| Hemel Hempstead to Rockville (Maryland) | 3,642.25 mi (5,861.63 km) |
| Hemel Hempstead to Rockville Centre (New York) | 3,429.12 mi (5,518.64 km) |
| Hemel Hempstead to Rockwall (Texas) | 4,706.31 mi (7,574.08 km) |
| Hemel Hempstead to Rocky Mount (North Carolina) | 3,812.00 mi (6,134.83 km) |
| Hemel Hempstead to Rocky Point (New York) | 3,388.75 mi (5,453.67 km) |
| Hemel Hempstead to Rocky River (Ohio) | 3,722.27 mi (5,990.41 km) |
| Hemel Hempstead to Roessleville (New York) | 3,348.52 mi (5,388.92 km) |
| Hemel Hempstead to Rogers (Arkansas) | 4,445.27 mi (7,153.98 km) |
| Hemel Hempstead to Rogers (Minnesota) | 3,990.85 mi (6,422.65 km) |
| Hemel Hempstead to Rohnert Park (California) | 5,306.38 mi (8,539.79 km) |
| Hemel Hempstead to Rolla (Missouri) | 4,272.80 mi (6,876.41 km) |
| Hemel Hempstead to Rolling Meadows (Illinois) | 3,932.58 mi (6,328.88 km) |
| Hemel Hempstead to Roma (Texas) | 5,148.04 mi (8,284.97 km) |
| Hemel Hempstead to Rome (Georgia) | 4,194.41 mi (6,750.24 km) |
| Hemel Hempstead to Rome (New York) | 3,394.01 mi (5,462.13 km) |
