AirHint found the following cheapest return flights from Melbourne (MEL) to San Francisco (SFO) in September 2026 (see full year).

Return flights

09 Sep - 30 Sep	United	direct
09 Sep - 29 Sep	United	direct
02 Sep - 02 Oct	United
24 Sep - 29 Sep	United	direct
23 Sep - 13 Oct	United	direct
21 Sep - 11 Oct	United	direct
26 Sep - 08 Oct	United	direct
16 Sep - 26 Sep	Cebu Pacific
16 Sep - 30 Sep	Fiji Airways
02 Sep - 31 Oct	China Airlines
02 Sep - 31 Oct	United	direct
16 Sep - 30 Sep	United	direct
16 Sep - 26 Sep	United	direct

Also check the deals for one-way flights from Melbourne to San Francisco in September.

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 Melbourne to San Francisco in September from $718

Return flights