| Park Ridge to Orangeburg (South Carolina) | 700.68 mi (1,127.63 km) |
| Park Ridge to Orangevale (California) | 1,761.17 mi (2,834.32 km) |
| Park Ridge to Orchards (Washington) | 1,733.04 mi (2,789.06 km) |
| Park Ridge to Orcutt (California) | 1,818.64 mi (2,926.83 km) |
| Park Ridge to Oregon (Ohio) | 228.44 mi (367.64 km) |
| Park Ridge to Oregon (Wisconsin) | 100.91 mi (162.39 km) |
| Park Ridge to Oregon City (Oregon) | 1,737.90 mi (2,796.88 km) |
| Park Ridge to Orem (Utah) | 1,242.62 mi (1,999.81 km) |
| Park Ridge to Orinda (California) | 1,828.49 mi (2,942.68 km) |
| Park Ridge to Orland Park (Illinois) | 28.00 mi (45.06 km) |
| Park Ridge to Orlando (Florida) | 1,003.88 mi (1,615.58 km) |
| Park Ridge to Ormond Beach (Florida) | 955.72 mi (1,538.08 km) |
| Park Ridge to Oro Valley (Arizona) | 1,428.59 mi (2,299.09 km) |
| Park Ridge to Oroville (California) | 1,761.88 mi (2,835.47 km) |
| Park Ridge to Oshkosh (Wisconsin) | 143.55 mi (231.02 km) |
