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

Return flights

18 Sep - 23 Sep	Ryanair
30 Sep - 06 Oct	easyJet
17 Sep - 23 Sep	Ryanair
30 Sep - 03 Oct	easyJet
18 Sep - 25 Sep	Air Europa
25 Sep - 01 Oct	Vueling Airlines
22 Sep - 29 Oct	Air Europa
09 Sep - 21 Sep	SWISS
12 Sep - 21 Sep	SWISS
16 Sep - 22 Sep	Ryanair
19 Sep - 09 Oct	SWISS
11 Sep - 25 Sep	easyJet
12 Sep - 15 Sep	SWISS
17 Sep - 26 Sep	SWISS
22 Sep - 01 Oct	easyJet
26 Sep - 03 Oct	SWISS
03 Sep - 10 Sep	SWISS
22 Sep - 10 Oct	SWISS
29 Sep - 04 Oct	Air Europa
29 Sep - 03 Oct	Air Europa

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 399€

Return flights