$172 Cheap Frontier Airlines flights Philadelphia (PHL) to San Francisco (SFO)

$172 Cheap Frontier Airlines flights Philadelphia (PHL) to San Francisco (SFO)

Prices were available within the past 7 days and start at $172 for one-way flights and $339 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Oct 13 - Fri, Oct 17

PHL

Philadelphia

SFO

San Francisco

$339 Roundtrip, found 9 hours ago

$339

Roundtrip

found 9 hours ago

Select Frontier Airlines flight, departing Mon, Oct 13 from Philadelphia to San Francisco, returning Fri, Oct 17, priced at $339 found 9 hours ago

Sun, Dec 28 - Thu, Jan 1

TTN

Trenton

SFO

San Francisco

$955 Roundtrip, found 18 hours ago

$955

Roundtrip

found 18 hours ago

Select Frontier Airlines flight, departing Sun, Dec 28 from Trenton to San Francisco, returning Thu, Jan 1, priced at $955 found 18 hours ago