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

Return flights

26 Aug - 08 Sep	Air France
26 Aug - 09 Sep	Air France
28 Aug - 04 Sep	Air France
31 Aug - 07 Sep	Wizz Air
27 Aug - 03 Sep	Etihad Airways
26 Aug - 02 Sep	Air Serbia
30 Aug - 06 Sep	TAP
29 Aug - 05 Sep	Pegasus Airlines
29 Aug - 15 Sep	Air France
30 Aug - 14 Sep	Qatar Airways
24 Aug - 31 Aug	Etihad Airways
19 Aug - 26 Aug	Wizz Air
21 Aug - 28 Aug	Wizz Air
17 Aug - 24 Aug	easyJet
22 Aug - 30 Aug	Air Serbia
23 Aug - 30 Aug	Ryanair
18 Aug - 25 Aug	Finnair
20 Aug - 27 Aug	easyJet
20 Aug - 25 Aug	Finnair
22 Aug - 29 Aug	TAP

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

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 August from 643€

Return flights