| Civita Castellana to Orangevale (California) | 6,130.23 mi (9,865.65 km) |
| Civita Castellana to Orchards (Washington) | 5,755.92 mi (9,263.26 km) |
| Civita Castellana to Orcutt (California) | 6,328.67 mi (10,185.01 km) |
| Civita Castellana to Oregon (Ohio) | 4,628.09 mi (7,448.19 km) |
| Civita Castellana to Oregon (Wisconsin) | 4,813.15 mi (7,746.01 km) |
| Civita Castellana to Oregon City (Oregon) | 5,777.89 mi (9,298.61 km) |
| Civita Castellana to Orem (Utah) | 5,746.62 mi (9,248.30 km) |
| Civita Castellana to Orinda (California) | 6,205.09 mi (9,986.12 km) |
| Civita Castellana to Orland Park (Illinois) | 4,810.29 mi (7,741.42 km) |
| Civita Castellana to Orlando (Florida) | 5,101.58 mi (8,210.20 km) |
| Civita Castellana to Ormond Beach (Florida) | 5,054.40 mi (8,134.27 km) |
| Civita Castellana to Oro Valley (Arizona) | 6,150.28 mi (9,897.92 km) |
| Civita Castellana to Oroville (California) | 6,092.62 mi (9,805.12 km) |
| Civita Castellana to Oshkosh (Wisconsin) | 4,733.15 mi (7,617.27 km) |
| Civita Castellana to Oskaloosa (Iowa) | 5,013.13 mi (8,067.86 km) |
