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

Return flights

01 Dec - 30 Dec	Lufthansa
01 Dec - 15 Dec	Lufthansa
04 Dec - 07 Dec	British Airways
08 Dec - 15 Dec	Wizz Air
06 Dec - 13 Dec	Air France
04 Dec - 11 Dec	easyJet
10 Dec - 17 Dec	British Airways
12 Dec - 22 Dec	Air France
15 Dec - 29 Dec	Air France
30 Dec - 17 Jan	KLM
16 Dec - 30 Dec	Turkish Airlines
25 Dec - 03 Jan	Aegean Airlines
30 Dec - 07 Jan	Turkish Airlines
27 Dec - 17 Jan	Lufthansa
16 Dec - 02 Jan	Turkish Airlines
18 Dec - 02 Jan	Turkish Airlines
22 Dec - 02 Jan	Turkish Airlines
26 Dec - 12 Jan	SWISS
17 Dec - 02 Jan	Turkish Airlines
20 Dec - 06 Jan	Turkish Airlines

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

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 December from 587€

Return flights