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

Return flights

26 Sep - 28 Oct	Condor	direct
27 Sep - 29 Sep	Condor	direct
12 Sep - 21 Sep	Condor	direct
04 Sep - 07 Sep	Condor	direct
11 Sep - 14 Sep	Condor	direct
11 Sep - 15 Sep	Condor	direct
18 Sep - 21 Sep	Condor	direct
25 Sep - 28 Sep	Condor	direct
25 Sep - 29 Sep	Condor	direct
26 Sep - 28 Sep	Condor	direct
26 Sep - 29 Sep	Condor	direct
24 Sep - 08 Oct	Lufthansa	direct
24 Sep - 02 Oct	Lufthansa	direct
16 Sep - 24 Oct	Lufthansa	direct
27 Sep - 04 Oct	Lufthansa	direct
06 Sep - 04 Oct	Lufthansa	direct
30 Sep - 03 Oct	Condor	direct
29 Sep - 01 Oct	Condor	direct

Also check the deals for one-way flights from Frankfurt to Berlin 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 Frankfurt to Berlin in September from 117€

Return flights