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	Virgin Australia
01 Dec - 09 Dec	Air Canada
25 Dec - 22 Jan	Air New Zealand
03 Dec - 17 Dec	Air Canada
10 Dec - 06 Jan	United
11 Dec - 14 Jan	United
03 Dec - 12 Dec	Air Canada
12 Dec - 27 Dec	United
12 Dec - 09 Jan	United
23 Dec - 30 Dec	Jetstar
16 Dec - 08 Jan	Jetstar
25 Dec - 12 Jan	United
25 Dec - 08 Jan	Hawaiian Airlines
25 Dec - 04 Jan	Hawaiian Airlines
19 Dec - 09 Jan	Jetstar
22 Dec - 29 Dec	Fiji Airways
08 Dec - 23 Dec	Delta
08 Dec - 22 Dec	LATAM Airlines Group

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 1460€

Return flights