| Sun Prairie to Opwijk | 4,126.47 mi (6,640.91 km) |
| Sun Prairie to Ostend | 4,070.50 mi (6,550.84 km) |
| Sun Prairie to Oud-Heverlee | 4,149.17 mi (6,677.45 km) |
| Sun Prairie to Oud-Turnhout | 4,142.58 mi (6,666.84 km) |
| Sun Prairie to Oudenaarde | 4,109.34 mi (6,613.34 km) |
| Sun Prairie to Oudenburg | 4,075.02 mi (6,558.10 km) |
| Sun Prairie to Oupeye | 4,189.60 mi (6,742.50 km) |
| Sun Prairie to Overijse | 4,146.15 mi (6,672.59 km) |
| Sun Prairie to Overpelt | 4,162.06 mi (6,698.19 km) |
| Sun Prairie to Paal | 4,159.90 mi (6,694.72 km) |
| Sun Prairie to Peer | 4,166.57 mi (6,705.45 km) |
| Sun Prairie to Pepinster | 4,201.35 mi (6,761.42 km) |
| Sun Prairie to Peruwelz | 4,121.05 mi (6,632.18 km) |
| Sun Prairie to Perwez | 4,162.48 mi (6,698.87 km) |
| Sun Prairie to Philippeville | 4,168.72 mi (6,708.90 km) |
