| Catalca to Opwijk | 1,338.49 mi (2,154.10 km) |
| Catalca to Ostend | 1,396.13 mi (2,246.86 km) |
| Catalca to Oud-Heverlee | 1,315.52 mi (2,117.13 km) |
| Catalca to Oud-Turnhout | 1,315.43 mi (2,116.98 km) |
| Catalca to Oudenaarde | 1,359.49 mi (2,187.89 km) |
| Catalca to Oudenburg | 1,391.85 mi (2,239.97 km) |
| Catalca to Oupeye | 1,272.71 mi (2,048.23 km) |
| Catalca to Overijse | 1,319.70 mi (2,123.86 km) |
| Catalca to Overpelt | 1,295.49 mi (2,084.88 km) |
| Catalca to Paal | 1,300.41 mi (2,092.81 km) |
| Catalca to Peer | 1,291.72 mi (2,078.82 km) |
| Catalca to Pepinster | 1,261.95 mi (2,030.92 km) |
| Catalca to Peruwelz | 1,352.52 mi (2,176.67 km) |
| Catalca to Perwez | 1,304.25 mi (2,099.00 km) |
| Catalca to Philippeville | 1,305.08 mi (2,100.32 km) |
