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	United
27 Aug - 03 Sep	United
28 Aug - 04 Sep	Delta
29 Aug - 03 Sep	United	direct
28 Aug - 08 Sep	Brussels Airlines	direct
29 Aug - 07 Sep	United
30 Aug - 06 Sep	United	direct
25 Aug - 31 Aug	Delta
27 Aug - 03 Sep	Lufthansa	direct
30 Aug - 09 Sep	Lufthansa
26 Aug - 04 Sep	Vueling Airlines
27 Aug - 31 Aug	United	direct
28 Aug - 31 Aug	Delta
28 Aug - 31 Aug	United	direct
29 Aug - 29 Aug	Transavia France
22 Aug - 31 Aug	KLM
22 Aug - 30 Aug	Delta
25 Aug - 30 Aug	Ryanair
24 Aug - 27 Aug	easyJet
23 Aug - 31 Aug	Air Europa

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 485€

Return flights