| Knoxville to Collegno | 4,586.27 mi (7,380.90 km) |
| Knoxville to Cologno al Serio | 4,660.43 mi (7,500.23 km) |
| Knoxville to Cologno Monzese | 4,644.39 mi (7,474.43 km) |
| Knoxville to Colorno | 4,711.39 mi (7,582.25 km) |
| Knoxville to Comacchio | 4,795.76 mi (7,718.03 km) |
| Knoxville to Comiso | 5,189.81 mi (8,352.20 km) |
| Knoxville to Como | 4,626.91 mi (7,446.29 km) |
| Knoxville to Concordia Sagittaria | 4,785.96 mi (7,702.26 km) |
| Knoxville to Concorezzo | 4,644.80 mi (7,475.08 km) |
| Knoxville to Conegliano | 4,758.84 mi (7,658.61 km) |
| Knoxville to Conselice | 4,787.41 mi (7,704.59 km) |
| Knoxville to Conselve | 4,763.70 mi (7,666.44 km) |
| Knoxville to Conversano | 5,145.24 mi (8,280.46 km) |
| Knoxville to Copertino | 5,213.03 mi (8,389.57 km) |
| Knoxville to Copparo | 4,773.96 mi (7,682.94 km) |
