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

Return flights

15 Dec - 22 Jan	Jetstar
21 Dec - 26 Jan	Qantas
22 Dec - 22 Jan	Jetstar
21 Dec - 22 Jan	Jetstar
08 Dec - 15 Dec	Air Canada
12 Dec - 08 Jan	Qantas
15 Dec - 10 Jan	Jetstar
06 Dec - 27 Dec	Air Canada
15 Dec - 04 Jan	Jetstar
25 Dec - 30 Dec	Air Canada
07 Dec - 27 Dec	Air Canada
09 Dec - 27 Dec	Air Canada
12 Dec - 27 Dec	United
29 Dec - 23 Jan	Air Canada
12 Dec - 02 Jan	United
05 Dec - 27 Dec	United
28 Dec - 19 Jan	Delta
24 Dec - 31 Dec	United
16 Dec - 24 Dec	United

Also check the deals for one-way flights from Sydney 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 Sydney to Mexico City in December from 1397€

Return flights