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

Return flights

17 Oct - 25 Oct	Fiji Airways
31 Oct - 08 Nov	Air Canada
17 Oct - 06 Nov	Air Canada
14 Oct - 25 Oct	Delta
22 Oct - 07 Nov	Air Canada
27 Oct - 01 Nov	Air Canada
17 Oct - 14 Nov	Delta
31 Oct - 30 Nov	Air Canada
30 Oct - 09 Nov	Delta
04 Oct - 10 Oct	Qantas

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

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 October from 938€

Return flights