| Manassas to Rockville (Maryland) | 29.14 mi (46.90 km) |
| Manassas to Rockville Centre (New York) | 243.51 mi (391.89 km) |
| Manassas to Rockwall (Texas) | 1,132.92 mi (1,823.25 km) |
| Manassas to Rocky Mount (North Carolina) | 192.84 mi (310.35 km) |
| Manassas to Rocky Point (New York) | 284.63 mi (458.07 km) |
| Manassas to Rocky River (Ohio) | 297.71 mi (479.12 km) |
| Manassas to Roessleville (New York) | 334.18 mi (537.81 km) |
| Manassas to Rogers (Arkansas) | 927.28 mi (1,492.32 km) |
| Manassas to Rogers (Minnesota) | 936.51 mi (1,507.17 km) |
| Manassas to Rohnert Park (California) | 2,417.80 mi (3,891.07 km) |
| Manassas to Rolla (Missouri) | 774.83 mi (1,246.96 km) |
| Manassas to Rolling Meadows (Illinois) | 599.78 mi (965.26 km) |
| Manassas to Roma (Texas) | 1,508.98 mi (2,428.47 km) |
| Manassas to Rome (Georgia) | 527.76 mi (849.34 km) |
| Manassas to Rome (New York) | 326.37 mi (525.24 km) |
