AirHint found the following cheapest return flights from Rotterdam (RTM) to Lisbon (LIS) in August 2026 (see full year).
Return flights
| 29 Aug - 12 Sep | transavia | direct | |
| 22 Aug - 29 Aug | transavia | direct | |
| 06 Aug - 29 Aug | transavia | ||
| 03 Aug - 09 Aug | transavia | direct |
Also check the deals for one-way flights from Rotterdam to Lisbon in August.
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