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

Return flights

10 Mar - 18 Mar	SWISS
21 Mar - 27 Mar	Icelandair	direct
11 Mar - 19 Mar	Lufthansa
12 Mar - 19 Mar	Finnair
14 Mar - 21 Mar	Finnair
26 Mar - 04 Apr	Finnair
10 Mar - 18 Mar	Icelandair	direct
13 Mar - 21 Mar	British Airways
19 Mar - 02 Apr	Lufthansa
11 Mar - 18 Mar	Icelandair	direct
11 Mar - 19 Mar	Icelandair	direct
02 Mar - 09 Mar	Icelandair	direct
19 Mar - 02 Apr	Icelandair	direct
26 Mar - 04 Apr	Icelandair	direct
29 Mar - 12 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 $395

Return flights