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

Return flights

17 Oct - 24 Oct	Spirit Airlines
18 Oct - 24 Oct	Spirit Airlines
16 Oct - 23 Oct	Frontier Airlines
29 Oct - 05 Nov	Frontier Airlines
17 Oct - 27 Oct	Spirit Airlines
02 Oct - 05 Oct	Spirit Airlines
27 Oct - 31 Oct	Frontier Airlines
17 Oct - 25 Oct	Spirit Airlines
11 Oct - 27 Oct	Flair Airlines
22 Oct - 28 Oct	Spirit Airlines
06 Oct - 13 Oct	Air Canada
17 Oct - 08 Nov	jetBlue
22 Oct - 01 Nov	Lufthansa
27 Oct - 04 Nov	Frontier Airlines

Also check the deals for one-way flights from Los Angeles 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 Los Angeles to Keflavik in October from $418

Return flights