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

Return flights

29 Sep - 30 Oct	AJet
15 Sep - 29 Oct	AJet
17 Sep - 26 Oct	AJet
20 Sep - 28 Oct	AJet
20 Sep - 30 Oct	AJet
24 Sep - 29 Oct	AJet
29 Sep - 31 Oct	AJet
11 Sep - 18 Sep	Etihad Airways
12 Sep - 30 Oct	AJet
25 Sep - 02 Oct	Etihad Airways
09 Sep - 16 Sep	Etihad Airways
16 Sep - 23 Sep	Etihad Airways
17 Sep - 24 Sep	Etihad Airways
17 Sep - 30 Oct	AJet
11 Sep - 23 Sep	Etihad Airways
09 Sep - 23 Sep	Etihad Airways
11 Sep - 24 Sep	Etihad Airways
09 Sep - 17 Sep	Etihad Airways
17 Sep - 22 Sep	Etihad Airways
09 Sep - 24 Sep	Etihad Airways

Also check the deals for one-way flights from Frankfurt 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.

Book a cheap hotel in Bangkok

Cheap car rent in Bangkok

Cheapest return flights from Frankfurt to Bangkok in September from $546

Return flights