| Herndon to Romeoville (Illinois) | 593.24 mi (954.73 km) |
| Herndon to Romulus (Michigan) | 385.78 mi (620.85 km) |
| Herndon to Ronkonkoma (New York) | 259.01 mi (416.84 km) |
| Herndon to Roosevelt (New York) | 233.81 mi (376.27 km) |
| Herndon to Rosamond (California) | 2,254.22 mi (3,627.82 km) |
| Herndon to Rosaryville (Maryland) | 33.23 mi (53.47 km) |
| Herndon to Roscoe (Illinois) | 653.25 mi (1,051.30 km) |
| Herndon to Rose Hill (Virginia) | 19.58 mi (31.51 km) |
| Herndon to Roseburg (Oregon) | 2,381.08 mi (3,831.97 km) |
| Herndon to Rosedale (California) | 2,295.22 mi (3,693.81 km) |
| Herndon to Rosedale (Maryland) | 53.12 mi (85.50 km) |
| Herndon to Roselle (Illinois) | 599.07 mi (964.12 km) |
| Herndon to Roselle (New Jersey) | 202.61 mi (326.07 km) |
| Herndon to Roselle Park (New Jersey) | 202.81 mi (326.39 km) |
| Herndon to Rosemead (California) | 2,265.97 mi (3,646.73 km) |
