AirHint found the following cheapest return flights from Warsaw (WMI) to Keflavik (KEF) in August 2025 (see full year).

Return flights

09 Aug - 17 Aug	Ryanair
16 Aug - 24 Aug	Ryanair
13 Aug - 17 Aug	Ryanair
30 Aug - 10 Sep	Ryanair
15 Aug - 17 Aug	Ryanair
22 Aug - 27 Aug	Ryanair
09 Aug - 16 Aug	Ryanair
23 Aug - 03 Sep	Ryanair
23 Aug - 30 Aug	Ryanair
24 Aug - 31 Aug	Ryanair
02 Aug - 15 Aug	Ryanair
29 Aug - 08 Sep	Ryanair
25 Aug - 01 Sep	Ryanair
17 Aug - 24 Aug	Ryanair
20 Aug - 28 Sep	Ryanair
29 Aug - 03 Sep	Ryanair
31 Aug - 07 Sep	Ryanair
26 Aug - 04 Sep	Ryanair
30 Aug - 06 Sep	Ryanair

Also check the deals for one-way flights from Warsaw to Keflavik in August.

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 Warsaw to Keflavik in August from 261€

Return flights