| Rolla to Olympia (Washington) | 1,692.29 mi (2,723.48 km) |
| Rolla to Olympia Heights (Florida) | 1,076.34 mi (1,732.21 km) |
| Rolla to Omaha (Nebraska) | 323.53 mi (520.67 km) |
| Rolla to On Top of the World Designated Place (Florida) | 818.09 mi (1,316.59 km) |
| Rolla to Onalaska (Wisconsin) | 411.59 mi (662.39 km) |
| Rolla to Oneida (New York) | 915.04 mi (1,472.61 km) |
| Rolla to Oneonta (New York) | 932.56 mi (1,500.81 km) |
| Rolla to Ontario (California) | 1,464.92 mi (2,357.56 km) |
| Rolla to Ontario (Oregon) | 1,374.29 mi (2,211.70 km) |
| Rolla to Opa-locka (Florida) | 1,069.55 mi (1,721.27 km) |
| Rolla to Opelika (Alabama) | 512.47 mi (824.74 km) |
| Rolla to Opelousas (Louisiana) | 513.05 mi (825.67 km) |
| Rolla to Orange (California) | 1,481.77 mi (2,384.67 km) |
| Rolla to Orange (Texas) | 552.49 mi (889.15 km) |
| Rolla to Orange City (Florida) | 866.12 mi (1,393.89 km) |
