| Diamond Bar to Radauti | 6,353.51 mi (10,224.99 km) |
| Diamond Bar to Ramnicu Sarat | 6,528.58 mi (10,506.73 km) |
| Diamond Bar to Ramnicu Valcea | 6,480.60 mi (10,429.52 km) |
| Diamond Bar to Rasnov | 6,477.92 mi (10,425.21 km) |
| Diamond Bar to Reghin | 6,389.19 mi (10,282.41 km) |
| Diamond Bar to Resita | 6,405.73 mi (10,309.03 km) |
| Diamond Bar to Roman | 6,431.58 mi (10,350.63 km) |
| Diamond Bar to Rosiori de Vede | 6,555.19 mi (10,549.56 km) |
| Diamond Bar to Rovinari | 6,461.38 mi (10,398.59 km) |
| Diamond Bar to Roznov | 6,427.78 mi (10,344.51 km) |
| Diamond Bar to Sabaoani | 6,424.51 mi (10,339.25 km) |
| Diamond Bar to Sacele | 6,482.29 mi (10,432.24 km) |
| Diamond Bar to Sacueni | 6,291.16 mi (10,124.65 km) |
| Diamond Bar to Salcea | 6,375.34 mi (10,260.12 km) |
| Diamond Bar to Salonta | 6,312.24 mi (10,158.56 km) |
