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

Return flights

30 Sep - 28 Oct	IndiGo
24 Sep - 26 Oct	Wizz Air
23 Sep - 28 Oct	AJet
21 Sep - 28 Sep	Pegasus Airlines
30 Sep - 21 Oct	IndiGo
28 Sep - 29 Oct	Turkish Airlines
29 Sep - 28 Oct	AJet
28 Sep - 07 Oct	AJet
30 Sep - 14 Oct	Pegasus Airlines
29 Sep - 29 Oct	AJet
30 Sep - 29 Oct	Turkish Airlines
23 Sep - 30 Sep	Pegasus Airlines
24 Sep - 30 Sep	Pegasus Airlines
22 Sep - 30 Sep	Pegasus Airlines
25 Sep - 30 Sep	Pegasus Airlines
21 Sep - 30 Sep	Pegasus Airlines
23 Sep - 29 Sep	Pegasus Airlines
18 Sep - 25 Sep	AJet
22 Sep - 29 Sep	Pegasus Airlines
19 Sep - 26 Sep	IndiGo

Also check the deals for one-way flights from Brussels 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 Brussels to Bangkok in September from $486

Return flights