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

Return flights

12 Sep - 24 Sep	China Southern
26 Sep - 01 Oct	China Southern
19 Sep - 01 Oct	China Southern
12 Sep - 02 Oct	China Southern
19 Sep - 08 Oct	China Southern
19 Sep - 02 Oct	China Southern
26 Sep - 08 Oct	China Southern
12 Sep - 08 Oct	China Southern
10 Sep - 17 Sep	KLM
11 Sep - 18 Sep	KLM
12 Sep - 21 Sep	KLM
18 Sep - 01 Oct	KLM
23 Sep - 30 Sep	Ryanair
22 Sep - 05 Oct	Ryanair
19 Sep - 21 Sep	KLM
17 Sep - 23 Sep	Ryanair
11 Sep - 25 Sep	KLM
09 Sep - 22 Sep	KLM
13 Sep - 04 Oct	easyJet
11 Sep - 28 Sep	Ryanair

Also check the deals for one-way flights from Luxemburg 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 Luxemburg to Bangkok in September from $520

Return flights