FFL Helper
Chicago CHI
$103
SAN → ORD · Frontier Airlines
FFL Helper / San Diego / Chicago / September 2026
SAN → CHI · 2026-09
San Diego to Chicago in September 2026
Dated one-way fares from San Diego to Chicago in September 2026. Use the calendar to see which days are cheaper.
Lowest this month
$103
Highest this month
$103
Sample fare
$103
Airports
SAN–ORD
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Other months: August 2026 · September 2026 · Full route
September 2026 price calendar
September 2026
From $103
Mon
Tue
Wed
Thu
Fri
Sat
Sun
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2
3
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9
$103
10
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12
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Dated fares
Booking SAN to CHI in September 2026
This page is only September 2026 on the San Diego 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 San Diego to Chicago in September 2026.