AirHint found the following cheapest return flights from San Jose (SJC) to Sydney (SYD) in October 2025 (see full year).

Return flights

29 Oct - 09 Nov	Hawaiian Airlines
17 Oct - 23 Oct	Alaska Airlines
25 Oct - 11 Nov	Alaska Airlines
27 Oct - 11 Nov	Hawaiian Airlines
24 Oct - 11 Nov	Hawaiian Airlines
26 Oct - 29 Oct	Alaska Airlines
20 Oct - 24 Oct	Alaska Airlines
18 Oct - 25 Oct	Alaska Airlines
29 Oct - 12 Nov	Qantas
28 Oct - 11 Nov	Qantas
21 Oct - 28 Oct	Korean Air
22 Oct - 05 Nov	Korean Air
26 Oct - 11 Nov	Qantas
22 Oct - 29 Oct	Qatar Airways
26 Oct - 01 Nov	Qantas
31 Oct - 14 Nov	Qantas

Also check the deals for one-way flights from San Jose to Sydney 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 San Jose to Sydney in October from $871

Return flights