AirHint found the following cheapest return flights from San Francisco (SFO) to Melbourne (MEL) in December 2025 (see full year).

Return flights

12 Dec - 17 Dec	Fiji Airways
14 Dec - 29 Dec	Fiji Airways
01 Dec - 24 Dec	Qantas
23 Dec - 21 Jan	United	direct
10 Dec - 13 Jan	United
08 Dec - 28 Dec	United
08 Dec - 11 Jan	United
08 Dec - 10 Jan	United
22 Dec - 10 Jan	Alaska Airlines
01 Dec - 03 Jan	Air New Zealand
14 Dec - 30 Dec	United	direct
14 Dec - 29 Dec	United	direct
22 Dec - 10 Jan	United	direct
05 Dec - 03 Jan	Qantas
19 Dec - 14 Jan	Philippine Airlines
18 Dec - 08 Jan	Hawaiian Airlines
12 Dec - 17 Dec	United	direct
19 Dec - 31 Dec	Philippine Airlines

Also check the deals for one-way flights from San Francisco to Melbourne 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 return flights from San Francisco to Melbourne in December from $891

Return flights