| Allentown to River Ridge (Louisiana) | 1,107.04 mi (1,781.61 km) |
| Allentown to Riverbank (California) | 2,416.83 mi (3,889.51 km) |
| Allentown to Riverdale (Georgia) | 691.11 mi (1,112.23 km) |
| Allentown to Riverdale (Illinois) | 636.57 mi (1,024.46 km) |
| Allentown to Riverside (California) | 2,327.83 mi (3,746.27 km) |
| Allentown to Riverside (Ohio) | 459.61 mi (739.67 km) |
| Allentown to Riverton (Utah) | 1,901.44 mi (3,060.08 km) |
| Allentown to Riverton (Wyoming) | 1,693.54 mi (2,725.49 km) |
| Allentown to Riverview (Florida) | 964.10 mi (1,551.58 km) |
| Allentown to Riverview (Michigan) | 414.54 mi (667.14 km) |
| Allentown to Riviera Beach (Florida) | 990.04 mi (1,593.31 km) |
| Allentown to Riviera Beach (Maryland) | 113.64 mi (182.88 km) |
| Allentown to Roanoke (Virginia) | 332.44 mi (535.02 km) |
| Allentown to Roanoke Rapids (North Carolina) | 309.90 mi (498.74 km) |
| Allentown to Robbinsdale (Minnesota) | 953.12 mi (1,533.90 km) |
