| Mountain Ash to Rosemont (California) | 5,171.24 mi (8,322.30 km) |
| Mountain Ash to Rosemount (Minnesota) | 3,890.52 mi (6,261.18 km) |
| Mountain Ash to Rosenberg (Texas) | 4,743.98 mi (7,634.70 km) |
| Mountain Ash to Roseville (California) | 5,157.49 mi (8,300.18 km) |
| Mountain Ash to Roseville (Michigan) | 3,606.35 mi (5,803.87 km) |
| Mountain Ash to Roseville (Minnesota) | 3,881.37 mi (6,246.46 km) |
| Mountain Ash to Rossmoor (California) | 5,336.28 mi (8,587.91 km) |
| Mountain Ash to Rossville (Maryland) | 3,484.85 mi (5,608.33 km) |
| Mountain Ash to Roswell (Georgia) | 4,054.50 mi (6,525.09 km) |
| Mountain Ash to Roswell (New Mexico) | 4,880.96 mi (7,855.15 km) |
| Mountain Ash to Round Lake (Illinois) | 3,814.55 mi (6,138.93 km) |
| Mountain Ash to Round Lake Beach (Illinois) | 3,811.98 mi (6,134.79 km) |
| Mountain Ash to Round Rock (Texas) | 4,766.39 mi (7,670.77 km) |
| Mountain Ash to Rowland Heights (California) | 5,319.69 mi (8,561.22 km) |
| Mountain Ash to Rowlett (Texas) | 4,599.84 mi (7,402.73 km) |
