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

Return flights

07 Jan - 15 Jan	British Airways
27 Jan - 04 Feb	British Airways
28 Jan - 05 Feb	British Airways
06 Jan - 14 Jan	British Airways
14 Jan - 28 Jan	British Airways
11 Jan - 19 Jan	British Airways
10 Jan - 18 Jan	Scandinavian Airlines
31 Jan - 08 Feb	Scandinavian Airlines
29 Jan - 06 Feb	British Airways
08 Jan - 16 Jan	British Airways
11 Jan - 25 Jan	British Airways
09 Jan - 17 Jan	British Airways
30 Jan - 07 Feb	British Airways
01 Jan - 09 Jan	British Airways
04 Jan - 12 Jan	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 517€

Return flights