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

Return flights

22 Sep - 29 Sep	Air Canada
24 Sep - 29 Sep	Air Canada
23 Sep - 30 Sep	Air Canada
24 Sep - 01 Oct	Air Canada
29 Sep - 06 Oct	Air Canada
22 Sep - 26 Sep	Air Canada
29 Sep - 08 Oct	Air Canada
20 Sep - 14 Oct	Air Canada
21 Sep - 07 Oct	Air Canada
29 Sep - 07 Oct	Air Canada
17 Sep - 22 Sep	Air Canada
17 Sep - 24 Sep	SWISS
10 Sep - 17 Sep	Air Canada
01 Sep - 16 Sep	Air Canada
09 Sep - 16 Sep	Air Canada
10 Sep - 24 Sep	Air Canada
26 Sep - 13 Oct	Icelandair
28 Sep - 08 Oct	American Airlines
06 Sep - 02 Oct	TAP
03 Sep - 15 Oct	TAP

Also check the deals for one-way flights from Newark 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 Newark to Barcelona in September from $328

Return flights