| Most to Orangevale (California) | 5,693.64 mi (9,163.02 km) |
| Most to Orchards (Washington) | 5,292.90 mi (8,518.10 km) |
| Most to Orcutt (California) | 5,908.22 mi (9,508.36 km) |
| Most to Oregon (Ohio) | 4,351.20 mi (7,002.58 km) |
| Most to Oregon (Wisconsin) | 4,500.04 mi (7,242.12 km) |
| Most to Oregon City (Oregon) | 5,315.65 mi (8,554.71 km) |
| Most to Orem (Utah) | 5,346.32 mi (8,604.06 km) |
| Most to Orinda (California) | 5,766.84 mi (9,280.84 km) |
| Most to Orland Park (Illinois) | 4,512.97 mi (7,262.92 km) |
| Most to Orlando (Florida) | 4,931.15 mi (7,935.93 km) |
| Most to Ormond Beach (Florida) | 4,879.50 mi (7,852.79 km) |
| Most to Oro Valley (Arizona) | 5,787.09 mi (9,313.43 km) |
| Most to Oroville (California) | 5,651.99 mi (9,096.00 km) |
| Most to Oshkosh (Wisconsin) | 4,416.47 mi (7,107.62 km) |
| Most to Oskaloosa (Iowa) | 4,695.50 mi (7,556.67 km) |
