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

Return flights

21 Sep - 28 Sep	Etihad Airways
22 Sep - 25 Sep	Etihad Airways
22 Sep - 07 Oct	Etihad Airways
22 Sep - 29 Sep	Etihad Airways
22 Sep - 08 Oct	Etihad Airways
30 Sep - 07 Oct	IndiGo
26 Sep - 08 Oct	IndiGo
18 Sep - 25 Sep	Etihad Airways
28 Sep - 14 Oct	IndiGo
18 Sep - 06 Oct	Etihad Airways
23 Sep - 30 Sep	Etihad Airways
21 Sep - 25 Sep	Etihad Airways
25 Sep - 28 Sep	IndiGo
25 Sep - 09 Oct	IndiGo
27 Sep - 04 Oct	IndiGo
23 Sep - 22 Oct	IndiGo
23 Sep - 28 Oct	IndiGo
20 Sep - 25 Sep	Turkmenistan Airlines
19 Sep - 26 Sep	Air India
18 Sep - 26 Sep	Etihad Airways

Also check the deals for one-way flights from Bangkok to Frankfurt 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 Bangkok to Frankfurt in September from $589

Return flights