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

Return flights

14 May - 21 May	Fly Play	direct
01 May - 08 May	Austrian Airlines
24 May - 31 May	LOT
31 May - 05 Jun	LOT
11 May - 18 May	Scandinavian Airlines
21 May - 28 May	Lufthansa
11 May - 18 May	Icelandair	direct
28 May - 04 Jun	Scandinavian Airlines
01 May - 08 May	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 168€

Return flights