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

Return flights

01 Dec - 08 Dec	Volaris
04 Dec - 13 Dec	Mexicana
30 Dec - 10 Jan	Viva
26 Dec - 10 Jan	Viva
10 Dec - 13 Dec	Viva
24 Dec - 08 Jan	Viva
17 Dec - 09 Jan	Aeromexico
13 Dec - 01 Jan	Volaris
16 Dec - 06 Jan	Hainan Airlines
20 Dec - 07 Jan	Viva
15 Dec - 05 Jan	Hainan Airlines
12 Dec - 19 Jan	United
12 Dec - 15 Dec	Aeromexico
08 Dec - 14 Dec	Qantas
07 Dec - 14 Dec	Qantas
15 Dec - 21 Dec	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 1242€

Return flights