| Allentown to Roy (Utah) | 1,896.67 mi (3,052.39 km) |
| Allentown to Royal Kunia (Hawaii) | 4,890.93 mi (7,871.19 km) |
| Allentown to Royal Oak (Michigan) | 418.24 mi (673.09 km) |
| Allentown to Royal Palm Beach (Florida) | 997.53 mi (1,605.37 km) |
| Allentown to Royse City (Texas) | 1,263.61 mi (2,033.58 km) |
| Allentown to Ruskin (Florida) | 974.27 mi (1,567.93 km) |
| Allentown to Russellville (Alabama) | 791.05 mi (1,273.07 km) |
| Allentown to Russellville (Arkansas) | 1,028.04 mi (1,654.46 km) |
| Allentown to Ruston (Louisiana) | 1,100.42 mi (1,770.96 km) |
| Allentown to Rutherford (New Jersey) | 73.40 mi (118.13 km) |
| Allentown to Rutland (Vermont) | 244.37 mi (393.27 km) |
| Allentown to Sabana Grande (Puerto Rico) | 1,635.72 mi (2,632.44 km) |
| Allentown to Sachse (Texas) | 1,276.81 mi (2,054.83 km) |
| Allentown to Saco (Maine) | 327.71 mi (527.40 km) |
| Allentown to Sacramento (California) | 2,425.18 mi (3,902.95 km) |
