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

Return flights

19 May - 28 May	Iberia
12 May - 19 May	Iberia
11 May - 18 May	Air Canada
05 May - 18 May	Air Canada
21 May - 27 May	Air Canada
14 May - 24 May	Iberia
08 May - 17 May	Iberia
06 May - 17 May	Iberia
07 May - 17 May	Iberia
14 May - 20 May	Iberia
19 May - 03 Jun	Air Canada
28 May - 04 Jun	Air Canada
26 May - 02 Jun	Air Canada
29 May - 30 Jun	Air Canada
25 May - 06 Jun	Iberia
25 May - 06 Jun	Air France	direct
22 May - 02 Jun	Delta
28 May - 04 Jun	Brussels Airlines	direct
26 May - 02 Jun	Brussels Airlines	direct
22 May - 01 Jun	Aer Lingus

Also check the deals for one-way flights from New York to Lisbon in May.

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 May from 397€

Return flights