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

Return flights

01 Dec - 07 Dec	TAP
03 Dec - 10 Dec	TAP
13 Dec - 20 Jan	TAP
04 Dec - 13 Dec	Air Canada
01 Dec - 08 Dec	TAP
09 Dec - 30 Jan	TAP
02 Dec - 09 Dec	TAP
02 Dec - 04 Dec	Air Canada
12 Dec - 16 Dec	Air Canada
01 Dec - 03 Dec	United
01 Dec - 07 Dec	United	direct
27 Dec - 16 Jan	Air Canada
10 Dec - 11 Jan	Air Canada
14 Dec - 22 Jan	TAP
12 Dec - 10 Jan	Air Canada
14 Dec - 20 Jan	TAP
30 Dec - 06 Jan	Air Canada
12 Dec - 17 Jan	Air Canada
11 Dec - 11 Jan	United
02 Dec - 04 Dec	Lufthansa	direct

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 $299

Return flights