| Mattoon to Opwijk | 4,271.24 mi (6,873.90 km) |
| Mattoon to Ostend | 4,214.51 mi (6,782.60 km) |
| Mattoon to Oud-Heverlee | 4,294.13 mi (6,910.73 km) |
| Mattoon to Oud-Turnhout | 4,289.76 mi (6,903.70 km) |
| Mattoon to Oudenaarde | 4,252.87 mi (6,844.33 km) |
| Mattoon to Oudenburg | 4,218.97 mi (6,789.78 km) |
| Mattoon to Oupeye | 4,335.48 mi (6,977.28 km) |
| Mattoon to Overijse | 4,290.74 mi (6,905.28 km) |
| Mattoon to Overpelt | 4,309.47 mi (6,935.42 km) |
| Mattoon to Paal | 4,306.33 mi (6,930.36 km) |
| Mattoon to Peer | 4,313.73 mi (6,942.27 km) |
| Mattoon to Pepinster | 4,346.96 mi (6,995.76 km) |
| Mattoon to Peruwelz | 4,263.30 mi (6,861.12 km) |
| Mattoon to Perwez | 4,306.88 mi (6,931.25 km) |
| Mattoon to Philippeville | 4,311.17 mi (6,938.17 km) |
