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

Return flights

14 Sep - 26 Sep	Air France
23 Sep - 07 Oct	KLM
17 Sep - 23 Sep	Delta
30 Sep - 25 Oct	Air France
29 Sep - 25 Oct	Air France
25 Sep - 08 Oct	Delta
10 Sep - 23 Sep	Air France
25 Sep - 09 Oct	Air France
26 Sep - 29 Sep	Air France
19 Sep - 26 Sep	Delta
21 Sep - 09 Oct	Air France
27 Sep - 18 Oct	Air France
09 Sep - 19 Sep	KLM
10 Sep - 24 Sep	Air France
08 Sep - 15 Sep	Air France
28 Sep - 02 Oct	Air France
29 Sep - 02 Oct	Air France
08 Sep - 11 Sep	Air France

Also check the deals for one-way flights from Dallas 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 Dallas to Frankfurt in September from $578

Return flights