Find Deals on Flights from Boston Logan International to Seattle/Tacoma Intl (BOS - SEA)

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
The price shown for each flight will be the average for all passengers including any infants.
Compare vs. KAYAK all | none
Browse Origins:
Browse Destinations:

Dates flexible? Here are the best fares found in the past 48 hours...

Book cheap flights from Boston Logan International to Seattle/Tacoma Intl

(Round-trip)
Depart: Fri Oct 21 2016 Return: Mon Oct 24 2016 Trip spans 4 days
Sun Country Air
Sun Country Air
BOS
2:55a
SEA
11:27a
8h 32m
1 stop
SEA
9:20a
BOS
4:14p
6h 54m
1 stop
Depart: Tue Nov 1 2016 Return: Wed Nov 2 2016 Trip spans 2 days
Major Airline
Major Airline
BOS
1:00a
SEA
7:15a
6h 15m
nonstop
SEA
3:10p
BOS
8:20p
5h 10m
nonstop
Depart: Sat Oct 15 2016 Return: Wed Oct 26 2016 Trip spans 12 days
Delta
Delta
BOS
3:10a
SEA
9:28a
6h 18m
nonstop
SEA
8:00a
BOS
1:29p
5h 29m
nonstop
Depart: Sat Nov 5 2016 Return: Tue Nov 8 2016 Trip spans 4 days
Alaska Airlines
Alaska Airlines
BOS
5:00a
SEA
11:15a
6h 15m
nonstop
SEA
4:25p
BOS
9:36p
5h 11m
nonstop
Depart: Sat Dec 3 2016 Return: Sat Dec 10 2016 Trip spans 8 days
JetBlue
JetBlue
BOS
2:15p
SEA
8:37p
6h 22m
nonstop
SEA
6:29p
BOS
11:39p
5h 10m
nonstop
Depart: Wed Oct 12 2016 Return: Tue Oct 25 2016 Trip spans 14 days
United
United
BOS
1:50a
SEA
10:37a
8h 47m
1 stop
SEA
9:50a
BOS
5:35p
7h 45m
1 stop
Depart: Sun Mar 5 2017 Return: Mon Mar 13 2017 Trip spans 8 days
Virgin America
Virgin America
BOS
2:15a
SEA
2:30p
12h 15m
1 stop
SEA
1:15p
BOS
11:05p
9h 50m
1 stop
Depart: Sat Mar 11 2017 Return: Mon Mar 20 2017 Trip spans 9 days
American Airlines
American Airlines
BOS
2:00a
SEA
8:40a
6h 40m
nonstop
SEA
6:30p
BOS
11:43p
5h 13m
nonstop
Depart: Mon Jan 2 2017 Return: Wed Jan 4 2017 Trip spans 3 days
Spirit Airlines
Spirit Airlines
BOS
11:40a
SEA
9:45p
10h 05m
1 stop
SEA
10:00a
BOS
9:53p
11h 53m
1 stop
Depart: Thu Oct 27 2016 Return: Tue Nov 1 2016 Trip spans 6 days
Sun Country Air
Sun Country Air
BOS
2:55a
SEA
11:27a
8h 32m
1 stop
SEA
9:20a
BOS
4:14p
6h 54m
1 stop
Depart: Wed Oct 5 2016 Return: Sun Oct 9 2016 Trip spans 5 days
Major Airline
Major Airline
BOS
8:40a
SEA
4:48p
8h 08m
1 stop
SEA
10:25a
BOS
8:44p
10h 19m
1 stop
Depart: Sat Nov 12 2016 Return: Tue Nov 15 2016 Trip spans 4 days
Alaska Airlines
Alaska Airlines
BOS
1:50p
SEA
8:25p
6h 35m
nonstop
SEA
4:25p
BOS
9:36p
5h 11m
nonstop
Depart: Wed Dec 7 2016 Return: Sat Dec 10 2016 Trip spans 4 days
JetBlue
JetBlue
BOS
5:15a
SEA
11:31a
6h 16m
nonstop
SEA
6:29p
BOS
11:39p
5h 10m
nonstop
Depart: Tue Oct 11 2016 Return: Wed Oct 12 2016 Trip spans 2 days
United
United
BOS
1:50a
SEA
10:37a
8h 47m
1 stop
SEA
8:55a
BOS
5:12p
8h 17m
1 stop
Depart: Tue Oct 4 2016 Return: Tue Oct 18 2016 Trip spans 15 days
Sun Country Air
Sun Country Air
BOS
7:40a
SEA
3:57p
8h 17m
1 stop
SEA
9:20a
BOS
4:14p
6h 54m
1 stop
Depart: Wed Dec 14 2016 Return: Fri Jan 6 2017 Trip spans 24 days
Major Airline
Major Airline
BOS
9:15p
SEA
3:50p
18h 35m
1 stop
SEA
9:00p
BOS
2:20a
29h 20m
1 stop
Depart: Sat Dec 10 2016 Return: Tue Dec 13 2016 Trip spans 4 days
JetBlue
JetBlue
BOS
2:15p
SEA
8:37p
6h 22m
nonstop
SEA
6:29p
BOS
11:39p
5h 10m
nonstop
Depart: Sat Jan 7 2017 Return: Tue Jan 10 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
BOS
1:50p
SEA
8:30p
6h 40m
nonstop
SEA
4:30a
BOS
9:48a
5h 18m
nonstop
Depart: Wed Nov 30 2016 Return: Sat Dec 3 2016 Trip spans 4 days
United
United
BOS
12:50a
SEA
9:37a
8h 47m
1 stop
SEA
1:17a
BOS
10:14a
8h 57m
1 stop
Depart: Tue Oct 18 2016 Return: Tue Oct 25 2016 Trip spans 8 days
Sun Country Air
Sun Country Air
BOS
7:40a
SEA
3:57p
8h 17m
1 stop
SEA
9:20a
BOS
4:14p
6h 54m
1 stop
Direct flights BOS to SEA on Delta
Flight # Depart BOS Arrive SEA Sun Mon Tue Wed Thu Fri Sat Valid Between
863 7:10 am 10:29 am Oct 2 - Nov 4
863 7:10 am 10:28 am Oct 1 - Nov 5
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an email and someone from our team will get back to you promptly.

^ The fares displayed in KAYAK ads found on other sites include all taxes and fees for economy class travel and were found by KAYAK users in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.
Airports
Origin

Boston
$246
Destination

Seattle
$246
Airlines Airline reviews

49 travelers who booked a flight from Boston to Seattle rated their chosen airlines with an average of 8.1.

Overall
8.4
Boarding
8.6
Crew
8.6
Comfort
8.1
Food
7.3
Entertainment
6.8