| Ashtabula to Oerlinghausen | 4,006.55 mi (6,447.92 km) |
| Ashtabula to Oestrich-Winkel | 4,046.91 mi (6,512.87 km) |
| Ashtabula to Offenburg | 4,096.71 mi (6,593.01 km) |
| Ashtabula to Oftersheim | 4,091.12 mi (6,584.02 km) |
| Ashtabula to Ohrdruf | 4,122.81 mi (6,635.02 km) |
| Ashtabula to Ohringen | 4,132.69 mi (6,650.93 km) |
| Ashtabula to Olbernhau | 4,225.80 mi (6,800.77 km) |
| Ashtabula to Olching | 4,239.37 mi (6,822.60 km) |
| Ashtabula to Oldenburg | 3,951.43 mi (6,359.22 km) |
| Ashtabula to Oldenburg in Holstein | 4,009.93 mi (6,453.36 km) |
| Ashtabula to Olfen | 3,966.49 mi (6,383.45 km) |
| Ashtabula to Olpe | 4,006.50 mi (6,447.85 km) |
| Ashtabula to Olsberg | 4,020.13 mi (6,469.77 km) |
| Ashtabula to Oranienburg | 4,146.90 mi (6,673.79 km) |
| Ashtabula to Ortenberg | 4,075.47 mi (6,558.83 km) |
