| Philadelphia to Nasaud | 4,648.63 mi (7,481.25 km) |
| Philadelphia to Navodari | 4,933.30 mi (7,939.38 km) |
| Philadelphia to Negresti-Oas | 4,587.94 mi (7,383.57 km) |
| Philadelphia to Nehoiu | 4,800.18 mi (7,725.14 km) |
| Philadelphia to Ocna Mures | 4,662.89 mi (7,504.20 km) |
| Philadelphia to Odobesti | 4,812.52 mi (7,745.00 km) |
| Philadelphia to Odorheiu Secuiesc | 4,721.96 mi (7,599.26 km) |
| Philadelphia to Oltenita | 4,865.83 mi (7,830.80 km) |
| Philadelphia to Onesti | 4,780.71 mi (7,693.81 km) |
| Philadelphia to Oradea | 4,560.49 mi (7,339.41 km) |
| Philadelphia to Orastie | 4,658.34 mi (7,496.87 km) |
| Philadelphia to Oravita | 4,629.61 mi (7,450.64 km) |
| Philadelphia to Orsova | 4,670.61 mi (7,516.63 km) |
| Philadelphia to Otelu Rosu | 4,637.73 mi (7,463.70 km) |
| Philadelphia to Otopeni | 4,824.19 mi (7,763.78 km) |
