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

Return flights

28 Aug - 08 Sep	Air Canada
28 Aug - 31 Aug	Air Canada
26 Aug - 02 Sep	Brussels Airlines
28 Aug - 03 Sep	Air Canada
27 Aug - 03 Sep	United
25 Aug - 01 Sep	United	direct
25 Aug - 02 Sep	Delta
29 Aug - 09 Sep	Delta
29 Aug - 01 Sep	Delta
27 Aug - 02 Sep	United
27 Aug - 31 Aug	United	direct
27 Aug - 31 Aug	Scandinavian Airlines
25 Aug - 31 Aug	United	direct
20 Aug - 25 Aug	Brussels Airlines	direct
12 Aug - 26 Aug	Brussels Airlines
21 Aug - 28 Aug	Brussels Airlines
21 Aug - 27 Aug	Brussels Airlines
30 Aug - 06 Sep	Lufthansa
18 Aug - 28 Aug	Delta
20 Aug - 28 Aug	Delta

Also check the deals for one-way flights from Porto to Newark 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 Newark in August from 452€

Return flights