AirHint found the following cheapest return flights from Lisbon (LIS) to Singapore (SIN) in September 2025 (see full year).

Return flights

25 Sep - 13 Oct	SWISS
08 Sep - 24 Sep	SWISS
10 Sep - 17 Sep	Finnair
18 Sep - 01 Oct	Finnair
24 Sep - 01 Oct	Finnair
15 Sep - 06 Oct	Wizz Air
15 Sep - 22 Sep	Wizz Air
16 Sep - 23 Sep	British Airways
23 Sep - 30 Sep	British Airways
23 Sep - 16 Oct	British Airways
29 Sep - 07 Oct	Air France
02 Sep - 09 Sep	Etihad Airways
17 Sep - 24 Sep	Etihad Airways
30 Sep - 07 Oct	Ryanair
03 Sep - 16 Sep	Etihad Airways
04 Sep - 16 Sep	Etihad Airways
01 Sep - 08 Sep	Air France
07 Sep - 16 Oct	Air France
16 Sep - 06 Oct	TAP
26 Sep - 03 Oct	Ryanair

Also check the deals for one-way flights from Lisbon to Singapore in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Lisbon to Singapore in September from 589€

Return flights