San Francisco to Denver in September 2026

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

Lowest this month $46

Highest this month $123

Sample fare $46

Airports SFO–DEN

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September 2026 price calendar

From $46 · up to $123

Mon

Tue

Wed

Thu

Fri

Sat

Sun

2 $123 3 $96 4 $96 5 $96 6 $96 7 $96 8 $96 9 $96 10 $96 11 $70 12 $67 13 $116 14 $81 15 $81 16 $46 17 $59 18 $74 19 $54 20 $118 21 $66 22 $62 23 $65 24 $65 25 $65 26 $65 27 $65 28 $65 29 $65 30 $68

Denver DEN

$46

Sep 16, 11:42am · 2h 48m · 0 stops

SFO → DEN · Frontier Airlines

Denver DEN

$54

Sep 19, 6:04am · 2h 42m · 0 stops

SFO → DEN · Frontier Airlines

Denver DEN

$59

Sep 17, 9:42am · 2h 47m · 0 stops

SFO → DEN · Frontier Airlines

Denver DEN

$62

Sep 22, 6:04am · 2h 42m · 0 stops

SFO → DEN · Frontier Airlines

Denver DEN

$66

Sep 21, 4:34pm · 2h 46m · 0 stops

SFO → DEN · Frontier Airlines

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