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

Return flights

11 Oct - 18 Oct	Spirit Airlines
11 Oct - 17 Oct	Spirit Airlines
18 Oct - 24 Oct	Spirit Airlines
08 Oct - 18 Oct	Spirit Airlines
12 Oct - 18 Oct	Frontier Airlines
02 Oct - 23 Oct	Frontier Airlines
12 Oct - 17 Oct	Frontier Airlines
11 Oct - 16 Oct	Spirit Airlines
13 Oct - 17 Oct	Spirit Airlines
24 Oct - 31 Oct	Icelandair	direct
06 Oct - 01 Nov	Icelandair	direct

Also check the deals for one-way flights from Orlando 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 Orlando to Keflavik in October from $336

Return flights