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

Return flights

06 May - 10 May	Icelandair
09 May - 19 May	TAP	direct
01 May - 15 May	TAP	direct
25 May - 03 Jun	Air Canada
06 May - 22 May	SWISS
14 May - 25 May	TAP	direct
04 May - 30 May	TAP	direct
04 May - 10 May	United
21 May - 31 May	TAP	direct
16 May - 23 May	TAP	direct
23 May - 11 Jun	Air Canada
25 May - 03 Jun	TAP	direct
21 May - 01 Jun	TAP	direct
20 May - 13 Jun	TAP	direct
23 May - 11 Jun	TAP	direct
16 May - 06 Jun	TAP	direct
24 May - 13 Jun	TAP	direct
22 May - 29 May	TAP	direct
31 May - 20 Jun	SWISS
26 May - 20 Jun	SWISS

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 350€

Return flights