AirHint found the following cheapest return flights from Porto (OPO) to New York (JFK) in September 2025 (see full year).

Return flights

24 Sep - 29 Sep	KLM
24 Sep - 30 Sep	KLM
26 Sep - 04 Oct	Delta
25 Sep - 28 Sep	Iberia
24 Sep - 28 Sep	Iberia
26 Sep - 02 Oct	Air France
29 Sep - 20 Oct	KLM
25 Sep - 30 Sep	KLM
25 Sep - 04 Oct	KLM
22 Sep - 26 Sep	Air Europa
22 Sep - 03 Oct	Air Europa
30 Sep - 21 Oct	SWISS
26 Sep - 28 Sep	Delta
30 Sep - 14 Oct	SWISS
25 Sep - 29 Sep	Air Canada
25 Sep - 09 Oct	Air Europa
26 Sep - 03 Oct	Air Europa
18 Sep - 21 Sep	Air Europa
29 Sep - 13 Oct	SWISS
20 Sep - 25 Sep	KLM

Also check the deals for one-way flights from Porto 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 Porto to New York in September from $503

Return flights