$140 Cheap Frontier Airlines flights San Francisco (SFO) to Boston (BOS)

View $140 flight on Tue, Apr 14, 2026Opens in a new window

$140 Cheap Frontier Airlines flights San Francisco (SFO) to Boston (BOS)

Prices were available within the past 7 days and start at $140 for one-way flights and $255 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Tue, Apr 14 - Fri, Apr 24
SFO
San Francisco
BOS
Boston
$255 Roundtrip, found 1 day ago
$255
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Apr 14 from San Francisco to Boston, returning Fri, Apr 24, priced at $255 found 1 day ago
Frontier Airlines
Tue, Apr 14 - Fri, Apr 24
SFO
San Francisco
BOS
Boston
$314 Roundtrip, found 1 day ago
$314
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Apr 14 from San Francisco to Boston, returning Fri, Apr 24, priced at $314 found 1 day ago
Frontier Airlines
Tue, Apr 14 - Fri, Apr 24
SFO
San Francisco
BOS
Boston
$403 Roundtrip, found 1 day ago
$403
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Apr 14 from San Francisco to Boston, returning Fri, Apr 24, priced at $403 found 1 day ago

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

April is typically the cheapest month to fly

From $185 - $394 per traveler.

Travel information

Origin airport
San Francisco Intl.
Destination airport
Logan Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, United
Popular airline
Frontier Airlines
Distance
4315 km
Average flight time
8 hours 45 mins

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