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

Return flights

11 Sep - 28 Sep	Air Europa
30 Sep - 31 Oct	Ryanair
15 Sep - 29 Sep	Wizz Air
22 Sep - 29 Sep	Ryanair
29 Sep - 06 Oct	Ryanair
15 Sep - 23 Sep	Ryanair
02 Sep - 29 Oct	Air Europa
22 Sep - 06 Oct	Ryanair
23 Sep - 15 Oct	Air Europa
17 Sep - 29 Sep	Wizz Air Malta
26 Sep - 10 Oct	Air Europa
27 Sep - 04 Oct	Air Europa
15 Sep - 22 Sep	Ryanair
09 Sep - 23 Sep	Air Europa
12 Sep - 28 Sep	Ryanair
26 Sep - 03 Oct	Air Europa
12 Sep - 23 Sep	Air Europa
18 Sep - 22 Sep	TAP
29 Sep - 31 Oct	Ryanair
13 Sep - 01 Oct	TAP

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 556€

Return flights