| Mortara to Orangevale (California) | 5,858.02 mi (9,427.56 km) |
| Mortara to Orchards (Washington) | 5,486.93 mi (8,830.37 km) |
| Mortara to Orcutt (California) | 6,055.40 mi (9,745.22 km) |
| Mortara to Oregon (Ohio) | 4,361.86 mi (7,019.74 km) |
| Mortara to Oregon (Wisconsin) | 4,543.04 mi (7,311.32 km) |
| Mortara to Oregon City (Oregon) | 5,508.77 mi (8,865.51 km) |
| Mortara to Orem (Utah) | 5,472.87 mi (8,807.74 km) |
| Mortara to Orinda (California) | 5,932.98 mi (9,548.21 km) |
| Mortara to Orland Park (Illinois) | 4,541.80 mi (7,309.32 km) |
| Mortara to Orlando (Florida) | 4,854.78 mi (7,813.02 km) |
| Mortara to Ormond Beach (Florida) | 4,806.54 mi (7,735.38 km) |
| Mortara to Oro Valley (Arizona) | 5,877.24 mi (9,458.50 km) |
| Mortara to Oroville (California) | 5,820.76 mi (9,367.61 km) |
| Mortara to Oshkosh (Wisconsin) | 4,462.66 mi (7,181.96 km) |
| Mortara to Oskaloosa (Iowa) | 4,742.75 mi (7,632.71 km) |
