Cheapest return flights from San Francisco to Keflavik in April from $559

AirHint found the following cheapest return flights from San Francisco (SFO) to Keflavik (KEF) in April 2026 (see full year).

Return flights

21 Apr - 28 Apr Lufthansa
14 Apr - 21 Apr Lufthansa
15 Apr - 22 Apr British Airways
16 Apr - 23 Apr SWISS
19 Apr - 26 Apr Lufthansa
17 Apr - 24 Apr Lufthansa
18 Apr - 25 Apr Scandinavian Airlines
20 Apr - 27 Apr Air France
13 Apr - 20 Apr British Airways

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

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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