| Allentown to Rockville (Maryland) | 137.34 mi (221.03 km) |
| Allentown to Rockville Centre (New York) | 96.46 mi (155.23 km) |
| Allentown to Rockwall (Texas) | 1,271.68 mi (2,046.57 km) |
| Allentown to Rocky Mount (North Carolina) | 343.73 mi (553.19 km) |
| Allentown to Rocky Point (New York) | 134.93 mi (217.14 km) |
| Allentown to Rocky River (Ohio) | 337.72 mi (543.50 km) |
| Allentown to Roessleville (New York) | 169.06 mi (272.08 km) |
| Allentown to Rogers (Arkansas) | 1,050.59 mi (1,690.77 km) |
| Allentown to Rogers (Minnesota) | 967.20 mi (1,556.56 km) |
| Allentown to Rohnert Park (California) | 2,493.00 mi (4,012.10 km) |
| Allentown to Rolla (Missouri) | 888.73 mi (1,430.28 km) |
| Allentown to Rolling Meadows (Illinois) | 658.41 mi (1,059.60 km) |
| Allentown to Roma (Texas) | 1,663.67 mi (2,677.41 km) |
| Allentown to Rome (Georgia) | 688.54 mi (1,108.10 km) |
| Allentown to Rome (New York) | 181.71 mi (292.43 km) |
