Cheapest return flights from San Francisco to Keflavik in August from 531€

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

Return flights

04 Aug - 20 Aug Air Canada
25 Aug - 30 Aug Frontier Airlines
09 Aug - 19 Aug Air Canada
13 Aug - 30 Aug Frontier Airlines
15 Aug - 21 Aug SWISS
23 Aug - 30 Aug United
21 Aug - 28 Aug United
27 Aug - 01 Sep Hawaiian Airlines
06 Aug - 16 Aug Alaska Airlines
30 Aug - 06 Sep United
28 Aug - 04 Sep United
25 Aug - 01 Sep United

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

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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