| Allentown to Rosemont (California) | 2,419.80 mi (3,894.30 km) |
| Allentown to Rosemount (Minnesota) | 936.30 mi (1,506.83 km) |
| Allentown to Rosenberg (Texas) | 1,375.49 mi (2,213.63 km) |
| Allentown to Roseville (California) | 2,413.20 mi (3,883.67 km) |
| Allentown to Roseville (Michigan) | 407.60 mi (655.97 km) |
| Allentown to Roseville (Minnesota) | 944.44 mi (1,519.93 km) |
| Allentown to Rossmoor (California) | 2,367.95 mi (3,810.85 km) |
| Allentown to Rossville (Maryland) | 100.68 mi (162.03 km) |
| Allentown to Roswell (Georgia) | 665.00 mi (1,070.21 km) |
| Allentown to Roswell (New Mexico) | 1,670.61 mi (2,688.58 km) |
| Allentown to Round Lake (Illinois) | 664.29 mi (1,069.07 km) |
| Allentown to Round Lake Beach (Illinois) | 663.31 mi (1,067.49 km) |
| Allentown to Round Rock (Texas) | 1,422.18 mi (2,288.77 km) |
| Allentown to Rowland Heights (California) | 2,352.90 mi (3,786.63 km) |
| Allentown to Rowlett (Texas) | 1,277.29 mi (2,055.61 km) |
