| Rockwall to Opwijk | 4,909.33 mi (7,900.81 km) |
| Rockwall to Ostend | 4,852.65 mi (7,809.59 km) |
| Rockwall to Oud-Heverlee | 4,932.21 mi (7,937.62 km) |
| Rockwall to Oud-Turnhout | 4,927.62 mi (7,930.23 km) |
| Rockwall to Oudenaarde | 4,891.05 mi (7,871.38 km) |
| Rockwall to Oudenburg | 4,857.12 mi (7,816.77 km) |
| Rockwall to Oupeye | 4,973.48 mi (8,004.04 km) |
| Rockwall to Overijse | 4,928.85 mi (7,932.21 km) |
| Rockwall to Overpelt | 4,947.31 mi (7,961.92 km) |
| Rockwall to Paal | 4,944.27 mi (7,957.03 km) |
| Rockwall to Peer | 4,951.59 mi (7,968.82 km) |
| Rockwall to Pepinster | 4,984.99 mi (8,022.57 km) |
| Rockwall to Peruwelz | 4,901.56 mi (7,888.29 km) |
| Rockwall to Perwez | 4,945.00 mi (7,958.21 km) |
| Rockwall to Philippeville | 4,949.42 mi (7,965.33 km) |
