| South Portland to Rhondda | 3,051.11 mi (4,910.29 km) |
| South Portland to Rhosllanerchrugog | 3,038.39 mi (4,889.82 km) |
| South Portland to Rhyl | 3,015.52 mi (4,853.02 km) |
| South Portland to Rhymney | 3,053.70 mi (4,914.46 km) |
| South Portland to Richmond | 3,181.81 mi (5,120.64 km) |
| South Portland to Rickmansworth | 3,171.01 mi (5,103.25 km) |
| South Portland to Ripley | 3,103.16 mi (4,994.06 km) |
| South Portland to Ripon | 3,077.29 mi (4,952.43 km) |
| South Portland to Risca | 3,064.65 mi (4,932.08 km) |
| South Portland to Rochdale | 3,062.28 mi (4,928.26 km) |
| South Portland to Rochester | 3,216.23 mi (5,176.02 km) |
| South Portland to Rock Ferry | 3,033.32 mi (4,881.65 km) |
| South Portland to Rogerstone | 3,066.54 mi (4,935.12 km) |
| South Portland to Romford | 3,198.59 mi (5,147.64 km) |
| South Portland to Romsey | 3,143.42 mi (5,058.84 km) |
