AirHint found the following cheapest return flights from Zagreb (ZAG) to Keflavik (KEF) in April 2026 (see full year).
Return flights
| 23 Apr - 29 Apr | LOT | ||
| 15 Apr - 22 Apr | Croatia Airlines | ||
| 01 Apr - 06 Apr | Air Serbia | ||
| 24 Apr - 30 Apr | Austrian Airlines | ||
| 30 Apr - 04 May | Lufthansa |
Also check the deals for one-way flights from Zagreb to Keflavik in April.
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