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

Return flights

25 Sep - 28 Sep	Iberia For Level
22 Sep - 29 Sep	Iberia For Level
24 Sep - 30 Sep	Vueling Airlines
22 Sep - 26 Sep	Iberia For Level
24 Sep - 04 Oct	Vueling Airlines
23 Sep - 26 Sep	Iberia For Level
23 Sep - 27 Sep	Iberia For Level
15 Sep - 22 Sep	easyJet
15 Sep - 23 Sep	easyJet
22 Sep - 23 Sep	easyJet
14 Sep - 23 Sep	TAP
29 Sep - 03 Oct	easyJet
28 Sep - 08 Oct	Vueling Airlines
28 Sep - 04 Oct	Vueling Airlines
28 Sep - 03 Oct	Vueling Airlines
29 Sep - 10 Oct	easyJet
29 Sep - 11 Oct	easyJet
25 Sep - 02 Oct	Vueling Airlines
29 Sep - 04 Oct	Iberia
29 Sep - 06 Oct	Iberia

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.

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Cheapest return flights from Lisbon to New York in September from 322€

Return flights