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

Return flights

09 Sep - 30 Oct	Wizz Air Malta
24 Sep - 27 Oct	Wizz Air Malta
30 Sep - 26 Oct	easyJet
24 Sep - 06 Oct	Wizz Air Malta
22 Sep - 29 Sep	Wizz Air
30 Sep - 07 Oct	Ryanair
16 Sep - 23 Sep	Air Europa
24 Sep - 02 Oct	Wizz Air Malta
12 Sep - 19 Sep	Air Europa
24 Sep - 01 Oct	easyJet
16 Sep - 01 Oct	Aegean Airlines
29 Sep - 06 Oct	Wizz Air Malta
19 Sep - 04 Oct	easyJet
22 Sep - 27 Sep	Wizz Air
18 Sep - 25 Sep	easyJet
17 Sep - 24 Sep	Air Europa
12 Sep - 21 Sep	Wizz Air
11 Sep - 18 Sep	easyJet
23 Sep - 30 Sep	Air Europa
21 Sep - 28 Sep	Wizz Air

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

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 September from $622

Return flights