| Rio Grande City to Ratingen | 5,439.57 mi (8,754.14 km) |
| Rio Grande City to Ratzeburg | 5,500.14 mi (8,851.63 km) |
| Rio Grande City to Raubling | 5,765.62 mi (9,278.87 km) |
| Rio Grande City to Rauenberg | 5,579.56 mi (8,979.43 km) |
| Rio Grande City to Raunheim | 5,543.92 mi (8,922.07 km) |
| Rio Grande City to Ravensburg | 5,667.38 mi (9,120.77 km) |
| Rio Grande City to Recke | 5,436.70 mi (8,749.52 km) |
| Rio Grande City to Recklinghausen | 5,441.98 mi (8,758.01 km) |
| Rio Grande City to Regen | 5,760.99 mi (9,271.41 km) |
| Rio Grande City to Regensburg | 5,719.12 mi (9,204.04 km) |
| Rio Grande City to Regenstauf | 5,716.87 mi (9,200.42 km) |
| Rio Grande City to Rehau | 5,670.96 mi (9,126.53 km) |
| Rio Grande City to Rehburg-Loccum | 5,488.63 mi (8,833.09 km) |
| Rio Grande City to Rehlingen-Siersburg | 5,496.64 mi (8,845.99 km) |
| Rio Grande City to Reichelsheim | 5,569.36 mi (8,963.02 km) |
