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

Return flights

18 Aug - 18 Sep	United
17 Aug - 06 Sep	Virgin Atlantic
21 Aug - 11 Sep	United
18 Aug - 18 Sep	United	direct
20 Aug - 29 Aug	United
18 Aug - 21 Aug	United
19 Aug - 26 Aug	United
17 Aug - 04 Sep	Delta
31 Aug - 05 Sep	Air Canada
17 Aug - 29 Aug	Delta
31 Aug - 11 Sep	United
18 Aug - 23 Aug	United
19 Aug - 23 Aug	United
17 Aug - 21 Aug	Air France
18 Aug - 22 Aug	Delta
17 Aug - 25 Aug	KLM
19 Aug - 24 Aug	Delta
19 Aug - 13 Sep	United	direct
31 Aug - 06 Sep	Air Canada
18 Aug - 13 Sep	United	direct

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 307€

Return flights