Cheapest return flights from Frankfurt to Keflavik in December from $250

Best time to book flights for Frankfurt (FRA) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest return flights from Frankfurt (FRA) to Keflavik (KEF) in December 2025 (see full year).

Return flights

01 Dec - 07 Dec Ryanair
09 Dec - 12 Dec LOT
15 Dec - 19 Dec Ryanair
30 Dec - 06 Jan Ryanair
27 Dec - 03 Jan Ryanair
02 Dec - 09 Dec Icelandair direct
27 Dec - 04 Jan Ryanair
09 Dec - 12 Dec Icelandair direct
25 Dec - 02 Jan LOT
01 Dec - 07 Dec Icelandair direct
24 Dec - 30 Dec Icelandair direct
30 Dec - 05 Jan LOT
15 Dec - 19 Dec Icelandair direct
25 Dec - 30 Dec Icelandair direct
30 Dec - 03 Jan Ryanair
30 Dec - 06 Jan Icelandair direct
25 Dec - 03 Jan Icelandair direct
23 Dec - 28 Dec Icelandair direct
30 Dec - 05 Jan Icelandair direct
30 Dec - 03 Jan Icelandair direct

Also check the deals for one-way flights from Frankfurt to Keflavik in December.

Skyscanner

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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