Philadelphia to San Juan in September 2026

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

Lowest this month $64

Highest this month $140

Sample fare $64

Airports PHL–SJU

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September 2026 price calendar

From $64 · up to $140

Mon

Tue

Wed

Thu

Fri

Sat

Sun

1 $140 2 $102 3 $102 4 $102 5 $102 6 $102 7 $102 8 $102 9 $102 10 $102 11 $102 12 $102 13 $102 14 $102 15 $102 16 $64 17 $75 18 $75 19 $75 20 $75 21 $75 22 $75 23 $75 24 $86

San Juan SJU

$64

Sep 16, 12:25pm · 3h 57m · 0 stops

PHL → SJU · Frontier Airlines

San Juan SJU

$86

Sep 24, 8:02pm · 3h 59m · 0 stops

PHL → SJU · Frontier Airlines

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