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

Return flights

27 Aug - 31 Aug	TAP
18 Aug - 25 Aug	TAP
28 Aug - 08 Sep	United
26 Aug - 31 Aug	TAP
27 Aug - 31 Aug	United	direct
25 Aug - 31 Aug	TAP
19 Aug - 26 Aug	TAP
20 Aug - 25 Aug	TAP
29 Aug - 01 Sep	SWISS
25 Aug - 02 Sep	Delta
19 Aug - 24 Aug	Ryanair
12 Aug - 25 Aug	Delta
21 Aug - 27 Aug	United
30 Aug - 07 Sep	TAP
22 Aug - 01 Sep	Brussels Airlines	direct
29 Aug - 01 Sep	Brussels Airlines	direct
28 Aug - 08 Sep	Brussels Airlines	direct
31 Aug - 08 Sep	SWISS
25 Aug - 01 Sep	Brussels Airlines	direct
31 Aug - 09 Sep	Brussels Airlines	direct

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 $499

Return flights