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

Return flights

10 Jan - 16 Jan	Ryanair
25 Jan - 02 Feb	Ryanair
24 Jan - 02 Feb	Ryanair
26 Jan - 01 Feb	Ryanair
31 Jan - 07 Feb	Ryanair
09 Jan - 17 Jan	Ryanair
10 Jan - 17 Jan	Ryanair
25 Jan - 01 Feb	Ryanair
12 Jan - 17 Jan	Ryanair
13 Jan - 17 Jan	Ryanair
23 Jan - 02 Feb	Ryanair
03 Jan - 12 Jan	Ryanair
17 Jan - 24 Jan	Ryanair
16 Jan - 24 Jan	Ryanair
10 Jan - 13 Jan	Ryanair
09 Jan - 18 Jan	Ryanair
24 Jan - 01 Feb	Scandinavian Airlines
23 Jan - 01 Feb	Lufthansa	direct
30 Jan - 08 Feb	Lufthansa	direct
29 Jan - 07 Feb	Scandinavian Airlines

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

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 January from $231

Return flights