Cheapest return flights from Washington to Keflavik in August from $551

Best time to book flights for Washington (IAD) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest return flights from Washington (IAD) to Keflavik (KEF) in August 2025 (see full year).

Return flights

23 Aug - 30 Aug Icelandair direct
18 Aug - 31 Aug Air Canada
19 Aug - 31 Aug Icelandair direct
18 Aug - 31 Aug Icelandair direct
21 Aug - 31 Aug Icelandair direct
09 Aug - 16 Aug Icelandair direct
26 Aug - 02 Sep Icelandair direct
28 Aug - 04 Sep Icelandair direct
30 Aug - 06 Sep Icelandair direct
05 Aug - 12 Aug Icelandair direct
11 Aug - 18 Aug Icelandair direct
29 Aug - 05 Sep Icelandair direct
07 Aug - 16 Aug Icelandair direct

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

Skyscanner

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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