AirHint found the following cheapest return flights from Raleigh-durham (RDU) to Frankfurt (FRA) in September 2025 (see full year).

Return flights

23 Sep - 30 Sep	Condor
10 Sep - 16 Sep	Condor
29 Sep - 16 Oct	jetBlue
21 Sep - 26 Sep	Spirit Airlines
11 Sep - 15 Sep	Frontier Airlines
12 Sep - 15 Sep	Condor
09 Sep - 15 Sep	Frontier Airlines
08 Sep - 15 Sep	Condor
13 Sep - 27 Sep	Frontier Airlines
15 Sep - 25 Sep	Lufthansa
29 Sep - 06 Oct	Icelandair
27 Sep - 04 Oct	Icelandair
25 Sep - 02 Oct	Icelandair
29 Sep - 16 Oct	Lufthansa	direct
29 Sep - 06 Oct	Lufthansa	direct
13 Sep - 27 Sep	Lufthansa	direct
25 Sep - 02 Oct	Lufthansa	direct
27 Sep - 04 Oct	Lufthansa	direct

Also check the deals for one-way flights from Raleigh-durham 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 Raleigh-durham to Frankfurt in September from $598

Return flights