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

Return flights

01 Dec - 13 Dec	Vueling Airlines
07 Dec - 20 Dec	Vueling Airlines
05 Dec - 16 Dec	Air Europa
02 Dec - 17 Dec	Air France
05 Dec - 11 Dec	Qatar Airways
18 Dec - 12 Jan	Vueling Airlines
06 Dec - 21 Dec	Turkish Airlines
06 Dec - 12 Dec	Turkish Airlines
01 Dec - 10 Dec	British Airways
01 Dec - 15 Dec	British Airways
05 Dec - 08 Dec	TAP
26 Dec - 02 Jan	TAP
26 Dec - 04 Jan	TAP
25 Dec - 04 Jan	Vueling Airlines
22 Dec - 14 Jan	Turkish Airlines
25 Dec - 07 Jan	KLM
27 Dec - 10 Jan	Turkish Airlines
26 Dec - 09 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 617€

Return flights