AirHint found the following cheapest return flights from Porto (OPO) to Bangkok (BKK) in March 2026 (see full year).

Return flights

30 Mar - 21 Apr	SWISS
04 Mar - 18 Mar	Qatar Airways
30 Mar - 20 Apr	SWISS
26 Mar - 20 Apr	Lufthansa
07 Mar - 21 Mar	Qatar Airways
29 Mar - 15 Apr	SWISS
24 Mar - 15 Apr	SWISS
25 Mar - 15 Apr	SWISS
30 Mar - 15 Apr	SWISS
26 Mar - 15 Apr	Lufthansa
02 Mar - 20 Mar	Turkish Airlines
08 Mar - 21 Mar	Turkish Airlines
30 Mar - 19 Apr	Turkish Airlines
28 Mar - 04 Apr	Vueling Airlines

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

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 March from 675€

Return flights