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

Return flights

26 Aug - 03 Sep	jetBlue
31 Aug - 08 Sep	Spirit Airlines
31 Aug - 07 Sep	Allegiant Air
30 Aug - 07 Sep	Allegiant Air
29 Aug - 05 Sep	Spirit Airlines
30 Aug - 06 Sep	Allegiant Air
27 Aug - 04 Sep	Spirit Airlines
26 Aug - 02 Sep	jetBlue
27 Aug - 03 Sep	Spirit Airlines
29 Aug - 06 Sep	Spirit Airlines
21 Aug - 25 Aug	Allegiant Air

Also check the deals for one-way flights from Nashville to Lisbon 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 Lisbon in August from 639€

Return flights