Cheapest one-way flights from San Jose to Keflavik in September from $378

Best time to book flights for San Jose (SJC) to Keflavik (KEF) flights at AirHint

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

One-Way flights

11 Sep Alaska Airlines
10 Sep Scandinavian Airlines

Also check the deals for return flights from San Jose 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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