Cheapest return flights from Los Angeles to Keflavik in September from $448

Best time to book flights for Los Angeles (LAX) to Keflavik (KEF) flights at AirHint

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

Return flights

09 Sep - 16 Sep Spirit Airlines
21 Sep - 28 Sep Spirit Airlines
08 Sep - 15 Sep Spirit Airlines
12 Sep - 19 Sep Spirit Airlines
09 Sep - 17 Sep Spirit Airlines
28 Sep - 05 Oct Spirit Airlines
06 Sep - 13 Sep Spirit Airlines
02 Sep - 09 Sep jetBlue
22 Sep - 29 Sep Spirit Airlines
13 Sep - 20 Sep Spirit Airlines
15 Sep - 22 Sep Spirit Airlines
29 Sep - 06 Oct Frontier Airlines
27 Sep - 04 Oct Spirit Airlines

Also check the deals for one-way flights from Los Angeles to Keflavik in September.

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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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