AirHint found the following cheapest one-way flights from Philadelphia (PHL) to Lisbon (LIS) in September 2026 (see full year).
One-Way flights
| 15 Sep | Aer Lingus | ||
| 20 Sep | Lufthansa | ||
| 21 Sep | Aer Lingus | ||
| 30 Sep | Lufthansa | ||
| 27 Sep | Lufthansa | ||
| 18 Sep | Aer Lingus | ||
| 23 Sep | Lufthansa | ||
| 22 Sep | Aer Lingus | ||
| 28 Sep | Aer Lingus | ||
| 24 Sep | Lufthansa |
Also check the deals for return flights from Philadelphia to Lisbon in September.
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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.
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