| Business | Phone |
| Knox Air Inc 2055 Alcoa Hwy, Alcoa 37701 | (865) 980-1845 |
| Knox Air Inc 2221 Airport Hwy, Alcoa 37701 | (865) 970-3121 |
| Garrett Aviation 2221 Airport Hwy, Alcoa 37701 | (865) 980-0180 |
| Horizon Avionics 2361 Airport Hwy # 3, Alcoa 37701 | (865) 980-7858 |
| Cherokee Aviation Inc 2285 Alcoa Hwy, Alcoa 37701 | (865) 970-9000 |
| Aircraft Technicians Inc 2285 Airport Hwy, Alcoa 37701 | (865) 681-4553 |