| Williamstown to Nasaud | 4,657.90 mi (7,496.17 km) |
| Williamstown to Navodari | 4,942.31 mi (7,953.88 km) |
| Williamstown to Negresti-Oas | 4,597.25 mi (7,398.56 km) |
| Williamstown to Nehoiu | 4,809.12 mi (7,739.53 km) |
| Williamstown to Ocna Mures | 4,671.77 mi (7,518.49 km) |
| Williamstown to Odobesti | 4,821.72 mi (7,759.81 km) |
| Williamstown to Odorheiu Secuiesc | 4,731.05 mi (7,613.89 km) |
| Williamstown to Oltenita | 4,874.42 mi (7,844.61 km) |
| Williamstown to Onesti | 4,790.02 mi (7,708.79 km) |
| Williamstown to Oradea | 4,569.29 mi (7,353.57 km) |
| Williamstown to Orastie | 4,666.93 mi (7,510.69 km) |
| Williamstown to Oravita | 4,637.67 mi (7,463.60 km) |
| Williamstown to Orsova | 4,678.68 mi (7,529.61 km) |
| Williamstown to Otelu Rosu | 4,646.06 mi (7,477.11 km) |
| Williamstown to Otopeni | 4,832.82 mi (7,777.68 km) |
