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

Return flights

23 Sep - 07 Oct	SWISS
07 Sep - 23 Sep	SWISS
23 Sep - 30 Sep	SWISS
22 Sep - 29 Sep	SWISS
19 Sep - 23 Sep	LOT
18 Sep - 22 Sep	LOT
18 Sep - 23 Sep	LOT
22 Sep - 26 Sep	Norse Atlantic Airways (UK)
13 Sep - 17 Sep	Norse Atlantic Airways (UK)
05 Sep - 07 Sep	SWISS
18 Sep - 11 Oct	Iberia
17 Sep - 22 Sep	Norse Atlantic Airways (UK)
17 Sep - 11 Oct	FrenchBee
09 Sep - 04 Oct	LOT
10 Sep - 20 Oct	Austrian Airlines

Also check the deals for one-way flights from New York to Bucharest 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 Bucharest in September from $478

Return flights