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

Return flights

12 May - 19 May	Singapore Airlines
08 May - 29 May	Singapore Airlines
12 May - 31 May	Singapore Airlines
05 May - 29 May	Singapore Airlines
27 May - 12 Jun	Singapore Airlines
21 May - 12 Jun	Qantas
15 May - 05 Jun	Qantas
29 May - 19 Jun	Singapore Airlines

Also check the deals for one-way flights from Adelaide to San Francisco 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 Adelaide to San Francisco in May from $1055

Return flights