| Chula Vista to Orbetello | 6,300.51 mi (10,139.69 km) |
| Chula Vista to Oria | 6,614.42 mi (10,644.88 km) |
| Chula Vista to Oristano | 6,338.09 mi (10,200.17 km) |
| Chula Vista to Orta Nova | 6,507.65 mi (10,473.05 km) |
| Chula Vista to Orte | 6,338.70 mi (10,201.15 km) |
| Chula Vista to Ortona | 6,410.48 mi (10,316.67 km) |
| Chula Vista to Orvieto | 6,316.03 mi (10,164.67 km) |
| Chula Vista to Orzinuovi | 6,105.70 mi (9,826.18 km) |
| Chula Vista to Osimo | 6,320.56 mi (10,171.96 km) |
| Chula Vista to Ospitaletto | 6,102.32 mi (9,820.74 km) |
| Chula Vista to Ostuni | 6,599.97 mi (10,621.63 km) |
| Chula Vista to Ottaviano | 6,493.30 mi (10,449.96 km) |
| Chula Vista to Ovada | 6,101.62 mi (9,819.60 km) |
| Chula Vista to Ozieri | 6,318.66 mi (10,168.90 km) |
| Chula Vista to Paceco | 6,579.05 mi (10,587.95 km) |
