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

Return flights

13 Oct - 20 Oct	Delta
30 Oct - 08 Nov	Spirit Airlines
07 Oct - 14 Oct	Spirit Airlines
03 Oct - 10 Oct	Spirit Airlines
03 Oct - 06 Oct	Spirit Airlines
11 Oct - 17 Oct	Spirit Airlines
11 Oct - 15 Oct	Spirit Airlines
12 Oct - 21 Oct	Spirit Airlines
13 Oct - 17 Oct	Air Canada
01 Oct - 22 Oct	Porter Airlines (Canada) Ltd
20 Oct - 01 Nov	Spirit Airlines
21 Oct - 01 Nov	Spirit Airlines
02 Oct - 05 Oct	Air Canada

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

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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Cheapest return flights from New York to Keflavik in October from $353

Return flights