| Knoxville to Castrovillari | 5,150.26 mi (8,288.54 km) |
| Knoxville to Catania | 5,190.80 mi (8,353.79 km) |
| Knoxville to Catanzaro | 5,203.72 mi (8,374.57 km) |
| Knoxville to Cattolica | 4,845.15 mi (7,797.52 km) |
| Knoxville to Cava de' Tirreni | 5,050.59 mi (8,128.15 km) |
| Knoxville to Cavallino | 5,217.51 mi (8,396.76 km) |
| Knoxville to Cavarzere | 4,776.10 mi (7,686.39 km) |
| Knoxville to Cave | 4,931.71 mi (7,936.83 km) |
| Knoxville to Cavriago | 4,725.77 mi (7,605.39 km) |
| Knoxville to Cavriglia | 4,807.67 mi (7,737.20 km) |
| Knoxville to Cazzago San Martino | 4,674.25 mi (7,522.47 km) |
| Knoxville to Ceccano | 4,958.38 mi (7,979.74 km) |
| Knoxville to Cecina | 4,772.88 mi (7,681.20 km) |
| Knoxville to Cefalu | 5,121.58 mi (8,242.39 km) |
| Knoxville to Ceglie Messapico | 5,174.16 mi (8,327.01 km) |
