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

Return flights

18 Aug - 25 Aug	Qantas
15 Aug - 05 Sep	Qantas
27 Aug - 09 Sep	Delta
29 Aug - 27 Sep	Delta
20 Aug - 07 Sep	Delta
29 Aug - 19 Sep	Delta
01 Aug - 08 Sep	Delta
15 Aug - 07 Sep	Delta
30 Aug - 19 Sep	Delta
30 Aug - 18 Sep	Delta
03 Aug - 19 Sep	Delta
12 Aug - 20 Aug	Delta
04 Aug - 11 Aug	Delta
08 Aug - 22 Aug	Delta

Also check the deals for one-way flights from Sydney to Mexico City in August.

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 August from $1172

Return flights