| Quincy to Collegno | 3,771.54 mi (6,069.70 km) |
| Quincy to Cologno al Serio | 3,847.14 mi (6,191.38 km) |
| Quincy to Cologno Monzese | 3,830.84 mi (6,165.14 km) |
| Quincy to Colorno | 3,897.64 mi (6,272.65 km) |
| Quincy to Comacchio | 3,982.60 mi (6,409.38 km) |
| Quincy to Comiso | 4,373.39 mi (7,038.30 km) |
| Quincy to Como | 3,813.62 mi (6,137.43 km) |
| Quincy to Concordia Sagittaria | 3,974.69 mi (6,396.65 km) |
| Quincy to Concorezzo | 3,831.35 mi (6,165.97 km) |
| Quincy to Conegliano | 3,947.41 mi (6,352.74 km) |
| Quincy to Conselice | 3,973.85 mi (6,395.30 km) |
| Quincy to Conselve | 3,951.07 mi (6,358.63 km) |
| Quincy to Conversano | 4,330.55 mi (6,969.35 km) |
| Quincy to Copertino | 4,398.17 mi (7,078.17 km) |
| Quincy to Copparo | 3,960.87 mi (6,374.40 km) |
