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

Return flights

06 Aug - 13 Aug	Icelandair	direct
11 Aug - 25 Aug	Icelandair	direct
08 Aug - 13 Aug	Icelandair	direct
21 Aug - 24 Aug	Air Canada
13 Aug - 17 Aug	Icelandair	direct
22 Aug - 25 Aug	Air Canada
04 Aug - 10 Aug	Spirit Airlines
14 Aug - 18 Aug	Air Canada
22 Aug - 25 Aug	Icelandair	direct
03 Aug - 10 Aug	Spirit Airlines

Also check the deals for one-way flights from Nashville 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 Nashville to Keflavik in August from 350€

Return flights