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

Return flights

24 Mar - 01 Apr	SWISS
22 Mar - 29 Mar	Finnair
30 Mar - 10 Apr	Finnair
07 Mar - 14 Mar	Finnair
08 Mar - 15 Mar	Finnair
11 Mar - 18 Mar	Icelandair	direct
07 Mar - 14 Mar	Icelandair	direct
08 Mar - 15 Mar	Icelandair	direct
04 Mar - 11 Mar	Icelandair	direct
22 Mar - 29 Mar	Icelandair	direct
09 Mar - 14 Mar	Icelandair	direct
13 Mar - 22 Mar	Icelandair	direct
27 Mar - 03 Apr	Icelandair	direct
30 Mar - 10 Apr	Icelandair	direct
28 Mar - 05 Apr	Icelandair	direct
28 Mar - 04 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.

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Cheapest return flights from New York to Keflavik in March from 315€

Return flights