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

Return flights

13 Oct - 17 Oct	Ryanair
23 Oct - 27 Oct	Ryanair
23 Oct - 26 Oct	Ryanair
07 Oct - 16 Oct	Ryanair
04 Oct - 10 Oct	Ryanair
18 Oct - 26 Oct	Ryanair
13 Oct - 19 Oct	Ryanair
07 Oct - 13 Oct	Wizz Air Malta
25 Oct - 27 Oct	Ryanair
27 Oct - 01 Nov	easyJet
18 Oct - 01 Nov	Ryanair
27 Oct - 31 Oct	Condor
27 Oct - 04 Nov	easyJet
31 Oct - 05 Nov	Ryanair
25 Oct - 01 Nov	Ryanair
25 Oct - 02 Nov	Ryanair
28 Oct - 01 Nov	Lufthansa
27 Oct - 02 Nov	easyJet
17 Oct - 03 Nov	Scandinavian Airlines
17 Oct - 03 Nov	Icelandair	direct

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

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 October from 169€

Return flights