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

Return flights

14 Jan - 18 Jan	Scandinavian Airlines
07 Jan - 11 Jan	Scandinavian Airlines
17 Jan - 07 Feb	Icelandair	direct
21 Jan - 14 Feb	Scandinavian Airlines
10 Jan - 17 Jan	Icelandair	direct
07 Jan - 11 Jan	Icelandair	direct
14 Jan - 18 Jan	Icelandair	direct
09 Jan - 13 Jan	Icelandair	direct
12 Jan - 19 Jan	Icelandair	direct
21 Jan - 14 Feb	Icelandair	direct
15 Jan - 19 Jan	Icelandair	direct
09 Jan - 16 Jan	Icelandair	direct
11 Jan - 18 Jan	Icelandair	direct

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

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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Cheapest return flights from Washington to Keflavik in January from $481

Return flights