Portland to San Francisco in September 2026

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

Lowest this month $74

Highest this month $143

Sample fare $55

Airports PDX–SFO

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September 2026 price calendar

From $74 · up to $143

Mon

Tue

Wed

Thu

Fri

Sat

Sun

2 $120 3 $101 4 $83 5 $78 6 $78 7 $78 8 $78 9 $78 10 $78 11 $74 12 $108 13 $143

San Francisco SFO

$74

Sep 11, 11:15am · 1h 56m · 0 stops

PDX → SFO · United Airlines

San Francisco SFO

$83

Sep 04, 5:30am · 1h 51m · 0 stops

PDX → SFO · United Airlines

This page is only September 2026 on the Portland 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 Portland to San Francisco in September 2026.