Denver to San Francisco in September 2026

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

Lowest this month $64

Highest this month $123

Sample fare $64

Airports DEN–SFO

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September 2026 price calendar

From $64 · up to $123

Mon

Tue

Wed

Thu

Fri

Sat

Sun

2 $123 3 $93 4 $93 5 $93 6 $93 7 $93 8 $93 9 $64 10 $66 11 $66 12 $66 13 $66 14 $66 15 $66 16 $68

San Francisco SFO

$64

Sep 09, 10:44pm · 15h 59m · 1 stop

DEN → SFO · Frontier Airlines

San Francisco SFO

$68

Sep 16, 8:59am · 2h 48m · 0 stops

DEN → SFO · Frontier Airlines

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