| Brent to Oerlinghausen | 4,825.21 mi (7,765.42 km) |
| Brent to Oestrich-Winkel | 4,854.32 mi (7,812.27 km) |
| Brent to Offenburg | 4,895.45 mi (7,878.46 km) |
| Brent to Oftersheim | 4,896.15 mi (7,879.59 km) |
| Brent to Ohrdruf | 4,939.13 mi (7,948.76 km) |
| Brent to Ohringen | 4,938.50 mi (7,947.75 km) |
| Brent to Olbernhau | 5,045.68 mi (8,120.23 km) |
| Brent to Olching | 5,043.35 mi (8,116.48 km) |
| Brent to Oldenburg | 4,775.12 mi (7,684.81 km) |
| Brent to Oldenburg in Holstein | 4,842.17 mi (7,792.72 km) |
| Brent to Olfen | 4,781.94 mi (7,695.79 km) |
| Brent to Olpe | 4,819.04 mi (7,755.49 km) |
| Brent to Olsberg | 4,835.42 mi (7,781.85 km) |
| Brent to Oranienburg | 4,975.79 mi (8,007.76 km) |
| Brent to Ortenberg | 4,886.59 mi (7,864.20 km) |
