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

Return flights

04 May - 11 May	STARLUX Airlines
02 May - 09 May	United	direct
14 May - 18 May	United	direct
08 May - 17 May	United	direct
03 May - 22 May	China Airlines
31 May - 30 Jun	China Airlines
04 May - 15 May	STARLUX Airlines
13 May - 27 May	STARLUX Airlines
01 May - 16 May	STARLUX Airlines
22 May - 29 May	STARLUX Airlines
17 May - 31 May	STARLUX Airlines
09 May - 23 Jun	STARLUX Airlines
27 May - 01 Jun	EVA Air
24 May - 06 Jun	EVA Air
30 May - 14 Jun	EVA Air
30 May - 15 Jun	EVA Air
30 May - 15 Jun	United	direct
16 May - 01 Jun	United	direct
27 May - 01 Jun	United	direct
27 May - 11 Jun	EVA Air

Also check the deals for one-way flights from Singapore 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 Singapore to San Francisco in May from 630€

Return flights