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

Return flights

19 Sep - 06 Oct	Delta
17 Sep - 23 Oct	Delta
11 Sep - 15 Sep	Delta
12 Sep - 15 Sep	Delta
25 Sep - 28 Sep	Delta
23 Sep - 04 Oct	Delta
25 Sep - 23 Oct	Delta
18 Sep - 27 Sep	Delta
12 Sep - 27 Sep	Delta
15 Sep - 04 Oct	Delta
15 Sep - 21 Sep	Delta
17 Sep - 21 Sep	Delta
12 Sep - 21 Sep	Delta
08 Sep - 16 Sep	Delta
24 Sep - 24 Oct	Lufthansa
08 Sep - 15 Sep	Delta
30 Sep - 06 Oct	Delta
23 Sep - 07 Oct	United
22 Sep - 07 Oct	Lufthansa
26 Sep - 04 Oct	Delta

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

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 New York

Cheap car rent in New York

Cheapest return flights from Lisbon to New York in September from 431€

Return flights