Chicago to San Francisco in September 2026

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

Lowest this month $83

Highest this month $213

Sample fare $83

Airports ORD–SFO

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September 2026 price calendar

From $83 · up to $213

Mon

Tue

Wed

Thu

Fri

Sat

Sun

1 $167 2 $180 3 $192 4 $209 5 $211 6 $211 7 $213 8 $189 9 $166 10 $155 11 $155 12 $145 13 $119 14 $104 15 $94 16 $94 17 $85 18 $86 19 $87 20 $138 21 $83

San Francisco SFO

$83

Sep 21, 1:01pm · 11h 27m · 1 stop

ORD → SFO · Frontier Airlines

San Francisco SFO

$85

Sep 17, 6:25am · 15h 23m · 1 stop

MDW → SFO · Frontier Airlines

San Francisco SFO

$87

Sep 19, 4:35pm · 7h 53m · 1 stop

ORD → SFO · Frontier Airlines

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