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

Return flights

17 Aug - 26 Aug	Air France	direct
19 Aug - 24 Aug	Air Canada
20 Aug - 27 Aug	Air France
20 Aug - 27 Aug	Delta	direct
19 Aug - 24 Aug	Air France	direct
01 Aug - 08 Aug	KLM	direct
20 Aug - 31 Aug	Icelandair	direct
03 Aug - 10 Aug	Icelandair	direct
02 Aug - 09 Aug	Icelandair	direct
04 Aug - 08 Aug	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 329€

Return flights