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

Return flights

17 Sep - 30 Sep	TAP
13 Sep - 22 Sep	TAP
17 Sep - 24 Sep	TAP
06 Sep - 22 Sep	TAP
14 Sep - 20 Sep	TAP
02 Sep - 16 Sep	TAP
03 Sep - 17 Sep	TAP
23 Sep - 07 Oct	TAP
09 Sep - 17 Sep	TAP
23 Sep - 30 Sep	TAP
18 Sep - 25 Sep	TAP
24 Sep - 03 Oct	TAP
19 Sep - 06 Oct	Singapore Airlines	direct
19 Sep - 05 Oct	TAP
19 Sep - 05 Oct	Singapore Airlines	direct
24 Sep - 01 Oct	Lufthansa	direct
23 Sep - 07 Oct	Lufthansa	direct
24 Sep - 03 Oct	Lufthansa	direct
27 Sep - 04 Oct	Lufthansa	direct

Also check the deals for one-way flights from New York 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 New York to Frankfurt in September from $451

Return flights