Find Cheap 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: Thu Nov 30 2017 Return: Sun Dec 3 2017 Trip spans 4 days
JetBlue
JetBlue
SEA
7:51a
BOS
1:02p
5h 11m
nonstop
BOS
3:41a
SEA
10:00a
6h 19m
nonstop
Depart: Wed Oct 11 2017 Return: Wed Oct 18 2017 Trip spans 8 days
Delta
Delta
SEA
5:50a
BOS
11:15a
5h 25m
nonstop
BOS
3:15a
SEA
9:25a
6h 10m
nonstop
Depart: Wed Oct 25 2017 Return: Mon Oct 30 2017 Trip spans 6 days
Alaska Airlines
Alaska Airlines
SEA
7:35p
BOS
12:50a
5h 15m
nonstop
BOS
2:55p
SEA
9:15p
6h 20m
nonstop
Depart: Thu Oct 19 2017 Return: Mon Oct 23 2017 Trip spans 5 days
Major Airline
Major Airline
SEA
4:45a
BOS
12:35p
7h 50m
1 stop
BOS
6:55a
SEA
3:59p
9h 04m
1 stop
Depart: Tue Sep 12 2017 Return: Sat Sep 23 2017 Trip spans 12 days
United
United
SEA
8:53p
BOS
5:47a
8h 54m
1 stop
BOS
2:00a
SEA
9:46a
7h 46m
1 stop
Depart: Tue Sep 26 2017 Return: Mon Oct 16 2017 Trip spans 21 days
American Airlines
American Airlines
SEA
7:56a
BOS
2:52p
6h 56m
1 stop
BOS
2:30p
SEA
10:40p
8h 10m
1 stop
Depart: Tue May 23 2017 Return: Sat May 27 2017 Trip spans 5 days
Sun Country Air
Sun Country Air
SEA
1:40p
BOS
3:45a
14h 05m
1 stop
BOS
2:35a
SEA
10:50a
8h 15m
1 stop
Depart: Wed May 31 2017 Return: Tue Jun 13 2017 Trip spans 14 days
Spirit Airlines
Spirit Airlines
SEA
2:00a
BOS
12:59p
10h 59m
2 stops
BOS
6:20a
SEA
7:49a
25h 29m
2 stops
Depart: Wed Oct 18 2017 Return: Thu Oct 26 2017 Trip spans 9 days
Delta
Delta
SEA
5:50a
BOS
11:15a
5h 25m
nonstop
BOS
1:35p
SEA
7:54p
6h 19m
nonstop
Depart: Fri Oct 27 2017 Return: Sun Oct 29 2017 Trip spans 3 days
Alaska Airlines
Alaska Airlines
SEA
11:40a
BOS
4:59p
5h 19m
nonstop
BOS
3:05a
SEA
9:35a
6h 30m
nonstop
Depart: Tue Sep 5 2017 Return: Tue Sep 12 2017 Trip spans 8 days
Major Airline
Major Airline
SEA
10:05p
BOS
7:20a
9h 15m
1 stop
BOS
12:55p
SEA
6:50a
17h 55m
1 stop
Depart: Wed Sep 13 2017 Return: Wed Sep 20 2017 Trip spans 8 days
United
United
SEA
5:25a
BOS
3:16p
9h 51m
1 stop
BOS
2:00a
SEA
9:46a
7h 46m
1 stop
Depart: Wed Oct 4 2017 Return: Tue Oct 10 2017 Trip spans 7 days
American Airlines
American Airlines
SEA
7:56a
BOS
3:37p
7h 41m
1 stop
BOS
2:00a
SEA
10:06a
8h 06m
1 stop
Depart: Sat Oct 28 2017 Return: Sun Oct 29 2017 Trip spans 2 days
Alaska Airlines
Alaska Airlines
SEA
11:40a
BOS
4:59p
5h 19m
nonstop
BOS
3:05a
SEA
9:35a
6h 30m
nonstop
Depart: Thu Nov 2 2017 Return: Mon Nov 6 2017 Trip spans 5 days
Delta
Delta
SEA
7:30a
BOS
12:55p
5h 25m
nonstop
BOS
12:35p
SEA
6:54p
6h 19m
nonstop
Depart: Wed Sep 6 2017 Return: Sat Sep 23 2017 Trip spans 18 days
Major Airline
Major Airline
SEA
2:00a
BOS
11:00a
9h 00m
1 stop
BOS
8:40a
SEA
6:59p
10h 19m
1 stop
Depart: Tue Sep 19 2017 Return: Sat Sep 30 2017 Trip spans 12 days
United
United
SEA
8:53p
BOS
5:47a
8h 54m
1 stop
BOS
2:00a
SEA
9:46a
7h 46m
1 stop
Depart: Thu Sep 21 2017 Return: Tue Sep 26 2017 Trip spans 6 days
JetBlue
JetBlue
SEA
7:29p
BOS
12:42a
5h 13m
nonstop
BOS
3:14a
SEA
9:32a
6h 18m
nonstop
Depart: Mon Sep 25 2017 Return: Mon Oct 9 2017 Trip spans 15 days
American Airlines
American Airlines
SEA
9:31a
BOS
6:03p
8h 32m
1 stop
BOS
2:30p
SEA
10:40p
8h 10m
1 stop
Depart: Tue Oct 31 2017 Return: Tue Nov 7 2017 Trip spans 8 days
Alaska Airlines
Alaska Airlines
SEA
7:35p
BOS
12:50a
5h 15m
nonstop
BOS
1:55p
SEA
8:10p
6h 15m
nonstop
* 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
$237
Destination

Boston
$237
Airlines Airline reviews

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

Overall
8.0
Boarding
8.1
Crew
8.7
Comfort
7.7
Food
6.6
Entertainment
6.4