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

Return flights

01 Dec - 08 Dec	Air Canada
11 Dec - 18 Dec	United
04 Dec - 09 Dec	United
13 Dec - 22 Jan	TAP
05 Dec - 12 Dec	SWISS
17 Dec - 14 Jan	United
14 Dec - 22 Jan	Air Canada
31 Dec - 07 Jan	United
17 Dec - 11 Jan	United
14 Dec - 01 Jan	Air Canada
22 Dec - 01 Jan	Air Canada
29 Dec - 05 Jan	Air Canada
28 Dec - 04 Jan	Scandinavian Airlines
18 Dec - 07 Jan	United
23 Dec - 30 Dec	United
22 Dec - 27 Dec	Air Canada
21 Dec - 25 Dec	United
19 Dec - 28 Dec	TAP

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

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 December from 300€

Return flights