FFL Helper
Chicago CHI
$184
SFO → ORD · Frontier Airlines
FFL Helper / Oakland / Chicago / September 2026
OAK → CHI · 2026-09
Oakland to Chicago in September 2026
Dated one-way fares from Oakland to Chicago in September 2026. Use the calendar to see which days are cheaper.
Lowest this month
$184
Highest this month
$184
Sample fare
$184
Airports
SFO–ORD
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Other months: August 2026 · September 2026 · Full route
September 2026 price calendar
September 2026
From $184
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$184
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Dated fares
Booking OAK to CHI in September 2026
This page is only September 2026 on the Oakland to Chicago 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 Oakland to Chicago in September 2026.