| Calera to Oerlinghausen | 4,667.72 mi (7,511.96 km) |
| Calera to Oestrich-Winkel | 4,700.54 mi (7,564.78 km) |
| Calera to Offenburg | 4,744.44 mi (7,635.44 km) |
| Calera to Oftersheim | 4,743.16 mi (7,633.39 km) |
| Calera to Ohrdruf | 4,782.50 mi (7,696.69 km) |
| Calera to Ohringen | 4,785.30 mi (7,701.20 km) |
| Calera to Olbernhau | 4,887.92 mi (7,866.35 km) |
| Calera to Olching | 4,890.82 mi (7,871.02 km) |
| Calera to Oldenburg | 4,615.88 mi (7,428.55 km) |
| Calera to Oldenburg in Holstein | 4,679.96 mi (7,531.66 km) |
| Calera to Olfen | 4,625.49 mi (7,444.00 km) |
| Calera to Olpe | 4,663.57 mi (7,505.29 km) |
| Calera to Olsberg | 4,679.05 mi (7,530.21 km) |
| Calera to Oranienburg | 4,814.85 mi (7,748.76 km) |
| Calera to Ortenberg | 4,731.63 mi (7,614.83 km) |
