Elected leaders and business leaders had a chance to see the improvements that will open to the public in late October.
The new concourse has two gates with Jetways, and a new restaurant, Tailwinds, that will open in the spring.
An expanded seating area can accommodate 125 people and also has charging stations.
About a half-million passengers use the airport each year.
Delta Air Lines offers daily flights to Atlanta and American Airlines operates daily flights to Charlotte.