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

Return flights

21 Apr - 28 Apr	jetBlue
21 Apr - 29 Apr	jetBlue
15 Apr - 23 Apr	Lufthansa
13 Apr - 21 Apr	Lufthansa
22 Apr - 30 Apr	Lufthansa
01 Apr - 09 Apr	Finnair
20 Apr - 28 Apr	Finnair
01 Apr - 08 Apr	Finnair
22 Apr - 29 Apr	Finnair
06 Apr - 14 Apr	Finnair
29 Apr - 07 May	Lufthansa
27 Apr - 05 May	Finnair
28 Apr - 05 May	SWISS
27 Apr - 04 May	Finnair
28 Apr - 06 May	Finnair
26 Apr - 03 May	Virgin Atlantic
25 Apr - 03 May	Virgin Atlantic
26 Apr - 04 May	Finnair
25 Apr - 02 May	Virgin Atlantic
24 Apr - 02 May	Virgin Atlantic

Also check the deals for one-way flights from Atlanta to Keflavik in April.

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 April from 479€

Return flights