| Philadelphia to Opwijk | 3,726.05 mi (5,996.50 km) |
| Philadelphia to Ostend | 3,668.43 mi (5,903.77 km) |
| Philadelphia to Oud-Heverlee | 3,749.03 mi (6,033.48 km) |
| Philadelphia to Oud-Turnhout | 3,749.45 mi (6,034.16 km) |
| Philadelphia to Oudenaarde | 3,705.28 mi (5,963.08 km) |
| Philadelphia to Oudenburg | 3,672.73 mi (5,910.68 km) |
| Philadelphia to Oupeye | 3,791.81 mi (6,102.33 km) |
| Philadelphia to Overijse | 3,744.90 mi (6,026.83 km) |
| Philadelphia to Overpelt | 3,769.42 mi (6,066.29 km) |
| Philadelphia to Paal | 3,764.19 mi (6,057.88 km) |
| Philadelphia to Peer | 3,773.07 mi (6,072.17 km) |
| Philadelphia to Pepinster | 3,802.58 mi (6,119.67 km) |
| Philadelphia to Peruwelz | 3,712.93 mi (5,975.39 km) |
| Philadelphia to Perwez | 3,760.43 mi (6,051.83 km) |
| Philadelphia to Philippeville | 3,760.62 mi (6,052.13 km) |
