Buffalo to Chicago in September 2026

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

Lowest this month $90

Highest this month $163

Sample fare $90

Airports BUF–MDW

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September 2026 price calendar

From $90 · up to $163

Mon

Tue

Wed

Thu

Fri

Sat

Sun

1 $156 2 $156 3 $160 4 $163 5 $128 6 $128 7 $128 8 $128 9 $128 10 $128 11 $128 12 $128 13 $128 14 $93 15 $99 16 $105 17 $94 18 $90

Chicago CHI

$90

Sep 18, 1:40pm · 5h 11m · 1 stop

BUF → MDW · Frontier Airlines

Chicago CHI

$93

Sep 14, 1:40pm · 5h 43m · 1 stop

BUF → ORD · Frontier Airlines

Chicago CHI

$94

Sep 17, 12:49pm · 11h 10m · 1 stop

BUF → ORD · Frontier Airlines

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