Cheapest return flights from Atlanta to Keflavik in September from $681

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

Return flights

10 Sep - 14 Sep jetBlue
01 Sep - 09 Sep United
08 Sep - 16 Sep United
08 Sep - 15 Sep United
07 Sep - 15 Sep United
01 Sep - 08 Sep United
02 Sep - 10 Sep Air Canada
17 Sep - 23 Sep Scandinavian Airlines
04 Sep - 12 Sep Frontier Airlines
03 Sep - 11 Sep jetBlue

Also check the deals for one-way flights from Atlanta 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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