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

Return flights

29 Sep - 07 Oct	Air Canada
28 Sep - 07 Oct	Air Canada
22 Sep - 01 Oct	Lufthansa
21 Sep - 01 Oct	Air Canada
23 Sep - 01 Oct	Air Canada
23 Sep - 03 Oct	Air Canada
23 Sep - 14 Oct	Air Canada
22 Sep - 26 Sep	Air Canada
15 Sep - 23 Sep	American Airlines
14 Sep - 23 Sep	American Airlines
15 Sep - 26 Sep	American Airlines
23 Sep - 26 Sep	American Airlines
23 Sep - 02 Oct	United
21 Sep - 30 Sep	Lufthansa
23 Sep - 30 Sep	Air Canada
22 Sep - 06 Oct	Lufthansa
25 Sep - 07 Oct	Air Canada
21 Sep - 23 Sep	Air Canada
09 Sep - 16 Sep	Air Canada
10 Sep - 17 Sep	United

Also check the deals for one-way flights from New York to Madrid 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 New York to Madrid in September from $332

Return flights