AirHint found the following cheapest return flights from Lisbon (LIS) to Warsaw (WMI) in September 2026 (see full year).
Return flights
| 23 Sep - 10 Oct | Ryanair | direct | |
| 01 Sep - 02 Sep | Ryanair | direct | |
| 05 Sep - 16 Sep | Ryanair | direct | |
| 01 Sep - 16 Sep | Ryanair | direct | |
| 09 Sep - 16 Sep | Ryanair | direct |
Also check the deals for one-way flights from Lisbon to Warsaw in September.
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