| Sumner to Castrovillari | 5,902.74 mi (9,499.54 km) |
| Sumner to Catania | 6,017.82 mi (9,684.75 km) |
| Sumner to Catanzaro | 5,968.92 mi (9,606.05 km) |
| Sumner to Cattolica | 5,565.93 mi (8,957.50 km) |
| Sumner to Cava de' Tirreni | 5,812.21 mi (9,353.85 km) |
| Sumner to Cavallino | 5,918.62 mi (9,525.10 km) |
| Sumner to Cavarzere | 5,479.74 mi (8,818.79 km) |
| Sumner to Cave | 5,700.75 mi (9,174.47 km) |
| Sumner to Cavriago | 5,467.90 mi (8,799.73 km) |
| Sumner to Cavriglia | 5,562.27 mi (8,951.60 km) |
| Sumner to Cazzago San Martino | 5,402.89 mi (8,695.11 km) |
| Sumner to Ceccano | 5,725.82 mi (9,214.82 km) |
| Sumner to Cecina | 5,549.87 mi (8,931.66 km) |
| Sumner to Cefalu | 5,957.90 mi (9,588.32 km) |
| Sumner to Ceglie Messapico | 5,881.83 mi (9,465.89 km) |
