| Howard to Opwijk | 4,019.56 mi (6,468.86 km) |
| Howard to Ostend | 3,963.73 mi (6,379.01 km) |
| Howard to Oud-Heverlee | 4,042.23 mi (6,505.34 km) |
| Howard to Oud-Turnhout | 4,035.32 mi (6,494.22 km) |
| Howard to Oudenaarde | 4,002.63 mi (6,441.60 km) |
| Howard to Oudenburg | 3,968.25 mi (6,386.28 km) |
| Howard to Oupeye | 4,082.51 mi (6,570.16 km) |
| Howard to Overijse | 4,039.27 mi (6,500.58 km) |
| Howard to Overpelt | 4,054.75 mi (6,525.50 km) |
| Howard to Paal | 4,052.74 mi (6,522.26 km) |
| Howard to Peer | 4,059.30 mi (6,532.81 km) |
| Howard to Pepinster | 4,094.29 mi (6,589.13 km) |
| Howard to Peruwelz | 4,014.53 mi (6,460.75 km) |
| Howard to Perwez | 4,055.62 mi (6,526.89 km) |
| Howard to Philippeville | 4,062.15 mi (6,537.40 km) |
