Cheapest one-way flights from Washington to Keflavik in May from $410

AirHint found the following cheapest one-way flights from Washington (IAD) to Keflavik (KEF) in May 2026 (see full year).

One-Way flights

15 May Icelandair direct
16 May Icelandair direct
17 May Icelandair direct
27 May Icelandair direct
23 May Icelandair direct
21 May United direct
25 May United direct

Also check the deals for return 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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