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

Return flights

25 Jan - 31 Jan	Finnair
27 Jan - 05 Feb	Finnair
28 Jan - 05 Feb	Finnair
22 Jan - 29 Jan	Finnair
20 Jan - 27 Jan	Finnair
15 Jan - 25 Jan	Finnair
23 Jan - 30 Jan	British Airways
31 Jan - 06 Feb	Icelandair	direct
27 Jan - 05 Feb	Icelandair	direct
13 Jan - 20 Jan	Icelandair	direct
11 Jan - 16 Jan	Icelandair	direct
28 Jan - 05 Feb	Icelandair	direct
03 Jan - 24 Jan	Icelandair	direct
20 Jan - 27 Jan	Icelandair	direct
21 Jan - 27 Jan	Icelandair	direct
26 Jan - 02 Feb	Icelandair	direct
31 Jan - 07 Feb	Icelandair	direct

Also check the deals for one-way flights from New York 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 New York to Keflavik in January from $407

Return flights