Find Deals on Flights from Seattle to Boston Logan International

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 Seattle to Boston Logan International

(Round-trip)
Depart: Tue Apr 18 2017 Return: Mon Apr 24 2017 Trip spans 7 days
Sun Country Air
Sun Country Air
SEA
9:25a
BOS
4:14p
6h 49m
1 stop
BOS
3:00a
SEA
11:30a
8h 30m
1 stop
Depart: Sat May 6 2017 Return: Tue May 9 2017 Trip spans 4 days
Major Airline
Major Airline
SEA
2:35p
BOS
11:52p
9h 17m
1 stop
BOS
4:32a
SEA
7:25a
26h 53m
1 stop
Depart: Mon Sep 18 2017 Return: Wed Sep 20 2017 Trip spans 3 days
Alaska Airlines
Alaska Airlines
SEA
7:35p
BOS
12:48a
5h 13m
nonstop
BOS
2:55p
SEA
9:10p
6h 15m
nonstop
Depart: Tue May 9 2017 Return: Fri May 19 2017 Trip spans 11 days
Delta
Delta
SEA
7:15a
BOS
12:56p
5h 41m
nonstop
BOS
1:40p
SEA
10:10p
8h 30m
1 stop
Depart: Tue Apr 11 2017 Return: Mon Apr 24 2017 Trip spans 14 days
American Airlines
American Airlines
SEA
11:35a
BOS
4:57p
5h 22m
nonstop
BOS
2:55p
SEA
9:15p
6h 20m
nonstop
Depart: Tue Sep 5 2017 Return: Tue Sep 19 2017 Trip spans 15 days
United
United
SEA
8:53p
BOS
5:47a
8h 54m
1 stop
BOS
2:00a
SEA
9:46a
7h 46m
1 stop
Depart: Wed May 24 2017 Return: Tue May 30 2017 Trip spans 7 days
Spirit Airlines
Spirit Airlines
SEA
11:23a
BOS
1:05a
13h 42m
1 stop
BOS
5:00p
SEA
9:00a
16h 00m
1 stop
Depart: Thu Apr 20 2017 Return: Mon Apr 24 2017 Trip spans 5 days
JetBlue
JetBlue
SEA
7:38p
BOS
12:53a
5h 15m
nonstop
BOS
3:25p
SEA
9:46p
6h 21m
nonstop
Depart: Wed Apr 19 2017 Return: Wed Apr 26 2017 Trip spans 8 days
Sun Country Air
Sun Country Air
SEA
9:25a
BOS
4:14p
6h 49m
1 stop
BOS
3:00a
SEA
11:30a
8h 30m
1 stop
Depart: Wed May 10 2017 Return: Sun May 14 2017 Trip spans 5 days
Major Airline
Major Airline
SEA
11:43p
BOS
5:50a
30h 07m
1 stop
BOS
11:25p
SEA
11:09a
11h 44m
1 stop
Depart: Mon Sep 11 2017 Return: Tue Sep 19 2017 Trip spans 9 days
Alaska Airlines
Alaska Airlines
SEA
7:35p
BOS
12:48a
5h 13m
nonstop
BOS
3:00a
SEA
9:17a
6h 17m
nonstop
Depart: Wed Apr 26 2017 Return: Tue May 9 2017 Trip spans 14 days
Sun Country Air
Sun Country Air
SEA
9:25a
BOS
4:14p
6h 49m
1 stop
BOS
7:45a
SEA
3:50p
8h 05m
1 stop
Depart: Sat Sep 16 2017 Return: Tue Sep 19 2017 Trip spans 4 days
Delta
Delta
SEA
12:55p
BOS
10:11p
9h 16m
1 stop
BOS
3:20a
SEA
9:30a
6h 10m
nonstop
Depart: Thu May 11 2017 Return: Sun May 14 2017 Trip spans 4 days
Major Airline
Major Airline
SEA
10:55a
BOS
8:50p
9h 55m
1 stop
BOS
10:45p
SEA
6:50a
8h 05m
1 stop
Depart: Mon Jun 5 2017 Return: Tue Jun 6 2017 Trip spans 2 days
United
United
SEA
6:35p
BOS
2:47a
8h 12m
1 stop
BOS
10:42a
SEA
11:16p
12h 34m
2 stops
Depart: Tue Sep 19 2017 Return: Wed Sep 20 2017 Trip spans 2 days
Alaska Airlines
Alaska Airlines
SEA
11:35a
BOS
5:10p
5h 35m
nonstop
BOS
3:00a
SEA
9:17a
6h 17m
nonstop
Depart: Tue May 2 2017 Return: Mon May 8 2017 Trip spans 7 days
Sun Country Air
Sun Country Air
SEA
8:45a
BOS
4:30p
7h 45m
1 stop
BOS
2:45a
SEA
10:50a
8h 05m
1 stop
Depart: Sat May 13 2017 Return: Thu May 18 2017 Trip spans 6 days
Major Airline
Major Airline
SEA
10:00a
BOS
7:05p
9h 05m
1 stop
BOS
9:30p
SEA
7:25a
9h 55m
1 stop
Depart: Tue Apr 4 2017 Return: Mon May 1 2017 Trip spans 28 days
American Airlines
American Airlines
SEA
9:31a
BOS
5:54p
8h 23m
1 stop
BOS
3:00a
SEA
9:29a
6h 29m
nonstop
Depart: Sun Apr 16 2017 Return: Fri May 5 2017 Trip spans 20 days
Delta
Delta
SEA
6:15a
BOS
4:47p
10h 32m
1 stop
BOS
1:40p
SEA
10:10p
8h 30m
1 stop
* 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.

Airports
Origin

Seattle
$272
Destination

Boston
$272
Airlines Airline reviews

62 travelers who booked a flight from Seattle to Boston rated their chosen airlines with an average of 7.9.

Overall
8.1
Boarding
8.0
Crew
8.7
Comfort
7.8
Food
6.7
Entertainment
6.5