| Manassas to Romeoville (Illinois) | 594.20 mi (956.28 km) |
| Manassas to Romulus (Michigan) | 391.27 mi (629.69 km) |
| Manassas to Ronkonkoma (New York) | 271.54 mi (436.99 km) |
| Manassas to Roosevelt (New York) | 246.51 mi (396.71 km) |
| Manassas to Rosamond (California) | 2,250.60 mi (3,622.00 km) |
| Manassas to Rosaryville (Maryland) | 35.43 mi (57.03 km) |
| Manassas to Roscoe (Illinois) | 655.22 mi (1,054.48 km) |
| Manassas to Rose Hill (Virginia) | 20.40 mi (32.83 km) |
| Manassas to Roseburg (Oregon) | 2,382.08 mi (3,833.58 km) |
| Manassas to Rosedale (California) | 2,291.99 mi (3,688.60 km) |
| Manassas to Rosedale (Maryland) | 65.87 mi (106.01 km) |
| Manassas to Roselle (Illinois) | 600.67 mi (966.68 km) |
| Manassas to Roselle (New Jersey) | 216.06 mi (347.71 km) |
| Manassas to Roselle Park (New Jersey) | 216.30 mi (348.10 km) |
| Manassas to Rosemead (California) | 2,261.95 mi (3,640.25 km) |
