AirHint found the following cheapest return flights from Philadelphia (PHL) to Lisbon (LIS) in April 2026 (see full year).
Return flights
| 20 Apr - 16 May | TAP | ||
| 10 Apr - 15 Apr | TAP | ||
| 19 Apr - 09 May | TAP | ||
| 10 Apr - 17 Apr | TAP | ||
| 15 Apr - 22 Apr | TAP | ||
| 19 Apr - 09 May | Iberia | direct | |
| 20 Apr - 16 May | Iberia | direct | |
| 10 Apr - 15 Apr | Iberia | direct |
Also check the deals for one-way flights from Philadelphia to Lisbon in April.
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