Cheapest return flights from Washington to Keflavik in May from $436

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 May 2025 (see full year).

Return flights

04 May - 10 May Icelandair direct
06 May - 12 May Icelandair direct
08 May - 15 May Icelandair direct
12 May - 19 May Icelandair direct
12 May - 16 May Icelandair direct
05 May - 19 May Icelandair direct
24 May - 29 May Icelandair direct
24 May - 30 May Icelandair direct
05 May - 25 May Icelandair direct
01 May - 15 May Icelandair direct
26 May - 01 Jun Icelandair direct
23 May - 02 Jun Icelandair direct
22 May - 01 Jun Porter Airlines (Canada) Ltd
22 May - 01 Jun Icelandair direct

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

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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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