AirHint found the following cheapest return flights from Nashville (BNA) to Madrid (MAD) in September 2025 (see full year).

Return flights

06 Sep - 20 Sep	Spirit Airlines
14 Sep - 22 Sep	Spirit Airlines
26 Sep - 05 Oct	Spirit Airlines
19 Sep - 26 Sep	United
22 Sep - 29 Sep	United
10 Sep - 17 Sep	United
16 Sep - 23 Sep	United
27 Sep - 04 Oct	United
07 Sep - 14 Sep	United
04 Sep - 11 Sep	United
01 Sep - 08 Sep	United
13 Sep - 20 Sep	United

Also check the deals for one-way flights from Nashville to Madrid in September.

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 Madrid in September from $537

Return flights