AirHint found the following cheapest return flights from Brussels (BRU) to Bangkok (BKK) in September 2026 (see full year).

Return flights

07 Sep - 21 Sep	SWISS
10 Sep - 30 Sep	SWISS
10 Sep - 17 Sep	SWISS
01 Sep - 15 Sep	SWISS
01 Sep - 22 Sep	SWISS
02 Sep - 09 Sep	SWISS
16 Sep - 23 Sep	SWISS
04 Sep - 20 Sep	SWISS
01 Sep - 01 Oct	SWISS
01 Sep - 18 Sep	SWISS
01 Sep - 13 Sep	Finnair
23 Sep - 10 Oct	SWISS
28 Sep - 11 Oct	SWISS
26 Sep - 08 Oct	SWISS
30 Sep - 15 Oct	Qatar Airways
25 Sep - 03 Oct	SWISS
28 Sep - 11 Oct	Thai Airways	direct
26 Sep - 08 Oct	Thai Airways	direct
23 Sep - 10 Oct	Thai Airways	direct
25 Sep - 03 Oct	Thai Airways	direct

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 520€

Return flights