| Zionsville to Oskaloosa (Iowa) | 343.37 mi (552.60 km) |
| Zionsville to Oswego (Illinois) | 157.58 mi (253.60 km) |
| Zionsville to Oswego (New York) | 559.48 mi (900.40 km) |
| Zionsville to Otsego (Minnesota) | 519.87 mi (836.65 km) |
| Zionsville to Ottawa (Illinois) | 161.78 mi (260.36 km) |
| Zionsville to Ottawa (Kansas) | 487.64 mi (784.79 km) |
| Zionsville to Ottumwa (Iowa) | 328.21 mi (528.21 km) |
| Zionsville to Overland (Missouri) | 234.13 mi (376.80 km) |
| Zionsville to Overland Park (Kansas) | 452.84 mi (728.78 km) |
| Zionsville to Overlea (Maryland) | 522.71 mi (841.21 km) |
| Zionsville to Oviedo (Florida) | 835.48 mi (1,344.58 km) |
| Zionsville to Owasso (Oklahoma) | 576.34 mi (927.53 km) |
| Zionsville to Owatonna (Minnesota) | 453.75 mi (730.24 km) |
| Zionsville to Owensboro (Kentucky) | 160.10 mi (257.66 km) |
| Zionsville to Owings Mills (Maryland) | 507.78 mi (817.19 km) |
