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

Return flights

14 Aug - 28 Aug	Finnair
13 Aug - 27 Aug	Finnair
20 Aug - 28 Aug	Finnair
24 Aug - 30 Aug	Finnair
23 Aug - 30 Aug	IndiGo
21 Aug - 02 Sep	Finnair
26 Aug - 16 Sep	IndiGo
17 Aug - 24 Aug	Finnair
03 Aug - 06 Sep	SWISS
03 Aug - 13 Aug	Emirates
08 Aug - 17 Aug	Emirates
27 Aug - 04 Sep	TAP
23 Aug - 05 Sep	TAP

Also check the deals for one-way flights from Bangkok to Lisbon 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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon

Cheapest return flights from Bangkok to Lisbon in August from 822€

Return flights