Cheapest return flights from San Francisco to Keflavik in August from $491
AirHint found the following cheapest return flights from San Francisco (SFO) to Keflavik (KEF) in August 2025 (see full year).
Return flights
Also check the deals for one-way flights from San Francisco to Keflavik in August.
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.
