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

Return flights

16 Oct - 26 Oct	Ryanair
16 Oct - 22 Oct	Ryanair
09 Oct - 16 Oct	Ryanair
09 Oct - 17 Oct	Ryanair
16 Oct - 23 Oct	Ryanair
30 Oct - 06 Nov	Ryanair
23 Oct - 01 Nov	Ryanair
23 Oct - 31 Oct	Ryanair
27 Oct - 06 Nov	Ryanair
31 Oct - 10 Nov	Ryanair
20 Oct - 28 Oct	Ryanair
09 Oct - 12 Oct	Ryanair
20 Oct - 26 Oct	Ryanair
08 Oct - 17 Oct	Ryanair
29 Oct - 06 Nov	Ryanair
28 Oct - 06 Nov	Ryanair
27 Oct - 05 Nov	Ryanair
31 Oct - 09 Nov	Ryanair
27 Oct - 04 Nov	easyJet
29 Oct - 05 Nov	Ryanair

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 $221

Return flights