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

Return flights

23 Mar - 31 Mar	SWISS
07 Mar - 14 Mar	Finnair
08 Mar - 15 Mar	Finnair
14 Mar - 21 Mar	Finnair
24 Mar - 31 Mar	Finnair
13 Mar - 17 Mar	SWISS
16 Mar - 11 Apr	British Airways
13 Mar - 20 Mar	SWISS
23 Mar - 31 Mar	Icelandair	direct
11 Mar - 17 Mar	Icelandair	direct
17 Mar - 24 Mar	Icelandair	direct
28 Mar - 06 Apr	Icelandair	direct
28 Mar - 04 Apr	Icelandair	direct
16 Mar - 11 Apr	Icelandair	direct
27 Mar - 03 Apr	Icelandair	direct
29 Mar - 05 Apr	Icelandair	direct

Also check the deals for one-way flights from New York to Keflavik in March.

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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Cheapest return flights from New York to Keflavik in March from $409

Return flights