AirHint found the following cheapest return flights from Ljubljana (LJU) to New York (JFK) in September 2026 (see full year).

Return flights

18 Sep - 23 Sep	Air Serbia
17 Sep - 27 Sep	Air Serbia
22 Sep - 29 Sep	KLM
17 Sep - 25 Sep	KLM
18 Sep - 28 Sep	KLM
18 Sep - 27 Sep	KLM
16 Sep - 29 Sep	Air France
16 Sep - 30 Sep	Delta
02 Sep - 16 Sep	KLM
21 Sep - 28 Sep	Delta
26 Sep - 04 Oct	Air France

Also check the deals for one-way flights from Ljubljana to New York 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 Ljubljana to New York in September from 515€

Return flights