Cheapest one-way flights from Washington to Keflavik in May from 373€

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

One-Way flights

25 May Porter Airlines (Canada) Ltd
06 May Frontier Airlines
31 May Icelandair direct
10 May Icelandair direct
04 May Icelandair direct
06 May Icelandair direct
27 May Porter Airlines (Canada) Ltd
27 May Icelandair direct
25 May Icelandair direct
21 May Air France

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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