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

Return flights

30 Mar - 07 Apr	Lufthansa
07 Mar - 14 Mar	jetBlue
31 Mar - 08 Apr	Scandinavian Airlines
08 Mar - 15 Mar	jetBlue
29 Mar - 06 Apr	Lufthansa
27 Mar - 04 Apr	jetBlue
28 Mar - 05 Apr	jetBlue
19 Mar - 23 Mar	Icelandair
26 Mar - 03 Apr	Icelandair

Also check the deals for one-way flights from Atlanta 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 Atlanta to Keflavik in March from $613

Return flights