| Diamond Bar to Ratingen | 5,656.08 mi (9,102.59 km) |
| Diamond Bar to Ratzeburg | 5,643.61 mi (9,082.52 km) |
| Diamond Bar to Raubling | 5,993.76 mi (9,646.02 km) |
| Diamond Bar to Rauenberg | 5,814.71 mi (9,357.87 km) |
| Diamond Bar to Raunheim | 5,768.74 mi (9,283.88 km) |
| Diamond Bar to Ravensburg | 5,918.94 mi (9,525.62 km) |
| Diamond Bar to Recke | 5,627.69 mi (9,056.89 km) |
| Diamond Bar to Recklinghausen | 5,651.02 mi (9,094.44 km) |
| Diamond Bar to Regen | 5,960.51 mi (9,592.51 km) |
| Diamond Bar to Regensburg | 5,927.72 mi (9,539.74 km) |
| Diamond Bar to Regenstauf | 5,923.32 mi (9,532.67 km) |
| Diamond Bar to Rehau | 5,860.23 mi (9,431.13 km) |
| Diamond Bar to Rehburg-Loccum | 5,665.95 mi (9,118.47 km) |
| Diamond Bar to Rehlingen-Siersburg | 5,747.67 mi (9,249.98 km) |
| Diamond Bar to Reichelsheim | 5,795.84 mi (9,327.50 km) |
