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

Return flights

10 Jul - 20 Jul	SWISS
09 Jul - 20 Jul	SWISS
16 Jul - 20 Jul	SWISS
05 Jul - 06 Jul	Lufthansa
10 Jul - 18 Jul	SWISS
10 Jul - 19 Jul	SWISS
04 Jul - 12 Jul	Lufthansa
04 Jul - 06 Jul	Lufthansa
17 Jul - 20 Jul	Lufthansa
31 Jul - 02 Aug	Ryanair
31 Jul - 07 Aug	Ryanair
09 Jul - 17 Jul	SWISS
31 Jul - 06 Aug	Ryanair
24 Jul - 07 Aug	SWISS
09 Jul - 01 Aug	SWISS
30 Jul - 05 Aug	Ryanair
26 Jul - 05 Aug	SWISS
26 Jul - 02 Aug	SWISS
24 Jul - 10 Aug	SWISS
30 Jul - 03 Aug	Ryanair

Also check the deals for one-way flights from Prague 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 Prague to Keflavik in July from 168€

Return flights