| Norristown to Collegno | 4,040.00 mi (6,501.76 km) |
| Norristown to Cologno al Serio | 4,115.52 mi (6,623.30 km) |
| Norristown to Cologno Monzese | 4,099.25 mi (6,597.10 km) |
| Norristown to Colorno | 4,166.06 mi (6,704.63 km) |
| Norristown to Comacchio | 4,250.97 mi (6,841.28 km) |
| Norristown to Comiso | 4,640.92 mi (7,468.83 km) |
| Norristown to Como | 4,082.00 mi (6,569.35 km) |
| Norristown to Concordia Sagittaria | 4,242.82 mi (6,828.16 km) |
| Norristown to Concorezzo | 4,099.75 mi (6,597.91 km) |
| Norristown to Conegliano | 4,215.56 mi (6,784.28 km) |
| Norristown to Conselice | 4,242.26 mi (6,827.26 km) |
| Norristown to Conselve | 4,219.38 mi (6,790.44 km) |
| Norristown to Conversano | 4,599.02 mi (7,401.40 km) |
| Norristown to Copertino | 4,666.64 mi (7,510.23 km) |
| Norristown to Copparo | 4,229.23 mi (6,806.29 km) |
