| Philadelphia to Collegno | 4,035.57 mi (6,494.62 km) |
| Philadelphia to Cologno al Serio | 4,111.38 mi (6,616.63 km) |
| Philadelphia to Cologno Monzese | 4,095.06 mi (6,590.36 km) |
| Philadelphia to Colorno | 4,161.83 mi (6,697.82 km) |
| Philadelphia to Comacchio | 4,246.85 mi (6,834.64 km) |
| Philadelphia to Comiso | 4,635.42 mi (7,459.99 km) |
| Philadelphia to Como | 4,077.86 mi (6,562.68 km) |
| Philadelphia to Concordia Sagittaria | 4,238.99 mi (6,822.00 km) |
| Philadelphia to Concorezzo | 4,095.58 mi (6,591.19 km) |
| Philadelphia to Conegliano | 4,211.71 mi (6,778.09 km) |
| Philadelphia to Conselice | 4,238.06 mi (6,820.50 km) |
| Philadelphia to Conselve | 4,215.35 mi (6,783.95 km) |
| Philadelphia to Conversano | 4,594.57 mi (7,394.25 km) |
| Philadelphia to Copertino | 4,662.15 mi (7,503.00 km) |
| Philadelphia to Copparo | 4,225.12 mi (6,799.68 km) |
