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

Return flights

09 May - 17 May	KLM
09 May - 16 May	KLM
11 May - 18 May	KLM
12 May - 19 May	Virgin Atlantic
12 May - 29 May	Delta
10 May - 17 May	KLM
16 May - 23 May	Virgin Atlantic
15 May - 21 May	KLM
17 May - 24 May	Virgin Atlantic
14 May - 21 May	Delta
26 May - 02 Jun	Icelandair	direct
28 May - 04 Jun	Icelandair	direct
27 May - 03 Jun	Icelandair	direct
29 May - 05 Jun	Icelandair	direct
30 May - 06 Jun	Icelandair	direct
31 May - 07 Jun	Icelandair	direct
28 May - 03 Jun	Icelandair	direct
30 May - 10 Jun	Icelandair	direct
29 May - 12 Jun	Air France
30 May - 13 Jun	Air France

Also check the deals for one-way flights from Newark to Keflavik in May.

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 May from 355€

Return flights