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

Return flights

26 Sep - 01 Oct	United
30 Sep - 06 Oct	Scandinavian Airlines
24 Sep - 18 Oct	Scandinavian Airlines
30 Sep - 07 Oct	United
26 Sep - 28 Sep	United	direct
25 Sep - 30 Sep	United
26 Sep - 30 Sep	United
29 Sep - 06 Oct	United
30 Sep - 16 Oct	United
29 Sep - 16 Oct	United
30 Sep - 05 Oct	Lufthansa	direct
29 Sep - 05 Oct	Lufthansa	direct
29 Sep - 07 Oct	United
25 Sep - 30 Sep	Lufthansa	direct
25 Sep - 28 Sep	Lufthansa	direct
25 Sep - 28 Sep	Delta
26 Sep - 30 Sep	Lufthansa	direct
23 Sep - 25 Sep	TAP
27 Sep - 30 Sep	Delta
23 Sep - 29 Sep	Iberia

Also check the deals for one-way flights from Madrid to Newark 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 Madrid to Newark in September from $529

Return flights