| Comacchio to Orangevale (California) | 5,986.93 mi (9,635.02 km) |
| Comacchio to Orchards (Washington) | 5,606.40 mi (9,022.64 km) |
| Comacchio to Orcutt (California) | 6,189.30 mi (9,960.72 km) |
| Comacchio to Oregon (Ohio) | 4,522.04 mi (7,277.52 km) |
| Comacchio to Oregon (Wisconsin) | 4,698.24 mi (7,561.09 km) |
| Comacchio to Oregon City (Oregon) | 5,628.56 mi (9,058.29 km) |
| Comacchio to Orem (Utah) | 5,611.51 mi (9,030.86 km) |
| Comacchio to Orinda (California) | 6,061.46 mi (9,754.98 km) |
| Comacchio to Orland Park (Illinois) | 4,699.36 mi (7,562.89 km) |
| Comacchio to Orlando (Florida) | 5,024.55 mi (8,086.22 km) |
| Comacchio to Ormond Beach (Florida) | 4,976.06 mi (8,008.19 km) |
| Comacchio to Oro Valley (Arizona) | 6,024.65 mi (9,695.74 km) |
| Comacchio to Oroville (California) | 5,948.36 mi (9,572.95 km) |
| Comacchio to Oshkosh (Wisconsin) | 4,617.22 mi (7,430.70 km) |
| Comacchio to Oskaloosa (Iowa) | 4,897.40 mi (7,881.60 km) |
