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

Return flights

04 Oct - 24 Oct	SWISS
27 Oct - 20 Nov	SWISS
03 Oct - 20 Oct	SWISS
02 Oct - 30 Oct	SWISS
04 Oct - 23 Oct	SWISS
01 Oct - 13 Oct	SWISS
22 Oct - 10 Nov	SWISS
23 Oct - 10 Nov	SWISS
03 Oct - 12 Oct	SWISS
23 Oct - 23 Nov	SWISS
29 Oct - 16 Nov	SWISS
29 Oct - 17 Nov	SWISS
13 Oct - 24 Oct	SWISS
23 Oct - 30 Oct	Ryanair
04 Oct - 18 Oct	SWISS
30 Oct - 16 Nov	SWISS
30 Oct - 17 Nov	SWISS
12 Oct - 24 Oct	SWISS
17 Oct - 01 Nov	SWISS
18 Oct - 01 Nov	SWISS

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

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 October from 594€

Return flights