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

Return flights

31 Oct - 06 Nov	Scandinavian Airlines
22 Oct - 26 Oct	Scandinavian Airlines
08 Oct - 20 Oct	Delta
24 Oct - 28 Oct	KLM
18 Oct - 26 Oct	Ryanair
21 Oct - 28 Oct	Delta
29 Oct - 05 Nov	Delta
29 Oct - 03 Nov	Delta
16 Oct - 26 Oct	Ryanair
16 Oct - 07 Nov	Delta
30 Oct - 08 Nov	KLM
29 Oct - 02 Nov	SWISS
23 Oct - 27 Oct	Delta
30 Oct - 04 Nov	Delta
23 Oct - 13 Nov	KLM
30 Oct - 15 Nov	Delta
14 Oct - 20 Oct	Ryanair
09 Oct - 13 Oct	Lufthansa
31 Oct - 06 Nov	Brussels Airlines	direct
16 Oct - 22 Oct	Ryanair

Also check the deals for one-way flights from Porto to Newark in October.

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 October from 423€

Return flights