| Civita Castellana to Oakley (California) | 6,184.57 mi (9,953.10 km) |
| Civita Castellana to Oakton (Virginia) | 4,478.95 mi (7,208.17 km) |
| Civita Castellana to Oakville (Missouri) | 5,050.32 mi (8,127.71 km) |
| Civita Castellana to Oatfield (Oregon) | 5,773.77 mi (9,291.99 km) |
| Civita Castellana to Ocala (Florida) | 5,108.41 mi (8,221.19 km) |
| Civita Castellana to Ocean Acres (New Jersey) | 4,312.35 mi (6,940.05 km) |
| Civita Castellana to Ocean City (New Jersey) | 4,344.83 mi (6,992.32 km) |
| Civita Castellana to Ocean Pines (Maryland) | 4,403.46 mi (7,086.69 km) |
| Civita Castellana to Ocean Pointe (Hawaii) | 7,999.54 mi (12,874.01 km) |
| Civita Castellana to Ocean Springs (Mississippi) | 5,353.43 mi (8,615.52 km) |
| Civita Castellana to Oceanside (California) | 6,323.97 mi (10,177.44 km) |
| Civita Castellana to Oceanside (New York) | 4,250.21 mi (6,840.06 km) |
| Civita Castellana to Ocoee (Florida) | 5,106.21 mi (8,217.65 km) |
| Civita Castellana to Oconomowoc (Wisconsin) | 4,770.52 mi (7,677.41 km) |
| Civita Castellana to Odenton (Maryland) | 4,445.18 mi (7,153.82 km) |
