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

Return flights

12 May - 19 May	easyJet
20 May - 26 May	easyJet
14 May - 25 May	easyJet
07 May - 09 May	Scandinavian Airlines
09 May - 15 May	easyJet
01 May - 11 May	Austrian Airlines
01 May - 12 May	Austrian Airlines
05 May - 14 May	Austrian Airlines
07 May - 14 May	easyJet
09 May - 16 May	easyJet
14 May - 02 Jun	easyJet
29 May - 12 Jun	easyJet
27 May - 03 Jun	Scandinavian Airlines
30 May - 13 Jun	Scandinavian Airlines
31 May - 13 Jun	Scandinavian Airlines
30 May - 17 Jun	Vueling Airlines
29 May - 12 Jun	Icelandair	direct

Also check the deals for one-way flights from Prague 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 Prague to Keflavik in May from 161€

Return flights