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

Return flights

16 Sep - 19 Sep	Condor	direct
28 Sep - 01 Oct	Condor	direct
17 Sep - 24 Sep	Condor	direct
14 Sep - 17 Sep	Condor	direct
21 Sep - 27 Sep	Condor	direct
11 Sep - 13 Sep	Condor	direct
07 Sep - 09 Sep	Condor	direct
14 Sep - 18 Sep	Condor	direct
20 Sep - 27 Sep	Condor	direct
02 Sep - 15 Sep	Condor	direct
11 Sep - 18 Sep	Condor	direct
30 Sep - 01 Oct	Condor	direct
30 Sep - 07 Oct	Condor	direct
28 Sep - 03 Oct	Condor	direct
30 Sep - 04 Oct	Condor	direct
26 Sep - 03 Oct	Condor	direct
30 Sep - 06 Oct	Condor	direct
25 Sep - 02 Oct	Condor	direct
27 Sep - 01 Oct	Condor	direct
27 Sep - 04 Oct	Condor	direct

Also check the deals for one-way flights from Frankfurt to Prague 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 Prague in September from $151

Return flights