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

Return flights

13 Jan - 20 Jan	jetBlue
14 Jan - 21 Jan	jetBlue
20 Jan - 27 Jan	jetBlue
21 Jan - 28 Jan	jetBlue
17 Jan - 24 Jan	jetBlue
15 Jan - 22 Jan	jetBlue
22 Jan - 29 Jan	jetBlue
24 Jan - 31 Jan	jetBlue
23 Jan - 30 Jan	jetBlue
13 Jan - 19 Jan	Scandinavian Airlines
25 Jan - 01 Feb	jetBlue
29 Jan - 02 Feb	British Airways

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 418€

Return flights