| Apex to Orangevale (California) | 2,318.67 mi (3,731.54 km) |
| Apex to Orchards (Washington) | 2,355.79 mi (3,791.27 km) |
| Apex to Orcutt (California) | 2,325.95 mi (3,743.26 km) |
| Apex to Oregon (Ohio) | 477.55 mi (768.54 km) |
| Apex to Oregon (Wisconsin) | 749.55 mi (1,206.29 km) |
| Apex to Oregon City (Oregon) | 2,358.36 mi (3,795.42 km) |
| Apex to Orem (Utah) | 1,804.04 mi (2,903.32 km) |
| Apex to Orinda (California) | 2,378.88 mi (3,828.44 km) |
| Apex to Orland Park (Illinois) | 632.12 mi (1,017.29 km) |
| Apex to Orlando (Florida) | 520.95 mi (838.40 km) |
| Apex to Ormond Beach (Florida) | 462.47 mi (744.28 km) |
| Apex to Oro Valley (Arizona) | 1,843.17 mi (2,966.29 km) |
| Apex to Oroville (California) | 2,329.19 mi (3,748.46 km) |
| Apex to Oshkosh (Wisconsin) | 768.76 mi (1,237.20 km) |
| Apex to Oskaloosa (Iowa) | 836.48 mi (1,346.18 km) |
