AirHint found the following cheapest return flights from New York (NYC) to Keflavik (KEF) in August 2025 (see full year).

Return flights

25 Aug - 28 Aug	Fly Play	direct
25 Aug - 03 Sep	Delta	direct
24 Aug - 28 Aug	Air France	direct
26 Aug - 31 Aug	SWISS
27 Aug - 03 Sep	Air Canada
25 Aug - 29 Aug	Air France
27 Aug - 31 Aug	Air Canada
25 Aug - 31 Aug	United
30 Aug - 04 Sep	Icelandair	direct
25 Aug - 01 Sep	Air Canada
28 Aug - 04 Sep	Air Canada
28 Aug - 20 Sep	Air Canada
28 Aug - 03 Sep	Air Canada
28 Aug - 31 Aug	Air Canada
30 Aug - 06 Sep	Fly Play
28 Aug - 01 Sep	Air Canada
24 Aug - 02 Sep	Air France	direct
24 Aug - 30 Aug	United
24 Aug - 27 Aug	United	direct
27 Aug - 30 Aug	Brussels Airlines	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 $391

Return flights