| Pasadena to Orbetello | 5,609.35 mi (9,027.38 km) |
| Pasadena to Oria | 5,959.04 mi (9,590.14 km) |
| Pasadena to Oristano | 5,585.91 mi (8,989.65 km) |
| Pasadena to Orta Nova | 5,844.11 mi (9,405.19 km) |
| Pasadena to Orte | 5,658.85 mi (9,107.04 km) |
| Pasadena to Ortona | 5,748.46 mi (9,251.26 km) |
| Pasadena to Orvieto | 5,637.37 mi (9,072.47 km) |
| Pasadena to Orzinuovi | 5,447.34 mi (8,766.65 km) |
| Pasadena to Osimo | 5,666.16 mi (9,118.80 km) |
| Pasadena to Ospitaletto | 5,447.58 mi (8,767.03 km) |
| Pasadena to Ostuni | 5,947.33 mi (9,571.30 km) |
| Pasadena to Ottaviano | 5,810.52 mi (9,351.12 km) |
| Pasadena to Ovada | 5,420.37 mi (8,723.24 km) |
| Pasadena to Ozieri | 5,580.08 mi (8,980.26 km) |
| Pasadena to Paceco | 5,836.64 mi (9,393.17 km) |
