$158 Cheap Alaska Airlines flights San Francisco (SFO) to Boston (BOS)

View $158 flight on Wed, May 6, 2026Opens in a new window

$158 Cheap Alaska Airlines flights San Francisco (SFO) to Boston (BOS)

Prices were available within the past 7 days and start at $158 for one-way flights and $295 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed, May 6 - Sun, May 10
SFO
San Francisco
BOS
Boston
$295 Roundtrip, found 18 hours ago
$295
Roundtrip
found 18 hours ago
Select Alaska Airlines flight, departing Wed, May 6 from San Francisco to Boston, returning Sun, May 10, priced at $295 found 18 hours ago
Alaska Airlines
Wed, Jan 28 - Sun, Feb 1
SFO
San Francisco
BOS
Boston
$384 Roundtrip, found 3 days ago
$384
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Wed, Jan 28 from San Francisco to Boston, returning Sun, Feb 1, priced at $384 found 3 days ago

Find the cheapest month to fly from San Francisco (SFO) to Boston (BOS)

May is typically the cheapest month to fly

From $160 - $289 per traveler.
Flights from San Francisco (SFO) to Boston (BOS)
Origin airport
San Francisco Intl.
Destination airport
Logan Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, JetBlue Airways, Southwest Airlines, Sun Country Airlines, United
Popular airline
Delta
Distance
4315 km
Average flight time
8 hours 36 mins