AirHint found the following cheapest return flights from Basel (BSL) to Bangkok (DMK) in September 2025 (see full year).

Return flights

19 Sep - 02 Oct	Pegasus Airlines
23 Sep - 01 Oct	Pegasus Airlines
26 Sep - 14 Oct	Pegasus Airlines
30 Sep - 10 Oct	Pegasus Airlines
29 Sep - 10 Oct	AJet
26 Sep - 07 Oct	Pegasus Airlines
24 Sep - 27 Sep	AJet
24 Sep - 06 Oct	AJet
17 Sep - 05 Oct	Pegasus Airlines
08 Sep - 09 Sep	easyJet
11 Sep - 18 Sep	Turkish Airlines
21 Sep - 28 Sep	flydubai
10 Sep - 22 Sep	Turkish Airlines
17 Sep - 03 Oct	Turkish Airlines
09 Sep - 09 Oct	Turkish Airlines
09 Sep - 16 Sep	Air France
12 Sep - 19 Sep	Turkish Airlines
22 Sep - 26 Sep	Turkish Airlines

Also check the deals for one-way flights from Basel 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 Basel to Bangkok in September from $640

Return flights