Cheapest return flights from San Francisco to Keflavik in October from $659

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

06 Oct - 13 Oct Scandinavian Airlines
10 Oct - 19 Oct Flair Airlines
22 Oct - 29 Oct Hawaiian Airlines
11 Oct - 20 Oct Scandinavian Airlines
10 Oct - 17 Oct Flair Airlines
10 Oct - 20 Oct Scandinavian 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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