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

Return flights

11 Sep - 16 Sep	Lufthansa
19 Sep - 07 Oct	SWISS
19 Sep - 21 Sep	SWISS
20 Sep - 28 Sep	SWISS
09 Sep - 14 Sep	Air Europa
04 Sep - 08 Sep	SWISS
20 Sep - 26 Sep	SWISS
11 Sep - 15 Sep	Lufthansa
11 Sep - 20 Sep	Lufthansa
25 Sep - 29 Sep	SWISS
23 Sep - 28 Sep	SWISS
25 Sep - 05 Oct	SWISS
19 Sep - 09 Oct	SWISS
18 Sep - 02 Oct	SWISS
30 Sep - 06 Oct	Ryanair
20 Sep - 04 Oct	Brussels Airlines
29 Sep - 05 Oct	SWISS
27 Sep - 04 Oct	SWISS
09 Sep - 09 Oct	Lufthansa
21 Sep - 08 Oct	SWISS

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 420€

Return flights