AirHint found the following cheapest return flights from Newark (EWR) to Keflavik (KEF) in July 2025 (see full year).

Return flights

29 Jul - 07 Aug	United
31 Jul - 05 Aug	United
29 Jul - 03 Aug	United
29 Jul - 06 Aug	Air Canada
27 Jul - 03 Aug	United
24 Jul - 27 Jul	Air Canada
17 Jul - 23 Jul	United
18 Jul - 20 Jul	United	direct
17 Jul - 24 Jul	Air Canada
29 Jul - 07 Aug	Icelandair	direct
29 Jul - 06 Aug	Icelandair	direct
30 Jul - 04 Aug	Icelandair	direct
18 Jul - 21 Jul	Air Canada
19 Jul - 26 Jul	Air Canada
31 Jul - 08 Aug	United
17 Jul - 23 Jul	United	direct
17 Jul - 24 Jul	United	direct
21 Jul - 29 Jul	Delta
16 Jul - 22 Jul	Air France
23 Jul - 02 Aug	United	direct

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

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 July from 356€

Return flights