AirHint found the following cheapest return flights from Philadelphia (PHL) to Lisbon (LIS) in April 2026 (see full year).
Return flights
| 17 Apr - 20 Apr | Iberia | ||
| 06 Apr - 21 Apr | Aer Lingus | ||
| 03 Apr - 06 Apr | TAP | ||
| 15 Apr - 18 Apr | Spirit Airlines |
Also check the deals for one-way flights from Philadelphia to Lisbon in April.
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