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

Return flights

04 Dec - 17 Jan	Volaris
01 Dec - 13 Dec	Aeromexico
08 Dec - 22 Dec	ANA
02 Dec - 16 Dec	United
01 Dec - 10 Dec	United
01 Dec - 08 Dec	United
03 Dec - 06 Jan	Qantas
05 Dec - 05 Jan	United
16 Dec - 30 Dec	Turkish Airlines
24 Dec - 09 Jan	Qantas
15 Dec - 27 Dec	Emirates
22 Dec - 17 Jan	Emirates
21 Dec - 17 Jan	Emirates
19 Dec - 17 Jan	Emirates
20 Dec - 17 Jan	Emirates
24 Dec - 08 Jan	United
21 Dec - 06 Jan	United

Also check the deals for one-way flights from Mexico City to Sydney 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 Mexico City to Sydney in December from 1284€

Return flights