| Plainfield to Orbetello | 4,227.44 mi (6,803.41 km) |
| Plainfield to Oria | 4,580.06 mi (7,370.90 km) |
| Plainfield to Oristano | 4,197.92 mi (6,755.89 km) |
| Plainfield to Orta Nova | 4,464.70 mi (7,185.24 km) |
| Plainfield to Orte | 4,278.25 mi (6,885.18 km) |
| Plainfield to Ortona | 4,370.00 mi (7,032.84 km) |
| Plainfield to Orvieto | 4,257.09 mi (6,851.13 km) |
| Plainfield to Orzinuovi | 4,072.07 mi (6,553.37 km) |
| Plainfield to Osimo | 4,289.67 mi (6,903.56 km) |
| Plainfield to Ospitaletto | 4,073.00 mi (6,554.85 km) |
| Plainfield to Ostuni | 4,568.87 mi (7,352.89 km) |
| Plainfield to Ottaviano | 4,428.52 mi (7,127.01 km) |
| Plainfield to Ovada | 4,041.27 mi (6,503.79 km) |
| Plainfield to Ozieri | 4,193.07 mi (6,748.09 km) |
| Plainfield to Paceco | 4,448.65 mi (7,159.41 km) |
