| Bucharest to Opwijk | 1,109.37 mi (1,785.36 km) |
| Bucharest to Ostend | 1,166.98 mi (1,878.07 km) |
| Bucharest to Oud-Heverlee | 1,086.60 mi (1,748.72 km) |
| Bucharest to Oud-Turnhout | 1,083.04 mi (1,742.99 km) |
| Bucharest to Oudenaarde | 1,131.86 mi (1,821.55 km) |
| Bucharest to Oudenburg | 1,162.86 mi (1,871.44 km) |
| Bucharest to Oupeye | 1,043.22 mi (1,678.90 km) |
| Bucharest to Overijse | 1,091.29 mi (1,756.27 km) |
| Bucharest to Overpelt | 1,063.09 mi (1,710.88 km) |
| Bucharest to Paal | 1,069.47 mi (1,721.15 km) |
| Bucharest to Peer | 1,059.78 mi (1,705.56 km) |
| Bucharest to Pepinster | 1,033.15 mi (1,662.69 km) |
| Bucharest to Peruwelz | 1,127.11 mi (1,813.90 km) |
| Bucharest to Perwez | 1,076.51 mi (1,732.48 km) |
| Bucharest to Philippeville | 1,080.62 mi (1,739.08 km) |
