| Holladay to Opwijk | 5,026.07 mi (8,088.68 km) |
| Holladay to Ostend | 4,974.19 mi (8,005.18 km) |
| Holladay to Oud-Heverlee | 5,047.54 mi (8,123.22 km) |
| Holladay to Oud-Turnhout | 5,033.73 mi (8,101.01 km) |
| Holladay to Oudenaarde | 5,013.50 mi (8,068.45 km) |
| Holladay to Oudenburg | 4,978.74 mi (8,012.51 km) |
| Holladay to Oupeye | 5,083.77 mi (8,181.53 km) |
| Holladay to Overijse | 5,045.83 mi (8,120.48 km) |
| Holladay to Overpelt | 5,051.86 mi (8,130.19 km) |
| Holladay to Paal | 5,053.09 mi (8,132.17 km) |
| Holladay to Peer | 5,057.10 mi (8,138.62 km) |
| Holladay to Pepinster | 5,096.08 mi (8,201.34 km) |
| Holladay to Peruwelz | 5,029.01 mi (8,093.41 km) |
| Holladay to Perwez | 5,062.33 mi (8,147.03 km) |
| Holladay to Philippeville | 5,074.74 mi (8,167.00 km) |
