AirHint found the following cheapest return flights from San Francisco (SFO) to Sydney (SYD) in May 2026 (see full year).

Return flights

08 May - 24 May	Fiji Airways
20 May - 07 Jun	Alaska Airlines
17 May - 31 May	Fiji Airways
29 May - 10 Jun	Alaska Airlines
22 May - 07 Jun	Fiji Airways
14 May - 25 May	Frontier Airlines
01 May - 27 May	Frontier Airlines
17 May - 31 May	United	direct
15 May - 30 May	United	direct
22 May - 07 Jun	United	direct
20 May - 07 Jun	United	direct
08 May - 24 May	United	direct
14 May - 25 May	United	direct

Also check the deals for one-way flights from San Francisco to Sydney in May.

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 Sydney in May from 593€

Return flights