| Duncan to Rhondda | 4,570.79 mi (7,355.98 km) |
| Duncan to Rhosllanerchrugog | 4,542.46 mi (7,310.39 km) |
| Duncan to Rhyl | 4,517.22 mi (7,269.76 km) |
| Duncan to Rhymney | 4,571.61 mi (7,357.29 km) |
| Duncan to Richmond | 4,694.97 mi (7,555.83 km) |
| Duncan to Rickmansworth | 4,682.78 mi (7,536.21 km) |
| Duncan to Ripley | 4,602.51 mi (7,407.02 km) |
| Duncan to Ripon | 4,564.48 mi (7,345.83 km) |
| Duncan to Risca | 4,583.60 mi (7,376.59 km) |
| Duncan to Rochdale | 4,557.27 mi (7,334.22 km) |
| Duncan to Rochester | 4,727.97 mi (7,608.93 km) |
| Duncan to Rock Ferry | 4,533.23 mi (7,295.54 km) |
| Duncan to Rogerstone | 4,585.57 mi (7,379.76 km) |
| Duncan to Romford | 4,709.20 mi (7,578.73 km) |
| Duncan to Romsey | 4,664.39 mi (7,506.60 km) |
