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

Return flights

02 May - 10 May	Iberia
15 May - 22 May	Iberia
05 May - 25 May	Iberia
12 May - 21 May	Iberia
08 May - 25 May	Iberia
09 May - 25 May	Iberia
13 May - 23 May	Finnair
13 May - 19 May	Finnair
14 May - 17 May	Iberia
14 May - 18 May	Iberia
17 May - 09 Jun	Iberia
31 May - 30 Jun	Iberia
30 May - 08 Jun	Iberia
24 May - 09 Jun	Iberia
27 May - 04 Jun	Iberia
27 May - 05 Jun	Iberia
26 May - 09 Jun	Iberia
21 May - 01 Jun	SWISS
27 May - 04 Jun	United	direct
29 May - 07 Jun	Iberia

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

Return flights