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

Return flights

14 Sep - 29 Sep	Oman Air
19 Sep - 25 Sep	Oman Air
17 Sep - 24 Sep	Oman Air
12 Sep - 19 Sep	Oman Air
24 Sep - 22 Oct	Oman Air
12 Sep - 26 Sep	Oman Air
21 Sep - 03 Oct	Oman Air
18 Sep - 23 Sep	Air India
16 Sep - 30 Sep	Air India
21 Sep - 30 Sep	Air India
21 Sep - 28 Sep	Air India
01 Sep - 29 Sep	Oman Air
16 Sep - 01 Oct	Oman Air
17 Sep - 06 Oct	Air India
15 Sep - 15 Oct	Air India
25 Sep - 28 Oct	Etihad Airways
28 Sep - 05 Oct	Air India
27 Sep - 08 Oct	Etihad Airways
27 Sep - 04 Oct	Turkmenistan Airlines
01 Sep - 06 Oct	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 $687

Return flights