| Plainview to Orbetello | 4,179.61 mi (6,726.44 km) |
| Plainview to Oria | 4,532.54 mi (7,294.42 km) |
| Plainview to Oristano | 4,149.11 mi (6,677.35 km) |
| Plainview to Orta Nova | 4,417.14 mi (7,108.70 km) |
| Plainview to Orte | 4,230.58 mi (6,808.46 km) |
| Plainview to Ortona | 4,322.57 mi (6,956.50 km) |
| Plainview to Orvieto | 4,209.46 mi (6,774.47 km) |
| Plainview to Orzinuovi | 4,025.02 mi (6,477.64 km) |
| Plainview to Osimo | 4,242.46 mi (6,827.57 km) |
| Plainview to Ospitaletto | 4,026.01 mi (6,479.24 km) |
| Plainview to Ostuni | 4,521.41 mi (7,276.51 km) |
| Plainview to Ottaviano | 4,380.66 mi (7,049.99 km) |
| Plainview to Ovada | 3,993.80 mi (6,427.40 km) |
| Plainview to Ozieri | 4,144.47 mi (6,669.89 km) |
| Plainview to Paceco | 4,399.84 mi (7,080.86 km) |
