AirHint found the following cheapest return flights from Singapore (SIN) to San Francisco (SFO) in October 2025 (see full year).

Return flights

12 Oct - 18 Oct	United	direct
10 Oct - 21 Oct	United	direct
25 Oct - 31 Oct	United	direct
09 Oct - 12 Oct	United	direct
11 Oct - 24 Oct	United	direct
09 Oct - 13 Oct	United	direct
07 Oct - 14 Oct	United	direct
15 Oct - 28 Oct	United	direct
03 Oct - 06 Oct	United	direct
17 Oct - 17 Oct	United	direct
25 Oct - 22 Nov	United	direct

Also check the deals for one-way flights from Singapore to San Francisco in October.

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 October from 512€

Return flights