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

Return flights

14 Aug - 21 Aug	Air Canada
14 Aug - 20 Aug	Air Canada
21 Aug - 26 Aug	Air Canada
16 Aug - 23 Aug	Air Canada
20 Aug - 25 Aug	Air Canada
20 Aug - 24 Aug	Air Canada
21 Aug - 24 Aug	Air Canada
16 Aug - 24 Aug	Air Canada
19 Aug - 24 Aug	Air Canada
22 Aug - 24 Aug	Air Canada
28 Aug - 03 Sep	Air Canada
30 Aug - 13 Sep	Air Canada
29 Aug - 08 Sep	Air Canada
28 Aug - 05 Sep	Air Canada
17 Aug - 07 Sep	Air Canada
22 Aug - 01 Sep	Air Canada
28 Aug - 07 Sep	Air Canada
28 Aug - 01 Sep	Air Canada
19 Aug - 01 Sep	Air Canada
17 Aug - 01 Sep	Air Canada

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 $341

Return flights