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

Return flights

07 May - 21 May	Ryanair
06 May - 14 May	Ryanair
07 May - 14 May	Ryanair
12 May - 24 May	Ryanair
01 May - 05 May	Wizz Air Malta
14 May - 28 May	Ryanair
24 May - 27 May	Ryanair
06 May - 13 May	Lufthansa
07 May - 14 May	Icelandair	direct
10 May - 24 May	easyJet
26 May - 08 Jun	Ryanair
31 May - 10 Jun	easyJet
28 May - 02 Jun	Scandinavian Airlines
29 May - 09 Jun	Scandinavian Airlines
26 May - 04 Jun	Scandinavian Airlines
24 May - 04 Jun	Scandinavian Airlines
30 May - 05 Jun	Ryanair
20 May - 02 Jun	Lufthansa
31 May - 11 Jun	easyJet
30 May - 16 Jun	Ryanair

Also check the deals for one-way flights from Frankfurt 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 Frankfurt to Keflavik in May from 184€

Return flights