| Mountain Ash to Rockville (Maryland) | 3,524.86 mi (5,672.71 km) |
| Mountain Ash to Rockville Centre (New York) | 3,311.27 mi (5,328.97 km) |
| Mountain Ash to Rockwall (Texas) | 4,595.40 mi (7,395.59 km) |
| Mountain Ash to Rocky Mount (North Carolina) | 3,692.90 mi (5,943.14 km) |
| Mountain Ash to Rocky Point (New York) | 3,270.79 mi (5,263.83 km) |
| Mountain Ash to Rocky River (Ohio) | 3,609.18 mi (5,808.41 km) |
| Mountain Ash to Roessleville (New York) | 3,232.35 mi (5,201.97 km) |
| Mountain Ash to Rogers (Arkansas) | 4,335.41 mi (6,977.16 km) |
| Mountain Ash to Rogers (Minnesota) | 3,888.91 mi (6,258.60 km) |
| Mountain Ash to Rohnert Park (California) | 5,223.50 mi (8,406.40 km) |
| Mountain Ash to Rolla (Missouri) | 4,162.68 mi (6,699.18 km) |
| Mountain Ash to Rolling Meadows (Illinois) | 3,823.71 mi (6,153.67 km) |
| Mountain Ash to Roma (Texas) | 5,034.56 mi (8,102.33 km) |
| Mountain Ash to Rome (Georgia) | 4,077.75 mi (6,562.50 km) |
| Mountain Ash to Rome (New York) | 3,279.13 mi (5,277.25 km) |
