| Hemel Hempstead to Romeoville (Illinois) | 3,956.10 mi (6,366.72 km) |
| Hemel Hempstead to Romulus (Michigan) | 3,747.28 mi (6,030.67 km) |
| Hemel Hempstead to Ronkonkoma (New York) | 3,402.13 mi (5,475.20 km) |
| Hemel Hempstead to Roosevelt (New York) | 3,426.23 mi (5,513.98 km) |
| Hemel Hempstead to Rosamond (California) | 5,370.80 mi (8,643.46 km) |
| Hemel Hempstead to Rosaryville (Maryland) | 3,643.17 mi (5,863.11 km) |
| Hemel Hempstead to Roscoe (Illinois) | 3,953.27 mi (6,362.17 km) |
| Hemel Hempstead to Rose Hill (Virginia) | 3,653.74 mi (5,880.12 km) |
| Hemel Hempstead to Roseburg (Oregon) | 5,041.53 mi (8,113.56 km) |
| Hemel Hempstead to Rosedale (California) | 5,372.06 mi (8,645.49 km) |
| Hemel Hempstead to Rosedale (Maryland) | 3,605.02 mi (5,801.72 km) |
| Hemel Hempstead to Roselle (Illinois) | 3,939.26 mi (6,339.63 km) |
| Hemel Hempstead to Roselle (New Jersey) | 3,454.93 mi (5,560.18 km) |
| Hemel Hempstead to Roselle Park (New Jersey) | 3,454.66 mi (5,559.74 km) |
| Hemel Hempstead to Rosemead (California) | 5,412.15 mi (8,710.01 km) |
