Cheapest one-way flights from Sydney to San Jose in December from $1474

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

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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.