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

Return flights

07 Dec - 21 Dec	Iberia
02 Dec - 09 Dec	easyJet
04 Dec - 18 Dec	Iberia
01 Dec - 11 Dec	Ryanair
05 Dec - 08 Dec	Ryanair
06 Dec - 11 Dec	Ryanair
08 Dec - 22 Dec	Ryanair
05 Dec - 12 Dec	Ryanair
01 Dec - 15 Dec	Air Europa
01 Dec - 10 Dec	Ryanair
14 Dec - 15 Jan	Air Europa
28 Dec - 10 Jan	Vueling Airlines
21 Dec - 12 Jan	Qatar Airways
27 Dec - 11 Jan	Ryanair
01 Dec - 07 Jan	British Airways
02 Dec - 06 Jan	Turkish Airlines
28 Dec - 26 Jan	Turkish Airlines
28 Dec - 27 Jan	Turkish Airlines
27 Dec - 28 Jan	KLM
18 Dec - 06 Jan	Turkish Airlines

Also check the deals for one-way flights from Porto 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 Porto to Bangkok in December from 585€

Return flights