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

Return flights

01 Dec - 14 Dec	Ryanair
04 Dec - 15 Dec	Ryanair
01 Dec - 09 Dec	Ryanair
01 Dec - 16 Dec	Ryanair
06 Dec - 16 Dec	Aegean Airlines
06 Dec - 14 Dec	Aegean Airlines
02 Dec - 14 Dec	Ryanair
06 Dec - 13 Dec	easyJet
02 Dec - 16 Dec	Ryanair
06 Dec - 21 Dec	Aegean Airlines
12 Dec - 19 Jan	Ryanair
27 Dec - 11 Jan	Ryanair
26 Dec - 17 Jan	Ryanair
27 Dec - 10 Jan	Ryanair
25 Dec - 15 Jan	Vueling Airlines
26 Dec - 10 Jan	Ryanair
27 Dec - 06 Jan	Ryanair
27 Dec - 05 Jan	Ryanair
26 Dec - 15 Jan	Ryanair
27 Dec - 04 Jan	Ryanair

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 534€

Return flights