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

Return flights

01 Dec - 10 Dec	easyJet
10 Dec - 17 Dec	easyJet
15 Dec - 29 Dec	Lufthansa
30 Dec - 12 Jan	Lufthansa
15 Dec - 22 Dec	easyJet
13 Dec - 20 Dec	easyJet
14 Dec - 21 Dec	Turkish Airlines
08 Dec - 08 Jan	SWISS
10 Dec - 08 Jan	SWISS
28 Dec - 17 Jan	SKY express
26 Dec - 17 Jan	Lufthansa
26 Dec - 12 Jan	Lufthansa
28 Dec - 18 Jan	Lufthansa
18 Dec - 02 Jan	Turkish Airlines
25 Dec - 10 Jan	Turkish Airlines
26 Dec - 10 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 604€

Return flights