| Holyoke to Opwijk | 3,529.34 mi (5,679.92 km) |
| Holyoke to Ostend | 3,471.75 mi (5,587.25 km) |
| Holyoke to Oud-Heverlee | 3,552.32 mi (5,716.91 km) |
| Holyoke to Oud-Turnhout | 3,552.34 mi (5,716.94 km) |
| Holyoke to Oudenaarde | 3,508.77 mi (5,646.82 km) |
| Holyoke to Oudenburg | 3,476.07 mi (5,594.19 km) |
| Holyoke to Oupeye | 3,595.01 mi (5,785.61 km) |
| Holyoke to Overijse | 3,548.26 mi (5,710.36 km) |
| Holyoke to Overpelt | 3,572.30 mi (5,749.06 km) |
| Holyoke to Paal | 3,567.24 mi (5,740.92 km) |
| Holyoke to Peer | 3,576.00 mi (5,755.02 km) |
| Holyoke to Pepinster | 3,605.85 mi (5,803.06 km) |
| Holyoke to Peruwelz | 3,516.69 mi (5,659.56 km) |
| Holyoke to Perwez | 3,563.86 mi (5,735.47 km) |
| Holyoke to Philippeville | 3,564.42 mi (5,736.38 km) |
