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

Return flights

28 Mar - 11 Apr	Austrian Airlines
07 Mar - 13 Mar	Icelandair	direct
07 Mar - 14 Mar	British Airways
08 Mar - 15 Mar	British Airways
09 Mar - 16 Mar	British Airways
14 Mar - 28 Mar	Icelandair	direct
20 Mar - 24 Mar	Icelandair	direct
17 Mar - 22 Mar	Icelandair	direct
19 Mar - 02 Apr	Icelandair	direct
07 Mar - 14 Mar	Icelandair	direct
08 Mar - 15 Mar	Icelandair	direct
09 Mar - 16 Mar	Icelandair	direct

Also check the deals for one-way flights from Newark 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 Newark to Keflavik in March from $422

Return flights