Cheapest return flights from Washington to Keflavik in May from $542

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

Return flights

05 May - 12 May Icelandair direct
15 May - 19 May Icelandair direct
01 May - 08 May Icelandair direct
25 May - 31 May Icelandair direct
23 May - 30 May Icelandair direct
13 May - 20 May Icelandair direct
22 May - 29 May Icelandair direct
20 May - 25 May Icelandair direct
08 May - 15 May Icelandair direct
09 May - 16 May Icelandair direct
23 May - 11 Jun British Airways

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

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