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

Return flights

29 Aug - 06 Sep	TAP
26 Aug - 05 Sep	Delta
28 Aug - 04 Sep	KLM
25 Aug - 31 Aug	Air France
25 Aug - 08 Sep	Air France
29 Aug - 07 Sep	Air France
25 Aug - 02 Sep	Air France
25 Aug - 01 Sep	Air France
25 Aug - 04 Sep	Delta
26 Aug - 03 Sep	SWISS
26 Aug - 19 Sep	SWISS
07 Aug - 27 Aug	Lufthansa
26 Aug - 30 Aug	Ryanair
22 Aug - 31 Aug	Air France
22 Aug - 27 Aug	Delta
13 Aug - 27 Aug	Delta
22 Aug - 25 Aug	Delta
07 Aug - 10 Aug	Delta
05 Aug - 10 Aug	Delta
22 Aug - 24 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 453€

Return flights