6393 F91175
from $163 Find flight	11:37 Boston Logan	17:08 Seattle Seattle-Tacoma Intl	8h 31m layover 1h 23m - Minneapolis	Sun Country Airlines	SY252 SY285
from $162 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 $162 Find flight	17:59 Boston Logan	07:15+1 день Seattle Seattle-Tacoma Intl	16h 16m layover 1h 9m - Philadelphia 6h 2m - Denver	American Airlines	AA1408 AA3174 F91175
from $162 Find flight	17:35 Boston Logan	07:15+1 день Seattle Seattle-Tacoma Intl	16h 40m layover 2h 0m - New York 5h 14m - Denver	JetBlue	B6517 B697 F91175

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*Departure and arrival times - local. Prices indicated for one-way flights. Information updated on April 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
07:00 — 10:30	07:00 — 10:30 B6497 JetBlue Boston — Seattle	6h 30m	Find flight from$149
07:00 — 10:21	07:00 — 10:21 AS459 Alaska Airlines Boston — Seattle	6h 21m	Find flight from$150
07:00 — 10:45	07:00 — 10:45 DL384 Delta Air Lines Inc. Boston — Seattle	6h 45m	Find flight from$167
07:00 — 10:37	07:00 — 10:37 AS401 Alaska Airlines Boston — Seattle	6h 37m	Find flight from$340
07:00 — 10:21	07:00 — 10:21 AA9302 American Airlines Boston — Seattle	6h 21m	Find flight from$400
17:23 — 21:00	17:23 — 21:00 AS362 Alaska Airlines Boston — Seattle	6h 37m	Find flight from$416
17:25 — 20:44	17:25 — 20:44 AS364 Alaska Airlines Boston — Seattle	6h 19m	Find flight from$184
18:40 — 22:25	18:40 — 22:25 DL324 Delta Air Lines Inc. Boston — Seattle	6h 45m	Find flight from$167
19:19 — 22:39	19:19 — 22:39 AS537 Alaska Airlines Boston — Seattle	6h 20m	Find flight 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	Find flight 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	Find flight 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	Find flight 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	Find flight 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	Find flight 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	Find flight 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	Find flight 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	Arrival	Flight Details	Flight Time	Price
		stop stop	including layover	Find flight from$

*Departure and arrival times - local. Updated on April 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 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.

B6 - JetBlue

from $149

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DL - Delta Air Lines Inc.

from $167

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AA - American Airlines

from $400

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AS - Alaska Airlines

from $150

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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.

DL - Delta Air Lines Inc.

from $244

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B6 - JetBlue

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

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AS - Alaska Airlines

from $164

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F9 - Frontier Airlines

from $165

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PD - Porter Airlines

from $501

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TK - Turkish Airlines

from $2123

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HA - Hawaiian Airlines

from $565

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NK - Spirit Airlines

from $162

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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 $149
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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 13 airlines that use 10 aircraft brands. They range from huge modern airplanes to small-sized.

Airbus A318/319/320/321

from $149

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Airbus A320

from $162

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Boeing 737-100/200

from $197

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Embraer 175 (short wing)

from $217

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Embraer Lineage 1000

from $219

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Boeing 737-800

from $228

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Airbus A321

from $228

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Embraer 170

from $254

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Boeing 757-200

from $270

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Boeing 737 MAX 8

from $292

Find

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

Find
Boston — Orlando

from $67

Find
Boston — Chicago

from $59

Find
Boston — Miami

from $56

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Boston — Washington D.C.

from $64

Find
Boston — Denver

from $65

Find
Boston — Nashville

from $71

Find
Boston — Tampa

from $63

Find
Boston — Las Vegas

from $63

Find
Boston — Seattle

from $60

Find

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

Find
Boston — Rome

from $77

Find
Boston — Cancun

from $78

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Boston — Lisbon

from $66

Find
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.
To find a plane ticket, please select dates.