Boston to Philadelphia in September 2026

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

Lowest this month $83

Highest this month $151

Sample fare $83

Airports BOS–PHL

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September 2026 price calendar

From $83 · up to $151

Mon

Tue

Wed

Thu

Fri

Sat

Sun

1 $151 2 $83 3 $102 4 $102 5 $102 6 $121 7 $123 8 $116 9 $116 10 $116 11 $116 12 $116 13 $116 14 $116 15 $116 16 $116 17 $116 18 $116 19 $116 20 $116 21 $116 22 $116 23 $110

Philadelphia PHL

$83

Sep 02, 12:45pm · 9h 48m · 1 stop

BOS → PHL · Frontier Airlines

Philadelphia PHL

$110

Sep 23, 12:54pm · 10h 24m · 1 stop

BOS → PHL · Frontier Airlines

This page is only September 2026 on the Boston to Philadelphia 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 Boston to Philadelphia in September 2026.