| Olney to Cortona | 4,405.83 mi (7,090.50 km) |
| Olney to Cosenza | 4,738.91 mi (7,626.54 km) |
| Olney to Cossato | 4,164.48 mi (6,702.08 km) |
| Olney to Costa Volpino | 4,238.69 mi (6,821.52 km) |
| Olney to Creazzo | 4,307.22 mi (6,931.79 km) |
| Olney to Crema | 4,236.01 mi (6,817.20 km) |
| Olney to Cremona | 4,258.63 mi (6,853.61 km) |
| Olney to Crevalcore | 4,320.37 mi (6,952.97 km) |
| Olney to Crispiano | 4,732.31 mi (7,615.92 km) |
| Olney to Crosia | 4,751.57 mi (7,646.91 km) |
| Olney to Crotone | 4,785.77 mi (7,701.95 km) |
| Olney to Cuneo | 4,175.14 mi (6,719.24 km) |
| Olney to Cuorgne | 4,147.73 mi (6,675.13 km) |
| Olney to Cusano Milanino | 4,208.67 mi (6,773.20 km) |
| Olney to Cutro | 4,781.77 mi (7,695.52 km) |
