Cheapest return flights from Washington to Keflavik in August from $534

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

Return flights

12 Aug - 26 Aug United direct
19 Aug - 04 Sep Scandinavian Airlines
19 Aug - 04 Sep Icelandair direct
09 Aug - 23 Aug SWISS
04 Aug - 12 Aug Air Canada
08 Aug - 16 Aug Lufthansa
07 Aug - 15 Aug Lufthansa
07 Aug - 10 Aug SWISS
04 Aug - 12 Aug Icelandair direct
09 Aug - 23 Aug Icelandair direct
07 Aug - 10 Aug Icelandair direct
07 Aug - 15 Aug Icelandair direct

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

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