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

Return flights

13 May - 25 May	SWISS
16 May - 01 Jun	SWISS
16 May - 02 Jun	SWISS
16 May - 03 Jun	SWISS
15 May - 01 Jun	SWISS
11 May - 21 May	Ryanair
21 May - 31 May	SWISS
16 May - 31 May	Lufthansa
15 May - 31 May	Lufthansa
13 May - 24 May	Ryanair
13 May - 22 May	SWISS
07 May - 14 May	Ryanair
13 May - 23 May	Ryanair
28 May - 11 Jun	SWISS
15 May - 24 May	Lufthansa
30 May - 09 Jun	Ryanair
30 May - 12 Jun	Ryanair
29 May - 12 Jun	Ryanair
31 May - 12 Jun	Ryanair
29 May - 10 Jun	SWISS

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

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 May from 590€

Return flights