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

Return flights

06 May - 14 May	Air Canada
06 May - 18 May	Air Canada
06 May - 13 May	Air Canada
16 May - 29 May	Air Canada
21 May - 01 Jun	Air Canada
21 May - 29 May	Air Canada
25 May - 08 Jun	Air Canada
28 May - 11 Jun	Air Canada
23 May - 13 Jun	Air Canada
15 May - 19 May	British Airways
14 May - 17 May	British Airways
21 May - 13 Jun	Air Canada
25 May - 17 Jun	Air Canada
28 May - 20 Jun	Air Canada
21 May - 02 Jun	SWISS
28 May - 12 Jun	Air Canada
25 May - 03 Jun	United
09 May - 30 May	British Airways
15 May - 22 May	Austrian Airlines
14 May - 25 May	British Airways

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 $459

Return flights