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

Return flights

31 Aug - 08 Sep	Spirit Airlines
29 Aug - 06 Sep	Spirit Airlines
29 Aug - 05 Sep	Spirit Airlines
30 Aug - 06 Sep	Spirit Airlines
28 Aug - 05 Sep	Frontier Airlines
20 Aug - 13 Sep	Frontier Airlines
28 Aug - 20 Sep	Frontier Airlines
26 Aug - 03 Sep	Spirit Airlines
24 Aug - 30 Aug	Spirit Airlines
30 Aug - 03 Sep	Spirit Airlines
31 Aug - 07 Sep	Spirit Airlines
23 Aug - 26 Aug	Spirit Airlines
19 Aug - 26 Aug	Frontier Airlines
20 Aug - 27 Aug	Spirit Airlines
18 Aug - 25 Aug	Air France
19 Aug - 25 Aug	Delta
17 Aug - 21 Aug	Frontier Airlines
28 Aug - 31 Aug	Air Canada

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

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 August from 375€

Return flights