The airline will add additional flights on Thursdays and Sundays starting March 31, 2019, according to reports in the US.
Flights will be operated by Boeing 787-8 Dreamliner aircraft, accommodating 214 passengers across three cabins - 154 economy, 25 premium economy and 35 business.
All passengers will receive free meals and drinks and a checked bag, and seats come with widescreen TV and on-demand entertainment options.
Sean Doyle, BA director of network and alliances, said: “We only launched this route earlier this year and it is testament to the appeal of the city and all that it offers that we’re able to increase our service in such a short timeframe.”
Doyle added it was the fastest BA has increased a new route to daily for 10 years.
Nashville became BA’s 26th US destination in May, and will add a 27th - Pittsburgh - in April 2019 when it launches a four-times weekly service.
