AirHint found the following cheapest return flights from Zagreb (ZAG) to Keflavik (KEF) in July 2025 (see full year).

Return flights

25 Jul - 01 Aug	Ryanair
15 Jul - 25 Jul	Ryanair
29 Jul - 06 Aug	Ryanair
17 Jul - 24 Jul	Ryanair
22 Jul - 30 Jul	Ryanair
15 Jul - 22 Jul	Ryanair
14 Jul - 20 Jul	Ryanair
09 Jul - 16 Jul	Ryanair
14 Jul - 24 Jul	Ryanair
31 Jul - 12 Aug	Ryanair
17 Jul - 21 Jul	Ryanair
23 Jul - 30 Jul	Ryanair
21 Jul - 28 Jul	Ryanair
26 Jul - 04 Aug	LOT
31 Jul - 05 Aug	Ryanair

Also check the deals for one-way flights from Zagreb to Keflavik in July.

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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Cheapest return flights from Zagreb to Keflavik in July from 239€

Return flights