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

Return flights

09 May - 12 May	Ryanair
07 May - 11 May	LOT
09 May - 12 May	Lufthansa	direct
07 May - 11 May	Icelandair	direct
26 May - 01 Jun	Icelandair	direct
26 May - 02 Jun	Icelandair	direct
30 May - 15 Jun	LOT
22 May - 30 May	Icelandair	direct
30 May - 15 Jun	Icelandair	direct
22 May - 05 Jun	Icelandair	direct
26 May - 05 Jun	easyJet
23 May - 30 May	British Airways
18 May - 28 May	Icelandair	direct

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 $272

Return flights