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

Return flights

14 May - 24 May	Scandinavian Airlines
12 May - 16 May	TAP
07 May - 14 May	Scandinavian Airlines
10 May - 17 May	Scandinavian Airlines
13 May - 06 Jun	TAP
04 May - 30 May	TAP
12 May - 16 May	TAP	direct
26 May - 20 Jun	Scandinavian Airlines
25 May - 20 Jun	SWISS
10 May - 17 May	United	direct
07 May - 14 May	United	direct
14 May - 24 May	United	direct
04 May - 30 May	Brussels Airlines	direct
13 May - 06 Jun	Brussels Airlines	direct

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

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 Newark to Porto in May from $426

Return flights