| Holbrook to Oerlinghausen | 3,760.99 mi (6,052.73 km) |
| Holbrook to Oestrich-Winkel | 3,788.26 mi (6,096.61 km) |
| Holbrook to Offenburg | 3,829.07 mi (6,162.29 km) |
| Holbrook to Oftersheim | 3,829.91 mi (6,163.65 km) |
| Holbrook to Ohrdruf | 3,874.29 mi (6,235.07 km) |
| Holbrook to Ohringen | 3,872.30 mi (6,231.86 km) |
| Holbrook to Olbernhau | 3,981.55 mi (6,407.69 km) |
| Holbrook to Olching | 3,977.03 mi (6,400.41 km) |
| Holbrook to Oldenburg | 3,712.42 mi (5,974.56 km) |
| Holbrook to Oldenburg in Holstein | 3,783.04 mi (6,088.21 km) |
| Holbrook to Olfen | 3,717.05 mi (5,982.02 km) |
| Holbrook to Olpe | 3,753.61 mi (6,040.85 km) |
| Holbrook to Olsberg | 3,770.45 mi (6,067.96 km) |
| Holbrook to Oranienburg | 3,914.81 mi (6,300.28 km) |
| Holbrook to Ortenberg | 3,820.92 mi (6,149.17 km) |
