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

Return flights

11 Aug - 05 Sep	United
14 Aug - 13 Sep	Air Canada
14 Aug - 12 Sep	Air Canada
13 Aug - 28 Aug	KLM
03 Aug - 29 Aug	United
19 Aug - 27 Aug	United
18 Aug - 29 Aug	Air Canada
11 Aug - 27 Aug	United
16 Aug - 27 Aug	United
18 Aug - 27 Aug	United
16 Aug - 29 Aug	Air Canada
20 Aug - 17 Sep	United
20 Aug - 14 Sep	United
20 Aug - 16 Sep	United	direct
20 Aug - 06 Sep	United
09 Aug - 02 Sep	United
20 Aug - 05 Sep	United
03 Aug - 26 Aug	United
19 Aug - 26 Aug	United
26 Aug - 06 Sep	Air Canada

Also check the deals for one-way flights from Newark to Madrid in August.

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 August from 300€

Return flights