AirHint found the following cheapest return flights from Singapore (SIN) to Lisbon (LIS) in September 2026 (see full year).
Return flights
| 11 Sep - 27 Sep | Etihad Airways | ||
| 28 Sep - 11 Oct | Turkish Airlines | ||
| 04 Sep - 08 Sep | Finnair | ||
| 30 Sep - 03 Oct | Etihad Airways |
Also check the deals for one-way flights from Singapore to Lisbon in September.
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