AirHint found the following cheapest return flights from Los Angeles (LAX) to Keflavik (KEF) in March 2026 (see full year).

Return flights

18 Mar - 25 Mar	jetBlue
24 Mar - 31 Mar	jetBlue
08 Mar - 15 Mar	Alaska Airlines
20 Mar - 27 Mar	jetBlue
25 Mar - 01 Apr	jetBlue
05 Mar - 14 Mar	Hawaiian Airlines
23 Mar - 30 Mar	WestJet
07 Mar - 12 Mar	Hawaiian Airlines
07 Mar - 13 Mar	Hawaiian Airlines
08 Mar - 22 Mar	Aer Lingus
05 Mar - 15 Mar	Hawaiian Airlines
29 Mar - 07 Apr	KLM
30 Mar - 05 Apr	KLM
29 Mar - 11 Apr	Frontier Airlines

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

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 March from 440€

Return flights