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

Return flights

01 Dec - 08 Dec	KLM
03 Dec - 10 Dec	KLM
02 Dec - 09 Dec	KLM
09 Dec - 16 Dec	KLM
08 Dec - 15 Dec	Pegasus Airlines
05 Dec - 09 Dec	KLM
06 Dec - 13 Dec	Pegasus Airlines
07 Dec - 14 Dec	KLM
04 Dec - 11 Dec	KLM
10 Dec - 17 Dec	Ryanair
29 Dec - 11 Jan	Ryanair
29 Dec - 10 Jan	Ryanair
28 Dec - 12 Jan	Ryanair
25 Dec - 12 Jan	Pegasus Airlines
26 Dec - 12 Jan	TAP
29 Dec - 08 Jan	easyJet
25 Dec - 01 Jan	Pegasus Airlines
30 Dec - 06 Jan	Pegasus Airlines
27 Dec - 10 Jan	Ryanair
29 Dec - 05 Jan	Ryanair

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 597€

Return flights