| Chapel Hill to Oerlinghausen | 4,226.80 mi (6,802.38 km) |
| Chapel Hill to Oestrich-Winkel | 4,252.80 mi (6,844.22 km) |
| Chapel Hill to Offenburg | 4,292.23 mi (6,907.68 km) |
| Chapel Hill to Oftersheim | 4,294.09 mi (6,910.66 km) |
| Chapel Hill to Ohrdruf | 4,339.85 mi (6,984.31 km) |
| Chapel Hill to Ohringen | 4,336.55 mi (6,979.01 km) |
| Chapel Hill to Olbernhau | 4,447.38 mi (7,157.37 km) |
| Chapel Hill to Olching | 4,440.94 mi (7,147.00 km) |
| Chapel Hill to Oldenburg | 4,178.58 mi (6,724.78 km) |
| Chapel Hill to Oldenburg in Holstein | 4,249.35 mi (6,838.66 km) |
| Chapel Hill to Olfen | 4,182.60 mi (6,731.25 km) |
| Chapel Hill to Olpe | 4,218.83 mi (6,789.54 km) |
| Chapel Hill to Olsberg | 4,235.96 mi (6,817.11 km) |
| Chapel Hill to Oranienburg | 4,381.12 mi (7,050.73 km) |
| Chapel Hill to Ortenberg | 4,285.93 mi (6,897.53 km) |
