| Mountain Ash to Romeoville (Illinois) | 3,846.86 mi (6,190.92 km) |
| Mountain Ash to Romulus (Michigan) | 3,635.73 mi (5,851.14 km) |
| Mountain Ash to Ronkonkoma (New York) | 3,284.15 mi (5,285.33 km) |
| Mountain Ash to Roosevelt (New York) | 3,308.36 mi (5,324.29 km) |
| Mountain Ash to Rosamond (California) | 5,280.02 mi (8,497.37 km) |
| Mountain Ash to Rosaryville (Maryland) | 3,525.41 mi (5,673.59 km) |
| Mountain Ash to Roscoe (Illinois) | 3,845.36 mi (6,188.51 km) |
| Mountain Ash to Rose Hill (Virginia) | 3,536.12 mi (5,690.83 km) |
| Mountain Ash to Roseburg (Oregon) | 4,964.01 mi (7,988.80 km) |
| Mountain Ash to Rosedale (California) | 5,282.76 mi (8,501.79 km) |
| Mountain Ash to Rosedale (Maryland) | 3,487.51 mi (5,612.60 km) |
| Mountain Ash to Roselle (Illinois) | 3,830.34 mi (6,164.34 km) |
| Mountain Ash to Roselle (New Jersey) | 3,337.35 mi (5,370.95 km) |
| Mountain Ash to Roselle Park (New Jersey) | 3,337.09 mi (5,370.52 km) |
| Mountain Ash to Rosemead (California) | 5,320.54 mi (8,562.58 km) |
