| North Decatur to Oerlinghausen | 4,537.95 mi (7,303.12 km) |
| North Decatur to Oestrich-Winkel | 4,568.12 mi (7,351.68 km) |
| North Decatur to Offenburg | 4,610.25 mi (7,419.49 km) |
| North Decatur to Oftersheim | 4,610.23 mi (7,419.44 km) |
| North Decatur to Ohrdruf | 4,652.10 mi (7,486.83 km) |
| North Decatur to Ohringen | 4,652.51 mi (7,487.49 km) |
| North Decatur to Olbernhau | 4,758.37 mi (7,657.85 km) |
| North Decatur to Olching | 4,757.60 mi (7,656.62 km) |
| North Decatur to Oldenburg | 4,487.48 mi (7,221.90 km) |
| North Decatur to Oldenburg in Holstein | 4,554.10 mi (7,329.11 km) |
| North Decatur to Olfen | 4,494.94 mi (7,233.91 km) |
| North Decatur to Olpe | 4,532.32 mi (7,294.06 km) |
| North Decatur to Olsberg | 4,548.44 mi (7,320.01 km) |
| North Decatur to Oranienburg | 4,687.87 mi (7,544.40 km) |
| North Decatur to Ortenberg | 4,600.02 mi (7,403.02 km) |
