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

Return flights

31 Jan - 08 Feb	Air Canada
30 Jan - 07 Feb	jetBlue
29 Jan - 06 Feb	jetBlue
29 Jan - 02 Feb	Scandinavian Airlines
28 Jan - 05 Feb	jetBlue
30 Jan - 05 Feb	Icelandair
30 Jan - 02 Feb	jetBlue
30 Jan - 03 Feb	Icelandair
29 Jan - 01 Feb	jetBlue
27 Jan - 07 Feb	Scandinavian Airlines
23 Jan - 26 Jan	jetBlue
21 Jan - 25 Jan	Frontier Airlines
20 Jan - 27 Jan	Icelandair
21 Jan - 28 Jan	Icelandair
19 Jan - 22 Jan	jetBlue
19 Jan - 26 Jan	jetBlue
21 Jan - 27 Jan	Icelandair
18 Jan - 20 Jan	Frontier Airlines
19 Jan - 21 Jan	Iberia
16 Jan - 20 Jan	TAP

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 518€

Return flights