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

Return flights

29 Aug - 02 Sep	Air France
29 Aug - 05 Sep	Delta
27 Aug - 07 Sep	Air France
28 Aug - 01 Sep	KLM
28 Aug - 02 Sep	Air France
26 Aug - 02 Sep	Air France
27 Aug - 03 Sep	Delta
26 Aug - 03 Sep	Delta
30 Aug - 30 Sep	Lufthansa
25 Aug - 08 Sep	United
28 Aug - 31 Aug	Delta
21 Aug - 25 Aug	Delta
20 Aug - 25 Aug	Delta
21 Aug - 24 Aug	Delta
22 Aug - 27 Aug	Delta
21 Aug - 27 Aug	Delta
22 Aug - 30 Aug	Delta
22 Aug - 31 Aug	Delta
21 Aug - 30 Aug	Delta
20 Aug - 31 Aug	Delta

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

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Cheapest return flights from Lisbon to Newark in August from 487€

Return flights