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

Return flights

06 May - 12 May	easyJet
14 May - 21 May	Ryanair
27 May - 03 Jun	SWISS
20 May - 27 May	easyJet
27 May - 01 Jun	SWISS
11 May - 27 May	Ryanair
14 May - 18 May	Ryanair
13 May - 20 May	easyJet
09 May - 18 May	Wizz Air UK
11 May - 18 May	Ryanair
27 May - 05 Jun	Ryanair
25 May - 27 May	Transavia France
30 May - 02 Jun	Austrian Airlines
09 May - 16 May	Wizz Air UK
19 May - 02 Jun	Wizz Air UK
16 May - 03 Jun	Ryanair
29 May - 01 Jun	Lufthansa
28 May - 11 Jun	Scandinavian Airlines
24 May - 09 Jun	Lufthansa
16 May - 03 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 183€

Return flights