| Westerville to Orangeburg (South Carolina) | 472.01 mi (759.63 km) |
| Westerville to Orangevale (California) | 2,031.22 mi (3,268.93 km) |
| Westerville to Orchards (Washington) | 2,019.73 mi (3,250.44 km) |
| Westerville to Orcutt (California) | 2,071.84 mi (3,334.31 km) |
| Westerville to Oregon (Ohio) | 108.92 mi (175.29 km) |
| Westerville to Oregon (Wisconsin) | 386.37 mi (621.80 km) |
| Westerville to Oregon City (Oregon) | 2,024.26 mi (3,257.74 km) |
| Westerville to Orem (Utah) | 1,511.78 mi (2,432.98 km) |
| Westerville to Orinda (California) | 2,096.48 mi (3,373.95 km) |
| Westerville to Orland Park (Illinois) | 277.72 mi (446.94 km) |
| Westerville to Orlando (Florida) | 809.74 mi (1,303.15 km) |
| Westerville to Ormond Beach (Florida) | 755.03 mi (1,215.10 km) |
| Westerville to Oro Valley (Arizona) | 1,642.78 mi (2,643.79 km) |
| Westerville to Oroville (California) | 2,035.00 mi (3,275.02 km) |
| Westerville to Oshkosh (Wisconsin) | 395.11 mi (635.87 km) |
