Cheapest return EWR–OPO flights, September

AirHint found the following cheapest return flights from Newark (EWR) to Porto (OPO) in September 2026 (see full year).

Return flights

01 Sep - 08 Sep TAP
02 Sep - 09 Sep Air Canada
09 Sep - 13 Sep Iberia
13 Sep - 16 Oct Turkish Airlines
01 Sep - 08 Sep United direct
02 Sep - 09 Sep United direct
14 Sep - 19 Sep FrenchBee
05 Sep - 13 Sep FrenchBee
24 Sep - 27 Sep Iberia
27 Sep - 10 Oct Iberia
09 Sep - 13 Sep United direct
05 Sep - 15 Sep Delta
13 Sep - 16 Oct United direct
27 Sep - 10 Oct Brussels Airlines direct

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

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