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

Return flights

28 Aug - 31 Aug	SWISS
28 Aug - 11 Sep	SWISS
27 Aug - 03 Sep	SWISS
27 Aug - 05 Sep	SWISS
28 Aug - 06 Sep	SWISS
27 Aug - 31 Aug	SWISS
30 Aug - 06 Sep	KLM
28 Aug - 10 Sep	SWISS
30 Aug - 09 Sep	Delta
25 Aug - 01 Sep	SWISS
24 Aug - 31 Aug	British Airways
25 Aug - 02 Sep	SWISS
29 Aug - 06 Sep	Delta
22 Aug - 28 Aug	Norwegian
20 Aug - 26 Aug	SWISS
06 Aug - 13 Aug	KLM
20 Aug - 27 Aug	SWISS
10 Aug - 24 Aug	British Airways
02 Aug - 09 Aug	British Airways
15 Aug - 24 Aug	British Airways

Also check the deals for one-way flights from Porto to New York in August.

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 August from $512

Return flights