| Ercis to Opwijk | 2,053.85 mi (3,305.35 km) |
| Ercis to Ostend | 2,110.63 mi (3,396.73 km) |
| Ercis to Oud-Heverlee | 2,031.67 mi (3,269.66 km) |
| Ercis to Oud-Turnhout | 2,023.35 mi (3,256.27 km) |
| Ercis to Oudenaarde | 2,077.92 mi (3,344.09 km) |
| Ercis to Oudenburg | 2,106.79 mi (3,390.55 km) |
| Ercis to Oupeye | 1,988.19 mi (3,199.67 km) |
| Ercis to Overijse | 2,036.93 mi (3,278.12 km) |
| Ercis to Overpelt | 2,003.71 mi (3,224.67 km) |
| Ercis to Paal | 2,012.10 mi (3,238.16 km) |
| Ercis to Peer | 2,001.15 mi (3,220.54 km) |
| Ercis to Pepinster | 1,979.12 mi (3,185.09 km) |
| Ercis to Peruwelz | 2,075.75 mi (3,340.60 km) |
| Ercis to Perwez | 2,023.15 mi (3,255.95 km) |
| Ercis to Philippeville | 2,030.76 mi (3,268.20 km) |
