Cheapest return flights from San Francisco to Keflavik in April from $505

Best time to book flights for San Francisco (SFO) to Keflavik (KEF) flights at AirHint

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

Return flights

07 Apr - 14 Apr Frontier Airlines
27 Apr - 30 Apr Frontier Airlines
02 Apr - 09 Apr Hawaiian Airlines
08 Apr - 15 Apr Hawaiian Airlines
30 Apr - 07 May Hawaiian Airlines
14 Apr - 21 Apr Hawaiian Airlines
09 Apr - 16 Apr Hawaiian Airlines
17 Apr - 24 Apr Hawaiian Airlines
08 Apr - 17 Apr Frontier Airlines
06 Apr - 13 Apr Frontier Airlines
03 Apr - 10 Apr Frontier Airlines
28 Apr - 05 May Hawaiian Airlines

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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik