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

Return flights

12 Aug - 21 Aug	Air Canada
25 Aug - 04 Sep	Lufthansa
31 Aug - 04 Sep	Air Canada
09 Aug - 21 Aug	Air Canada
23 Aug - 04 Sep	Lufthansa
24 Aug - 02 Sep	Air Canada
20 Aug - 26 Aug	Air Canada
25 Aug - 01 Sep	Air Canada
14 Aug - 25 Aug	Air Canada
18 Aug - 28 Aug	Air Canada
14 Aug - 22 Aug	Air Canada
18 Aug - 25 Aug	Air Canada
14 Aug - 23 Aug	Air Canada
09 Aug - 18 Aug	Air Canada
05 Aug - 12 Aug	Air Canada
26 Aug - 07 Sep	Air Canada
27 Aug - 03 Sep	Air Canada
28 Aug - 08 Sep	Air Canada
23 Aug - 02 Sep	Delta
31 Aug - 07 Sep	Air Canada

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.

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Cheapest return flights from New York to Lisbon in August from $444

Return flights