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

Return flights

24 Aug - 08 Sep	Ryanair
28 Aug - 08 Sep	easyJet
29 Aug - 13 Sep	Ryanair
30 Aug - 13 Sep	Ryanair
27 Aug - 18 Sep	KLM
22 Aug - 04 Sep	Norwegian
25 Aug - 10 Sep	KLM
10 Aug - 03 Sep	transavia
16 Aug - 09 Sep	Ryanair
21 Aug - 08 Sep	KLM
05 Aug - 18 Aug	Ryanair
13 Aug - 20 Aug	Wizz Air Malta
19 Aug - 26 Aug	Ryanair
12 Aug - 20 Aug	Ryanair
12 Aug - 19 Aug	Turkish Airlines
05 Aug - 15 Aug	Ryanair
20 Aug - 30 Aug	Ryanair
02 Aug - 13 Aug	Ryanair
07 Aug - 29 Aug	Ryanair
19 Aug - 29 Aug	Aegean Airlines

Also check the deals for one-way flights from Porto to Bangkok in August.

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 August from 760€

Return flights