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

Return flights

11 Aug - 25 Aug	United
11 Aug - 22 Aug	United
12 Aug - 24 Aug	Air Canada
27 Aug - 07 Sep	Brussels Airlines	direct
23 Aug - 30 Aug	United	direct
20 Aug - 01 Sep	United	direct
18 Aug - 31 Aug	United
17 Aug - 26 Aug	Finnair
29 Aug - 06 Sep	Air Canada
13 Aug - 27 Aug	Finnair
04 Aug - 15 Sep	Air Canada
11 Aug - 18 Aug	United
29 Aug - 06 Sep	Icelandair	direct
13 Aug - 27 Aug	Icelandair	direct
08 Aug - 18 Aug	SWISS
04 Aug - 15 Sep	Icelandair	direct

Also check the deals for one-way flights from New York to Keflavik in August.

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 August from 336€

Return flights