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

Return flights

20 Sep - 03 Oct	Air Canada
30 Sep - 07 Oct	Air Canada
28 Sep - 14 Oct	Air Canada
29 Sep - 09 Oct	Air Canada
29 Sep - 06 Oct	Air Canada
30 Sep - 09 Oct	Air Canada
30 Sep - 10 Oct	Iberia	direct
29 Sep - 09 Oct	United	direct
23 Sep - 30 Sep	United
28 Sep - 08 Oct	Lufthansa
29 Sep - 07 Oct	Austrian Airlines
24 Sep - 30 Sep	Lufthansa
17 Sep - 23 Sep	SWISS
21 Sep - 30 Sep	SWISS
22 Sep - 29 Sep	Austrian Airlines
17 Sep - 24 Sep	SWISS
17 Sep - 25 Sep	British Airways
17 Sep - 29 Sep	SWISS
19 Sep - 26 Sep	Brussels Airlines
20 Sep - 30 Sep	Lufthansa

Also check the deals for one-way flights from New York to Barcelona 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 Barcelona in September from 276€

Return flights