| Zionsville to Olympia (Washington) | 1,877.70 mi (3,021.87 km) |
| Zionsville to Olympia Heights (Florida) | 1,044.29 mi (1,680.62 km) |
| Zionsville to Omaha (Nebraska) | 517.72 mi (833.19 km) |
| Zionsville to On Top of the World Designated Place (Florida) | 785.98 mi (1,264.91 km) |
| Zionsville to Onalaska (Wisconsin) | 368.24 mi (592.63 km) |
| Zionsville to Oneida (New York) | 590.44 mi (950.23 km) |
| Zionsville to Oneonta (New York) | 608.51 mi (979.30 km) |
| Zionsville to Ontario (California) | 1,764.70 mi (2,840.01 km) |
| Zionsville to Ontario (Oregon) | 1,588.98 mi (2,557.22 km) |
| Zionsville to Opa-locka (Florida) | 1,034.36 mi (1,664.64 km) |
| Zionsville to Opelika (Alabama) | 509.04 mi (819.23 km) |
| Zionsville to Opelousas (Louisiana) | 729.88 mi (1,174.64 km) |
| Zionsville to Orange (California) | 1,782.40 mi (2,868.49 km) |
| Zionsville to Orange (Texas) | 800.50 mi (1,288.29 km) |
| Zionsville to Orange City (Florida) | 815.41 mi (1,312.28 km) |
