| San Gregorio di Catania to Oakley (California) | 6,536.05 mi (10,518.76 km) |
| San Gregorio di Catania to Oakton (Virginia) | 4,774.37 mi (7,683.60 km) |
| San Gregorio di Catania to Oakville (Missouri) | 5,365.15 mi (8,634.37 km) |
| San Gregorio di Catania to Oatfield (Oregon) | 6,129.01 mi (9,863.68 km) |
| San Gregorio di Catania to Ocala (Florida) | 5,382.10 mi (8,661.65 km) |
| San Gregorio di Catania to Ocean Acres (New Jersey) | 4,605.65 mi (7,412.08 km) |
| San Gregorio di Catania to Ocean City (New Jersey) | 4,637.07 mi (7,462.64 km) |
| San Gregorio di Catania to Ocean Pines (Maryland) | 4,693.67 mi (7,553.73 km) |
| San Gregorio di Catania to Ocean Pointe (Hawaii) | 8,344.14 mi (13,428.59 km) |
| San Gregorio di Catania to Ocean Springs (Mississippi) | 5,644.98 mi (9,084.72 km) |
| San Gregorio di Catania to Oceanside (California) | 6,667.74 mi (10,730.69 km) |
| San Gregorio di Catania to Oceanside (New York) | 4,545.48 mi (7,315.24 km) |
| San Gregorio di Catania to Ocoee (Florida) | 5,376.55 mi (8,652.73 km) |
| San Gregorio di Catania to Oconomowoc (Wisconsin) | 5,093.38 mi (8,197.01 km) |
| San Gregorio di Catania to Odenton (Maryland) | 4,740.17 mi (7,628.57 km) |
