AirHint found the following cheapest one-way flights from San Jose (SJC) to Sydney (SYD) in December 2025 (see full year).

One-Way flights

24 Dec	Alaska Airlines
25 Dec	Alaska Airlines
26 Dec	Alaska Airlines
27 Dec	Alaska Airlines
17 Dec	Alaska Airlines
16 Dec	Alaska Airlines
23 Dec	Alaska Airlines
22 Dec	Alaska Airlines
21 Dec	Alaska Airlines

Also check the deals for return flights from San Jose to Sydney 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 one-way flights from San Jose to Sydney in December from 870€

One-Way flights