AirHint found the following cheapest return flights from Newark (EWR) to Madrid (MAD) in September 2026 (see full year).

Return flights

20 Sep - 30 Sep	Air Canada
23 Sep - 13 Oct	TAP
29 Sep - 06 Oct	United
20 Sep - 26 Sep	TAP
09 Sep - 13 Sep	TAP
19 Sep - 27 Sep	TAP
01 Sep - 14 Sep	TAP
10 Sep - 20 Sep	TAP
09 Sep - 19 Sep	Scandinavian Airlines
01 Sep - 30 Sep	TAP
04 Sep - 28 Sep	TAP
10 Sep - 20 Sep	Lufthansa	direct

Also check the deals for one-way flights from Newark 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 Newark to Madrid in September from $417

Return flights