$234 Cheap Alaska Airlines flights Seattle (SEA) to Boston (BOS)

View $234 flight on Mon, Jan 12, 2026Opens in a new window

$234 Cheap Alaska Airlines flights Seattle (SEA) to Boston (BOS)

Prices were available within the past 7 days and start at $234 for one-way flights and $1,778 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Fri, Dec 19 - Sat, Dec 27
SEA
Seattle
BOS
Boston
$1,778 Roundtrip, found 13 hours ago
$1,778
Roundtrip
found 13 hours ago
Select Alaska Airlines flight, departing Fri, Dec 19 from Seattle to Boston, returning Sat, Dec 27, priced at $1,778 found 13 hours ago

Find the cheapest month to fly from Seattle (SEA) to Boston (BOS)

March is typically the cheapest month to fly

From $157 - $307 per traveler.
Flights from Seattle (SEA) to Boston (BOS)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Logan Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Southwest Airlines, Sun Country Airlines, United
Popular airline
Delta
Distance
3980 km
Average flight time
9 hours 25 mins