| Troy to Orangeburg (South Carolina) | 640.03 mi (1,030.04 km) |
| Troy to Orangevale (California) | 1,997.41 mi (3,214.53 km) |
| Troy to Orchards (Washington) | 1,944.93 mi (3,130.07 km) |
| Troy to Orcutt (California) | 2,060.73 mi (3,316.42 km) |
| Troy to Oregon (Ohio) | 65.86 mi (106.00 km) |
| Troy to Oregon (Wisconsin) | 317.57 mi (511.08 km) |
| Troy to Oregon City (Oregon) | 1,951.36 mi (3,140.41 km) |
| Troy to Orem (Utah) | 1,480.28 mi (2,382.28 km) |
| Troy to Orinda (California) | 2,065.80 mi (3,324.58 km) |
| Troy to Orland Park (Illinois) | 250.95 mi (403.87 km) |
| Troy to Orlando (Florida) | 979.74 mi (1,576.75 km) |
| Troy to Ormond Beach (Florida) | 924.80 mi (1,488.31 km) |
| Troy to Oro Valley (Arizona) | 1,669.15 mi (2,686.24 km) |
| Troy to Oroville (California) | 1,996.11 mi (3,212.43 km) |
| Troy to Oshkosh (Wisconsin) | 289.90 mi (466.55 km) |
