Cheapest return flights from Phoenix to Keflavik in April from $608

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

Return flights

19 Apr - 26 Apr Allegiant Air
03 Apr - 10 Apr Frontier Airlines
01 Apr - 08 Apr Hawaiian Airlines
22 Apr - 29 Apr Alaska Airlines
02 Apr - 09 Apr Frontier Airlines
25 Apr - 02 May Alaska Airlines
21 Apr - 28 Apr Hawaiian Airlines
10 Apr - 17 Apr Porter Airlines (Canada) Ltd
09 Apr - 16 Apr WestJet
12 Apr - 19 Apr Hawaiian Airlines
20 Apr - 27 Apr Hawaiian Airlines

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

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