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

Return flights

06 May - 13 May	Air France
04 May - 11 May	Delta
13 May - 20 May	Air France
11 May - 17 May	Delta
06 May - 13 May	Icelandair	direct
18 May - 24 May	Icelandair	direct
11 May - 17 May	Icelandair	direct
04 May - 11 May	Icelandair	direct
18 May - 25 May	Icelandair	direct
13 May - 20 May	Icelandair	direct
24 May - 01 Jun	Icelandair	direct
25 May - 02 Jun	Air France
26 May - 03 Jun	KLM
27 May - 04 Jun	Air France
28 May - 05 Jun	KLM

Also check the deals for one-way flights from Nashville 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 Nashville to Keflavik in May from $503

Return flights