| Rock Springs to Opwijk | 4,892.96 mi (7,874.47 km) |
| Rock Springs to Ostend | 4,840.63 mi (7,790.24 km) |
| Rock Springs to Oud-Heverlee | 4,914.58 mi (7,909.25 km) |
| Rock Springs to Oud-Turnhout | 4,901.40 mi (7,888.05 km) |
| Rock Springs to Oudenaarde | 4,879.97 mi (7,853.55 km) |
| Rock Springs to Oudenburg | 4,845.19 mi (7,797.58 km) |
| Rock Springs to Oupeye | 4,951.25 mi (7,968.27 km) |
| Rock Springs to Overijse | 4,912.76 mi (7,906.32 km) |
| Rock Springs to Overpelt | 4,919.69 mi (7,917.47 km) |
| Rock Springs to Paal | 4,920.61 mi (7,918.96 km) |
| Rock Springs to Peer | 4,924.87 mi (7,925.81 km) |
| Rock Springs to Pepinster | 4,963.53 mi (7,988.03 km) |
| Rock Springs to Peruwelz | 4,895.17 mi (7,878.01 km) |
| Rock Springs to Perwez | 4,929.27 mi (7,932.89 km) |
| Rock Springs to Philippeville | 4,941.15 mi (7,952.01 km) |
