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

Return flights

30 Sep - 25 Oct	Spirit Airlines
23 Sep - 30 Sep	Spirit Airlines
25 Sep - 29 Sep	Turkish Airlines
29 Sep - 25 Oct	Scandinavian Airlines
24 Sep - 29 Sep	Condor
23 Sep - 18 Oct	Frontier Airlines
24 Sep - 05 Oct	Spirit Airlines
24 Sep - 18 Oct	Frontier Airlines
25 Sep - 18 Oct	Spirit Airlines
26 Sep - 18 Oct	Spirit Airlines
29 Sep - 25 Oct	Air France	direct
30 Sep - 25 Oct	Air France	direct
20 Sep - 11 Oct	Spirit Airlines
25 Sep - 29 Sep	Air France	direct
23 Sep - 30 Sep	Lufthansa	direct
24 Sep - 29 Sep	Delta	direct
21 Sep - 28 Sep	Air France	direct

Also check the deals for one-way flights from Atlanta 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 Atlanta to Frankfurt in September from $709

Return flights