| Parker to Orangeburg (South Carolina) | 1,386.57 mi (2,231.48 km) |
| Parker to Orangevale (California) | 882.42 mi (1,420.12 km) |
| Parker to Orchards (Washington) | 996.02 mi (1,602.93 km) |
| Parker to Orcutt (California) | 917.45 mi (1,476.49 km) |
| Parker to Oregon (Ohio) | 1,126.81 mi (1,813.43 km) |
| Parker to Oregon (Wisconsin) | 832.41 mi (1,339.63 km) |
| Parker to Oregon City (Oregon) | 991.29 mi (1,595.33 km) |
| Parker to Orem (Utah) | 370.94 mi (596.96 km) |
| Parker to Orinda (California) | 943.74 mi (1,518.80 km) |
| Parker to Orland Park (Illinois) | 898.10 mi (1,445.36 km) |
| Parker to Orlando (Florida) | 1,537.06 mi (2,473.66 km) |
| Parker to Ormond Beach (Florida) | 1,516.26 mi (2,440.18 km) |
| Parker to Oro Valley (Arizona) | 599.70 mi (965.13 km) |
| Parker to Oroville (California) | 893.69 mi (1,438.25 km) |
| Parker to Oshkosh (Wisconsin) | 890.03 mi (1,432.36 km) |
