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

Return flights

09 May - 17 May	Air France
19 May - 26 May	United
27 May - 03 Jun	United
15 May - 06 Jun	Air Canada
26 May - 02 Jun	United
28 May - 04 Jun	United
30 May - 06 Jun	United
29 May - 05 Jun	United
31 May - 07 Jun	United
01 May - 08 May	Porter Airlines (Canada) Ltd
22 May - 25 May	Porter Airlines (Canada) Ltd
02 May - 10 May	Porter Airlines (Canada) Ltd
06 May - 13 May	British Airways
03 May - 09 May	Air Canada
05 May - 12 May	Porter Airlines (Canada) Ltd
08 May - 15 May	WestJet

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

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 May from $442

Return flights