| Merrillville to Opwijk | 4,136.18 mi (6,656.55 km) |
| Merrillville to Ostend | 4,079.65 mi (6,565.56 km) |
| Merrillville to Oud-Heverlee | 4,159.03 mi (6,693.31 km) |
| Merrillville to Oud-Turnhout | 4,154.03 mi (6,685.26 km) |
| Merrillville to Oudenaarde | 4,118.16 mi (6,627.53 km) |
| Merrillville to Oudenburg | 4,084.13 mi (6,572.77 km) |
| Merrillville to Oupeye | 4,200.13 mi (6,759.46 km) |
| Merrillville to Overijse | 4,155.74 mi (6,688.02 km) |
| Merrillville to Overpelt | 4,173.68 mi (6,716.89 km) |
| Merrillville to Paal | 4,170.82 mi (6,712.28 km) |
| Merrillville to Peer | 4,178.01 mi (6,723.86 km) |
| Merrillville to Pepinster | 4,211.70 mi (6,778.07 km) |
| Merrillville to Peruwelz | 4,128.96 mi (6,644.92 km) |
| Merrillville to Perwez | 4,171.94 mi (6,714.09 km) |
| Merrillville to Philippeville | 4,176.80 mi (6,721.91 km) |
