| Diamond Bar to Rosolini | 6,676.90 mi (10,745.44 km) |
| Diamond Bar to Rossano | 6,580.58 mi (10,590.42 km) |
| Diamond Bar to Rottofreno | 6,058.47 mi (9,750.17 km) |
| Diamond Bar to Rovato | 6,046.34 mi (9,730.64 km) |
| Diamond Bar to Roverbella | 6,086.36 mi (9,795.05 km) |
| Diamond Bar to Rovereto | 6,062.75 mi (9,757.05 km) |
| Diamond Bar to Rovigo | 6,128.39 mi (9,862.69 km) |
| Diamond Bar to Rozzano | 6,028.77 mi (9,702.37 km) |
| Diamond Bar to Rubano | 6,109.33 mi (9,832.01 km) |
| Diamond Bar to Rubiera | 6,119.33 mi (9,848.11 km) |
| Diamond Bar to Ruffano | 6,607.59 mi (10,633.88 km) |
| Diamond Bar to Russi | 6,173.38 mi (9,935.09 km) |
| Diamond Bar to Rutigliano | 6,512.85 mi (10,481.42 km) |
| Diamond Bar to Ruvo di Puglia | 6,489.77 mi (10,444.28 km) |
| Diamond Bar to Sabaudia | 6,369.86 mi (10,251.29 km) |
