Cheapest return flights from San Francisco to Keflavik in October from $660

Best time to book flights for San Francisco (SFO) to Keflavik (KEF) flights at AirHint

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

Return flights

15 Oct - 22 Oct Hawaiian Airlines
28 Oct - 04 Nov Hawaiian Airlines
01 Oct - 08 Oct Hawaiian Airlines
27 Oct - 03 Nov Hawaiian Airlines
21 Oct - 28 Oct Hawaiian Airlines
14 Oct - 21 Oct jetBlue
16 Oct - 23 Oct jetBlue
12 Oct - 19 Oct jetBlue
22 Oct - 29 Oct Alaska Airlines
07 Oct - 14 Oct Air France
11 Oct - 18 Oct Hawaiian Airlines
08 Oct - 15 Oct Hawaiian Airlines
25 Oct - 01 Nov Hawaiian Airlines
26 Oct - 02 Nov Hawaiian Airlines

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

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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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