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

Return flights

14 Sep - 21 Sep	IndiGo
07 Sep - 04 Oct	China Southern
23 Sep - 07 Oct	Etihad Airways
15 Sep - 23 Sep	China Southern
07 Sep - 13 Sep	China Southern
08 Sep - 15 Sep	Oman Air
19 Sep - 27 Sep	Oman Air
21 Sep - 27 Sep	Oman Air
08 Sep - 22 Sep	Oman Air
17 Sep - 15 Oct	Oman Air
18 Sep - 29 Sep	Etihad Airways
29 Sep - 27 Oct	Air India
07 Sep - 19 Sep	Oman Air
25 Sep - 08 Oct	Oman Air
03 Sep - 22 Sep	Etihad Airways
25 Sep - 10 Oct	Oman Air
30 Sep - 04 Oct	Etihad Airways
22 Sep - 23 Oct	Emirates
30 Sep - 30 Oct	Etihad Airways
04 Sep - 04 Oct	China Southern

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 $643

Return flights