AirHint found the following cheapest return flights from Newark (EWR) to Lisbon (LIS) in August 2025 (see full year).

Return flights

11 Aug - 05 Sep	Air Canada
05 Aug - 22 Sep	United
11 Aug - 11 Sep	Air Canada
11 Aug - 12 Sep	United
20 Aug - 28 Aug	Icelandair
04 Aug - 23 Sep	Air Canada
14 Aug - 03 Sep	Air Canada
04 Aug - 23 Sep	TAP	direct
06 Aug - 10 Aug	Icelandair
07 Aug - 12 Aug	United
04 Aug - 12 Aug	United	direct
25 Aug - 03 Sep	Air Canada
05 Aug - 11 Aug	United
26 Aug - 03 Sep	Air Canada
27 Aug - 12 Sep	United	direct
20 Aug - 24 Aug	Icelandair
05 Aug - 26 Aug	TAP	direct
19 Aug - 27 Aug	Delta
04 Aug - 29 Aug	Air France
17 Aug - 29 Aug	Delta

Also check the deals for one-way flights from Newark to Lisbon in August.

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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon

Cheapest return flights from Newark to Lisbon in August from 365€

Return flights