| Troyan to Opwijk | 1,112.86 mi (1,790.98 km) |
| Troyan to Ostend | 1,170.45 mi (1,883.65 km) |
| Troyan to Oud-Heverlee | 1,089.88 mi (1,753.99 km) |
| Troyan to Oud-Turnhout | 1,090.60 mi (1,755.15 km) |
| Troyan to Oudenaarde | 1,133.56 mi (1,824.29 km) |
| Troyan to Oudenburg | 1,166.14 mi (1,876.72 km) |
| Troyan to Oupeye | 1,047.24 mi (1,685.37 km) |
| Troyan to Overijse | 1,093.96 mi (1,760.55 km) |
| Troyan to Overpelt | 1,070.69 mi (1,723.11 km) |
| Troyan to Paal | 1,075.23 mi (1,730.42 km) |
| Troyan to Peer | 1,066.80 mi (1,716.85 km) |
| Troyan to Pepinster | 1,036.35 mi (1,667.85 km) |
| Troyan to Peruwelz | 1,126.26 mi (1,812.54 km) |
| Troyan to Perwez | 1,078.40 mi (1,735.52 km) |
| Troyan to Philippeville | 1,078.74 mi (1,736.06 km) |
