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

Return flights

10 Dec - 22 Jan	easyJet
02 Dec - 09 Dec	TAP
02 Dec - 28 Jan	Finnair
03 Dec - 28 Jan	Finnair
31 Dec - 14 Jan	Vueling Airlines
05 Dec - 08 Dec	easyJet
07 Dec - 14 Dec	SKY express
01 Dec - 09 Dec	Finnair
05 Dec - 12 Dec	Ryanair
01 Dec - 31 Jan	Finnair
11 Dec - 22 Jan	TAP
08 Dec - 12 Dec	Air France
05 Dec - 21 Dec	KLM
05 Dec - 16 Dec	Air France
04 Dec - 15 Jan	Finnair
06 Dec - 16 Dec	Air France
01 Dec - 15 Jan	Finnair
06 Dec - 27 Dec	easyJet
23 Dec - 10 Jan	Ryanair
28 Dec - 15 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 625€

Return flights