| Westerville to Odenton (Maryland) | 339.43 mi (546.26 km) |
| Westerville to Odessa (Texas) | 1,222.31 mi (1,967.12 km) |
| Westerville to Ogden (Utah) | 1,516.92 mi (2,441.25 km) |
| Westerville to Oildale (California) | 1,984.60 mi (3,193.91 km) |
| Westerville to Ojus (Florida) | 991.72 mi (1,596.02 km) |
| Westerville to Okemos (Michigan) | 194.41 mi (312.87 km) |
| Westerville to Oklahoma City (Oklahoma) | 857.90 mi (1,380.66 km) |
| Westerville to Okmulgee (Oklahoma) | 777.81 mi (1,251.76 km) |
| Westerville to Olathe (Kansas) | 639.62 mi (1,029.37 km) |
| Westerville to Old Jamestown (Missouri) | 402.47 mi (647.71 km) |
| Westerville to Oldsmar (Florida) | 834.32 mi (1,342.71 km) |
| Westerville to Olean (New York) | 269.98 mi (434.49 km) |
| Westerville to Olive Branch (Mississippi) | 520.47 mi (837.62 km) |
| Westerville to Olivehurst (California) | 2,041.76 mi (3,285.89 km) |
| Westerville to Olney (Maryland) | 318.43 mi (512.47 km) |
