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

Return flights

20 Aug - 28 Aug	Icelandair
16 Aug - 21 Aug	Icelandair
19 Aug - 26 Aug	Air Canada
27 Aug - 03 Sep	Air Canada
13 Aug - 08 Sep	United
20 Aug - 27 Aug	Air Canada
21 Aug - 28 Aug	Air Canada
28 Aug - 04 Sep	Aer Lingus
25 Aug - 01 Sep	Air Canada
02 Aug - 10 Aug	Icelandair
11 Aug - 19 Aug	Aer Lingus
26 Aug - 02 Sep	Air Canada
09 Aug - 19 Aug	Aer Lingus
06 Aug - 14 Aug	Icelandair
21 Aug - 27 Aug	Air Canada
24 Aug - 02 Sep	Iberia For Level
25 Aug - 03 Sep	Air Canada
27 Aug - 08 Sep	Iberia For Level
25 Aug - 08 Sep	Lufthansa
11 Aug - 01 Sep	SWISS

Also check the deals for one-way flights from New York 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 New York to Lisbon in August from 359€

Return flights