AirHint found the following cheapest return flights from Lisbon (LIS) to Singapore (SIN) in September 2026 (see full year).
Return flights
| 28 Sep - 12 Oct | Etihad Airways | ||
| 16 Sep - 22 Sep | Air France | ||
| 28 Sep - 11 Oct | Etihad Airways | ||
| 27 Sep - 11 Oct | SWISS | ||
| 01 Sep - 06 Sep | Finnair |
Also check the deals for one-way flights from Lisbon to Singapore in September.
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