AirHint found the following cheapest return flights from New York (NYC) to Lisbon (LIS) in August 2026 (see full year).

Return flights

18 Aug - 26 Aug	Air Canada
05 Aug - 19 Aug	Air Canada
14 Aug - 18 Aug	Aer Lingus
14 Aug - 23 Aug	Aer Lingus
05 Aug - 13 Aug	Air Canada
01 Aug - 09 Aug	Iberia
01 Aug - 22 Aug	LEVEL
29 Aug - 05 Sep	Delta	direct
05 Aug - 19 Aug	TAP	direct
04 Aug - 13 Aug	United
01 Aug - 06 Aug	Turkish Airlines

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 482€

Return flights