Nashville International Airport is no longer planning for the growth Nashville experienced over the past decade. It is planning for the growth coming next.

BNA handled a record 26.7 million passengers in fiscal year 2026, and airport planners are preparing for approximately 40 million annual passengers within the next decade. The current New Horizon program includes major improvements to concourses, roadways, parking, rental cars and terminal infrastructure. Beyond that program sits an even larger long-term idea: Terminal II.

The Metro Nashville Airport Authority has already approved an agreement framework for a Music City Loop connection at BNA. That means the question is no longer whether underground transportation belongs in BNA's long-range planning. It already does.

The question is whether Terminal II will be planned around it from the beginning.

Terminal II changes the transportation problem

A second terminal will do more than add gates. It will enlarge the physical footprint of BNA and create another major passenger destination somewhere within an airport campus already requiring significant roadway, parking and circulation infrastructure.

Those surface investments are necessary. But every additional road and parking space illustrates the same underlying challenge: airport growth generates ground transportation demand along with air travel demand. Terminal II gives BNA an opportunity to address part of that demand with a transportation system that does not require another surface lane.

The Loop should connect more than downtown to the airport

The first BNA Loop station will be valuable because it can connect airport passengers directly to Nashville destinations. But an airport this large should think beyond a single station.

A future internal airport network could potentially connect the existing terminal, Terminal II, long-term parking, rental cars and other major passenger facilities. That does not mean every airport trip belongs underground. It means BNA should preserve the option to use the infrastructure it is already bringing onto airport property.

Build the station box before the terminal sits on top of it

Transportation projects become dramatically more expensive when they have to be inserted underneath finished infrastructure. Construction phasing becomes more difficult. Passenger circulation cannot stop. Utilities are already in place. Structural columns and foundations limit options.

Terminal II is different because those constraints have not yet been permanently fixed. If a future Loop station is likely to make sense there, the airport does not necessarily need to construct the entire station immediately. But its design team should identify the likely station footprint, vertical circulation, tunnel approach, utility conflicts and structural clearances now.

An internal connection could be as important as the downtown one

The Music City Loop has largely been discussed as a way to get from BNA to Nashville. Terminal II introduces another use case: getting around BNA itself.

As the airport footprint grows, the distance between parking, rental cars, existing concourses and a future terminal will grow with it. Airports around the world spend enormous sums on internal people-mover systems because large campuses eventually require high-capacity internal transportation.

Nashville now has the unusual opportunity to consider whether infrastructure being built for citywide transportation could also become part of its airport circulation system.

Plan once, build intelligently

BNA is spending billions because airport leaders correctly understand that waiting until future passenger demand arrives would be too late. The same logic should govern Terminal II and the Music City Loop.

A second terminal will stand for generations. The underground transportation system reaching the airport is being built now. Those two projects should not discover one another after the concrete has been poured. They should be designed together.

SOURCES