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

Return flights

10 Dec - 19 Dec	Air France
10 Dec - 22 Jan	Air France
05 Dec - 24 Jan	Air France
06 Dec - 18 Dec	KLM
02 Dec - 16 Dec	SWISS
01 Dec - 15 Dec	SWISS
04 Dec - 16 Dec	SWISS
01 Dec - 11 Dec	SWISS
02 Dec - 22 Dec	SWISS
11 Dec - 29 Dec	Air France
05 Dec - 27 Dec	Air France
07 Dec - 22 Dec	Air France
30 Dec - 13 Jan	Turkish Airlines
30 Dec - 15 Jan	Air France
27 Dec - 15 Jan	Air France
13 Dec - 01 Jan	Qatar Airways
13 Dec - 11 Jan	Air France
28 Dec - 26 Jan	Turkish Airlines
25 Dec - 08 Jan	Finnair
13 Dec - 10 Jan	Finnair

Also check the deals for one-way flights from Lisbon to Bangkok 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 Bangkok in December from $811

Return flights