| Blackwells Mills to Opwijk | 3,683.55 mi (5,928.10 km) |
| Blackwells Mills to Ostend | 3,625.94 mi (5,835.38 km) |
| Blackwells Mills to Oud-Heverlee | 3,706.53 mi (5,965.08 km) |
| Blackwells Mills to Oud-Turnhout | 3,706.88 mi (5,965.65 km) |
| Blackwells Mills to Oudenaarde | 3,662.82 mi (5,894.74 km) |
| Blackwells Mills to Oudenburg | 3,630.23 mi (5,842.30 km) |
| Blackwells Mills to Oupeye | 3,749.29 mi (6,033.90 km) |
| Blackwells Mills to Overijse | 3,702.41 mi (5,958.45 km) |
| Blackwells Mills to Overpelt | 3,726.84 mi (5,997.77 km) |
| Blackwells Mills to Paal | 3,721.64 mi (5,989.41 km) |
| Blackwells Mills to Peer | 3,730.50 mi (6,003.67 km) |
| Blackwells Mills to Pepinster | 3,760.08 mi (6,051.26 km) |
| Blackwells Mills to Peruwelz | 3,670.52 mi (5,907.13 km) |
| Blackwells Mills to Perwez | 3,717.96 mi (5,983.47 km) |
| Blackwells Mills to Philippeville | 3,718.21 mi (5,983.88 km) |
