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

Return flights

05 May - 18 May	Vueling Airlines
02 May - 29 May	Vueling Airlines
15 May - 29 May	SWISS
15 May - 25 May	SWISS
04 May - 25 May	SWISS
15 May - 26 May	SWISS
21 May - 02 Jun	SWISS
13 May - 26 May	SWISS
20 May - 02 Jun	SWISS
06 May - 14 May	easyJet
08 May - 29 May	SWISS
16 May - 31 May	easyJet
30 May - 19 Jun	Finnair
22 May - 05 Jun	Finnair
23 May - 05 Jun	Finnair
28 May - 12 Jun	Finnair
31 May - 16 Jun	Finnair
30 May - 16 Jun	Finnair
03 May - 02 Jun	SWISS
23 May - 06 Jun	Finnair

Also check the deals for one-way flights from Lisbon 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 Lisbon to Bangkok in May from 546€

Return flights