| Johnston to Rockville (Maryland) | 888.86 mi (1,430.49 km) |
| Johnston to Rockville Centre (New York) | 1,044.55 mi (1,681.04 km) |
| Johnston to Rockwall (Texas) | 624.21 mi (1,004.58 km) |
| Johnston to Rocky Mount (North Carolina) | 941.74 mi (1,515.58 km) |
| Johnston to Rocky Point (New York) | 1,077.42 mi (1,733.94 km) |
| Johnston to Rocky River (Ohio) | 613.23 mi (986.90 km) |
| Johnston to Roessleville (New York) | 1,020.05 mi (1,641.61 km) |
| Johnston to Rogers (Arkansas) | 372.02 mi (598.71 km) |
| Johnston to Rogers (Minnesota) | 241.63 mi (388.86 km) |
| Johnston to Rohnert Park (California) | 1,542.93 mi (2,483.10 km) |
| Johnston to Rolla (Missouri) | 278.92 mi (448.87 km) |
| Johnston to Rolling Meadows (Illinois) | 294.26 mi (473.57 km) |
| Johnston to Roma (Texas) | 1,097.23 mi (1,765.83 km) |
| Johnston to Rome (Georgia) | 691.62 mi (1,113.06 km) |
| Johnston to Rome (New York) | 933.55 mi (1,502.40 km) |
