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

Return flights

06 Dec - 11 Dec	United
06 Dec - 10 Dec	United
05 Dec - 09 Dec	United
02 Dec - 09 Dec	United	direct
02 Dec - 15 Jan	United	direct
06 Dec - 13 Dec	Frontier Airlines
04 Dec - 08 Dec	United
05 Dec - 12 Dec	United
03 Dec - 08 Dec	United
03 Dec - 09 Dec	United
06 Dec - 12 Dec	United
31 Dec - 18 Jan	Arajet
30 Dec - 20 Jan	Spirit Airlines
30 Dec - 13 Jan	Spirit Airlines
16 Dec - 14 Jan	Frontier Airlines
29 Dec - 21 Jan	Spirit Airlines
30 Dec - 09 Jan	Spirit Airlines
31 Dec - 08 Jan	Spirit Airlines
08 Dec - 14 Jan	Spirit Airlines
13 Dec - 12 Jan	Frontier Airlines

Also check the deals for one-way flights from Newark to Mexico City 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 Mexico City in December from $391

Return flights