| Rock Island to Odenton (Maryland) | 749.93 mi (1,206.89 km) |
| Rock Island to Odessa (Texas) | 927.73 mi (1,493.04 km) |
| Rock Island to Ogden (Utah) | 1,106.52 mi (1,780.78 km) |
| Rock Island to Oildale (California) | 1,586.93 mi (2,553.92 km) |
| Rock Island to Ojus (Florida) | 1,225.68 mi (1,972.54 km) |
| Rock Island to Okemos (Michigan) | 327.56 mi (527.16 km) |
| Rock Island to Oklahoma City (Oklahoma) | 558.69 mi (899.12 km) |
| Rock Island to Okmulgee (Oklahoma) | 499.42 mi (803.74 km) |
| Rock Island to Olathe (Kansas) | 286.26 mi (460.68 km) |
| Rock Island to Old Jamestown (Missouri) | 182.43 mi (293.59 km) |
| Rock Island to Oldsmar (Florida) | 1,029.10 mi (1,656.18 km) |
| Rock Island to Olean (New York) | 626.98 mi (1,009.02 km) |
| Rock Island to Olive Branch (Mississippi) | 451.49 mi (726.60 km) |
| Rock Island to Olivehurst (California) | 1,632.35 mi (2,627.02 km) |
| Rock Island to Olney (Maryland) | 728.94 mi (1,173.12 km) |
