Cheapest one-way flights from Washington to Keflavik in December from 311€

AirHint found the following cheapest one-way flights from Washington (IAD) to Keflavik (KEF) in December 2025 (see full year).

One-Way flights

04 Dec TAP
15 Dec TAP
04 Dec Icelandair direct
15 Dec Icelandair direct
18 Dec Icelandair direct
19 Dec Icelandair direct
21 Dec British Airways

Also check the deals for return flights from Washington to Keflavik in December.

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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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