Cheapest return flights from San Francisco to Keflavik in April from $647

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

Return flights

14 Apr - 20 Apr Hawaiian Airlines
12 Apr - 19 Apr Scandinavian Airlines
12 Apr - 26 Apr Scandinavian Airlines
13 Apr - 20 Apr Frontier Airlines
16 Apr - 21 Apr jetBlue
05 Apr - 13 Apr jetBlue
25 Apr - 01 May jetBlue
04 Apr - 12 Apr Frontier Airlines
03 Apr - 12 Apr jetBlue
05 Apr - 12 Apr Sun Country Airlines
04 Apr - 11 Apr jetBlue

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

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