Cheapest return flights from Washington to Keflavik in September from 535€

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

Return flights

01 Sep - 08 Sep jetBlue
29 Sep - 06 Oct Icelandair
14 Sep - 21 Sep Air Canada
30 Sep - 07 Oct Scandinavian Airlines
15 Sep - 22 Sep Air Canada
16 Sep - 23 Sep Air Canada
23 Sep - 30 Sep Air Canada
03 Sep - 07 Sep Air Canada
30 Sep - 08 Oct British Airways
28 Sep - 03 Oct British Airways

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

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