| Civita Castellana to Oswego (Illinois) | 4,826.01 mi (7,766.71 km) |
| Civita Castellana to Oswego (New York) | 4,267.79 mi (6,868.35 km) |
| Civita Castellana to Otsego (Minnesota) | 4,869.00 mi (7,835.90 km) |
| Civita Castellana to Ottawa (Illinois) | 4,859.93 mi (7,821.30 km) |
| Civita Castellana to Ottawa (Kansas) | 5,241.21 mi (8,434.91 km) |
| Civita Castellana to Ottumwa (Iowa) | 5,016.97 mi (8,074.04 km) |
| Civita Castellana to Overland (Missouri) | 5,041.04 mi (8,112.76 km) |
| Civita Castellana to Overland Park (Kansas) | 5,204.97 mi (8,376.58 km) |
| Civita Castellana to Overlea (Maryland) | 4,425.68 mi (7,122.45 km) |
| Civita Castellana to Oviedo (Florida) | 5,086.61 mi (8,186.11 km) |
| Civita Castellana to Owasso (Oklahoma) | 5,374.10 mi (8,648.78 km) |
| Civita Castellana to Owatonna (Minnesota) | 4,907.94 mi (7,898.57 km) |
| Civita Castellana to Owensboro (Kentucky) | 4,948.64 mi (7,964.06 km) |
| Civita Castellana to Owings Mills (Maryland) | 4,435.84 mi (7,138.79 km) |
| Civita Castellana to Owosso (Michigan) | 4,602.81 mi (7,407.51 km) |
