Philadelphia to San Francisco in September 2026

Dated one-way fares from Philadelphia to San Francisco in September 2026. Use the calendar to see which days are cheaper.

Lowest this month $119

Highest this month $192

Sample fare $119

Airports PHL–SFO

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September 2026 price calendar

From $119 · up to $192

Mon

Tue

Wed

Thu

Fri

Sat

Sun

1 $192 2 $188 3 $153 4 $153 5 $153 6 $153 7 $153 8 $153 9 $153 10 $153 11 $153 12 $153 13 $153 14 $153 15 $153 16 $153 17 $153 18 $153 19 $153 20 $153 21 $153 22 $153 23 $119 24 $135 25 $135 26 $135 27 $151 28 $129 29 $124 30 $119

San Francisco SFO

$119

Sep 23, 12:40pm · 10h 28m · 1 stop

PHL → SFO · Frontier Airlines

San Francisco SFO

$119

Sep 30, 12:40pm · 10h 28m · 1 stop

PHL → SFO · Frontier Airlines

San Francisco SFO

$129

Sep 28, 12:40pm · 10h 8m · 1 stop

PHL → SFO · Frontier Airlines

This page is only September 2026 on the Philadelphia to San Francisco route. Open the full route if you want the next months side by side.

Prices move as seats sell. Confirm the live itinerary before you book Philadelphia to San Francisco in September 2026.