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

Return flights

10 May - 20 May	TAP
10 May - 20 May	TAP	direct
13 May - 20 May	TAP	direct
05 May - 12 May	United
12 May - 19 May	Air Canada
05 May - 12 May	TAP	direct
12 May - 19 May	TAP	direct
04 May - 11 May	United
11 May - 18 May	United
08 May - 15 May	SWISS
11 May - 06 Jun	TAP
15 May - 01 Jun	TAP
16 May - 06 Jun	British Airways
11 May - 06 Jun	TAP	direct
23 May - 08 Jun	TAP
16 May - 06 Jun	TAP	direct
24 May - 13 Jun	TAP	direct

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 $456

Return flights