Cheapest return flights from Washington to Keflavik in September from 503€

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

Return flights

01 Sep - 08 Sep Icelandair direct
17 Sep - 24 Sep Icelandair direct
29 Sep - 04 Oct Icelandair direct
17 Sep - 22 Sep Icelandair direct
11 Sep - 16 Sep Icelandair direct
24 Sep - 08 Oct Icelandair direct
04 Sep - 13 Sep Icelandair direct
05 Sep - 13 Sep Icelandair direct
03 Sep - 07 Sep Icelandair direct
04 Sep - 10 Sep British Airways

Also check the deals for one-way flights from Washington to Keflavik in September.

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