FFL Helper
Chicago CHI
$168
PHL → MDW · Frontier Airlines
FFL Helper / Philadelphia / Chicago / September 2026
PHL → CHI · 2026-09
Philadelphia to Chicago in September 2026
Dated one-way fares from Philadelphia to Chicago in September 2026. Use the calendar to see which days are cheaper.
Lowest this month
$168
Highest this month
$168
Sample fare
$109
Airports
PHL–ORD
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Other months: August 2026 · September 2026 · Full route
September 2026 price calendar
September 2026
From $168
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$168
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Dated fares
Booking PHL to CHI in September 2026
This page is only September 2026 on the Philadelphia 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 Philadelphia to Chicago in September 2026.