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

Return flights

08 Oct - 11 Oct	Spirit Airlines
01 Oct - 06 Oct	Spirit Airlines
01 Oct - 17 Oct	Spirit Airlines
08 Oct - 15 Oct	Spirit Airlines
07 Oct - 14 Oct	Spirit Airlines
20 Oct - 26 Oct	Spirit Airlines
29 Oct - 10 Nov	Spirit Airlines
28 Oct - 22 Nov	Spirit Airlines
06 Oct - 13 Oct	Spirit Airlines
18 Oct - 27 Oct	Frontier Airlines
22 Oct - 12 Nov	Spirit Airlines
21 Oct - 11 Nov	Spirit Airlines
18 Oct - 09 Nov	Spirit Airlines
14 Oct - 28 Oct	Spirit Airlines
15 Oct - 29 Oct	Spirit Airlines

Also check the deals for one-way flights from Fort Lauderdale 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 Fort Lauderdale to Keflavik in October from 284€

Return flights