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

Return flights

04 Aug - 20 Aug	KLM
04 Aug - 29 Sep	China Eastern
05 Aug - 06 Sep	KLM
09 Aug - 16 Aug	Thai AirAsia
01 Aug - 31 Aug	Air France
12 Aug - 15 Aug	IndiGo
09 Aug - 24 Aug	Finnair
03 Aug - 06 Sep	SWISS
26 Aug - 16 Sep	Emirates
08 Aug - 17 Aug	Emirates
03 Aug - 13 Aug	Emirates
19 Aug - 25 Aug	TAP
05 Aug - 11 Aug	TAP
17 Aug - 30 Aug	Emirates

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.

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Cheapest return flights from Bangkok to Lisbon in August from 747€

Return flights