| Quincy to Cortona | 4,023.20 mi (6,474.71 km) |
| Quincy to Cosenza | 4,356.55 mi (7,011.18 km) |
| Quincy to Cossato | 3,781.86 mi (6,086.31 km) |
| Quincy to Costa Volpino | 3,856.20 mi (6,205.95 km) |
| Quincy to Creazzo | 3,924.77 mi (6,316.30 km) |
| Quincy to Crema | 3,853.42 mi (6,201.49 km) |
| Quincy to Cremona | 3,876.04 mi (6,237.88 km) |
| Quincy to Crevalcore | 3,937.78 mi (6,337.24 km) |
| Quincy to Crispiano | 4,349.69 mi (7,000.15 km) |
| Quincy to Crosia | 4,369.10 mi (7,031.38 km) |
| Quincy to Crotone | 4,403.35 mi (7,086.51 km) |
| Quincy to Cuneo | 3,792.56 mi (6,103.54 km) |
| Quincy to Cuorgne | 3,765.10 mi (6,059.34 km) |
| Quincy to Cusano Milanino | 3,826.08 mi (6,157.48 km) |
| Quincy to Cutro | 4,399.38 mi (7,080.12 km) |
