SEARCH ONE AND DONE. - Compare hundreds of travel sites at once.
Choose where to book.
Find deals from over 400 airlines worldwide.

Cheap Flights from Boston to Seattle (BOS - SEA)

DepartReturn
1 adult
Note: some airlines charge for infants in laps.
The price shown for each flight will be the average for all passengers including any infants.
Choose Sites to Compare vs. KAYAK

Best fares from BOS to SEA (Found by others)

Sun Mon Tue Wed Thu Fri Sat
      1 $350 2 $348 3 $350 4 $350
5 $422 6 $350 7 $345 8 $345 9 $350 10 $416 11 $350
12 $348 13 $455 14 $348 15 $311 16 $311 17 $328 18 $328
19 $378 20 $400 21 $306 22 $296 23 $296 24 $296 25 $301
26 $345 27 $300 28 $296 29 $296 30 $296 31 $301  
KAYAK searches hundreds of sites to find the best rate for your next flight from Boston to Seattle. Get the best flight deal for your Seattle trip!
Here's how it works. Search KAYAK for a flight ticket from Boston to Seattle. Sort, filter and compare results on one web page. Then book your plane ticket direct on the airline or travel agent site of your choice!
Direct flights BOS to SEA on Delta
Flight # Depart BOS Arrive SEA Sun Mon Tue Wed Thu Fri Sat Valid Between
7519 7:00 am 10:15 am Oct 8 - Oct 27
7519 7:00 am 10:15 am Sep 29 - Oct 7
7519 7:00 am 10:15 am Oct 28 - Nov 1
7519 7:00 am 10:15 am Oct 29 - Oct 31
7519 7:00 am 10:15 am Nov 2 - Nov 2
9238 7:35 am 11:10 am Nov 3 - Nov 10
9238 7:35 am 11:10 am Nov 4 - Nov 13
9238 8:40 am 11:55 am Oct 6 - Nov 1
7482 6:10 pm 9:28 pm Sep 28 - Nov 1
7482 6:40 pm 10:10 pm Nov 2 - Nov 6
7482 6:40 pm 10:10 pm Nov 4 - Nov 10