AirHint found the following cheapest return flights from Warsaw (WMI) to Keflavik (KEF) in May 2026 (see full year).

Return flights

04 May - 10 May	Ryanair
09 May - 12 May	Ryanair
26 May - 09 Jun	Ryanair
05 May - 11 May	Ryanair
06 May - 10 May	Ryanair
08 May - 11 May	Ryanair
29 May - 10 Jun	Ryanair
26 May - 08 Jun	Ryanair
20 May - 24 May	Ryanair
06 May - 11 May	Ryanair
27 May - 10 Jun	Ryanair
31 May - 04 Jun	Ryanair
30 May - 03 Jun	Ryanair
24 May - 31 May	Ryanair
29 May - 02 Jun	Ryanair
23 May - 29 Jun	Ryanair
26 May - 02 Jun	Ryanair
30 May - 11 Jun	Ryanair

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

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 May from $278

Return flights