| Mount Washington to Collegno | 4,563.33 mi (7,343.97 km) |
| Mount Washington to Cologno al Serio | 4,633.74 mi (7,457.28 km) |
| Mount Washington to Cologno Monzese | 4,618.32 mi (7,432.47 km) |
| Mount Washington to Colorno | 4,685.69 mi (7,540.90 km) |
| Mount Washington to Comacchio | 4,768.60 mi (7,674.33 km) |
| Mount Washington to Comiso | 5,179.32 mi (8,335.31 km) |
| Mount Washington to Como | 4,600.28 mi (7,403.44 km) |
| Mount Washington to Concordia Sagittaria | 4,755.23 mi (7,652.80 km) |
| Mount Washington to Concorezzo | 4,618.50 mi (7,432.76 km) |
| Mount Washington to Conegliano | 4,728.42 mi (7,609.65 km) |
| Mount Washington to Conselice | 4,761.14 mi (7,662.32 km) |
| Mount Washington to Conselve | 4,735.51 mi (7,621.06 km) |
| Mount Washington to Conversano | 5,121.39 mi (8,242.07 km) |
| Mount Washington to Copertino | 5,189.63 mi (8,351.91 km) |
| Mount Washington to Copparo | 4,746.68 mi (7,639.04 km) |
