Cheapest one-way flights from San Francisco to Keflavik in September from 264€

AirHint found the following cheapest one-way flights from San Francisco (SFO) to Keflavik (KEF) in September 2025 (see full year).

One-Way flights

13 Sep Alaska Airlines
23 Sep Flair Airlines
02 Sep United

Also check the deals for return flights from San Francisco to Keflavik in September.

Skyscanner

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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