| Thornton to Rockville (Maryland) | 3,545.68 mi (5,706.22 km) |
| Thornton to Rockville Centre (New York) | 3,334.09 mi (5,365.71 km) |
| Thornton to Rockwall (Texas) | 4,594.47 mi (7,394.08 km) |
| Thornton to Rocky Mount (North Carolina) | 3,720.48 mi (5,987.53 km) |
| Thornton to Rocky Point (New York) | 3,294.10 mi (5,301.34 km) |
| Thornton to Rocky River (Ohio) | 3,615.35 mi (5,818.34 km) |
| Thornton to Roessleville (New York) | 3,249.00 mi (5,228.76 km) |
| Thornton to Rogers (Arkansas) | 4,331.76 mi (6,971.30 km) |
| Thornton to Rogers (Minnesota) | 3,866.17 mi (6,222.00 km) |
| Thornton to Rohnert Park (California) | 5,164.64 mi (8,311.69 km) |
| Thornton to Rolla (Missouri) | 4,159.85 mi (6,694.64 km) |
| Thornton to Rolling Meadows (Illinois) | 3,817.75 mi (6,144.07 km) |
| Thornton to Roma (Texas) | 5,040.95 mi (8,112.63 km) |
| Thornton to Rome (Georgia) | 4,095.37 mi (6,590.86 km) |
| Thornton to Rome (New York) | 3,291.32 mi (5,296.86 km) |
