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

Return flights

05 May - 11 May	Lufthansa
04 May - 21 May	SWISS
02 May - 08 May	SWISS
04 May - 10 May	SWISS
05 May - 12 May	United
08 May - 13 May	SWISS
04 May - 13 May	SWISS
06 May - 13 May	SWISS
04 May - 18 May	United
05 May - 15 May	Lufthansa
27 May - 03 Jun	SWISS
29 May - 12 Jun	Lufthansa
29 May - 12 Jun	TAP	direct

Also check the deals for one-way flights from Lisbon to Newark 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 Lisbon to Newark in May from 443€

Return flights