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

Return flights

05 Mar - 14 Mar	Austrian Airlines
07 Mar - 14 Mar	Finnair
01 Mar - 08 Mar	Finnair
11 Mar - 18 Mar	Finnair
04 Mar - 28 Mar	Finnair
14 Mar - 21 Mar	Finnair
14 Mar - 22 Mar	Finnair
19 Mar - 28 Mar	Finnair
24 Mar - 31 Mar	Finnair
21 Mar - 29 Mar	Finnair
09 Mar - 04 Apr	Icelandair	direct
13 Mar - 04 Apr	Icelandair	direct
27 Mar - 04 Apr	Icelandair	direct
30 Mar - 04 Apr	Scandinavian Airlines
30 Mar - 04 Apr	Icelandair	direct
30 Mar - 08 Apr	Delta	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 366€

Return flights