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

Return flights

28 Oct - 13 Nov	Korean Air
19 Oct - 27 Oct	Korean Air
23 Oct - 02 Nov	Korean Air
07 Oct - 17 Oct	Korean Air
02 Oct - 10 Oct	Qatar Airways
13 Oct - 31 Oct	Qatar Airways
08 Oct - 16 Oct	Qatar Airways
14 Oct - 21 Oct	Qatar Airways
14 Oct - 23 Oct	Qatar Airways
14 Oct - 22 Oct	Qatar Airways
14 Oct - 19 Oct	Qatar Airways
18 Oct - 31 Oct	Qatar Airways
18 Oct - 16 Nov	Qatar Airways

Also check the deals for one-way flights from Oakland to Singapore 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 Oakland to Singapore in October from $983

Return flights