| Idstein to Ridgeland (Mississippi) | 4,874.67 mi (7,845.02 km) |
| Idstein to Ridgewood (New Jersey) | 3,827.01 mi (6,158.98 km) |
| Idstein to Rifle (Colorado) | 5,125.70 mi (8,249.02 km) |
| Idstein to Rincon (Georgia) | 4,523.29 mi (7,279.53 km) |
| Idstein to Ringwood (New Jersey) | 3,828.05 mi (6,160.65 km) |
| Idstein to Río Grande (Puerto Rico) | 4,552.40 mi (7,326.38 km) |
| Idstein to Rio Grande City (Texas) | 5,530.17 mi (8,899.95 km) |
| Idstein to Rio Linda (California) | 5,577.26 mi (8,975.72 km) |
| Idstein to Rio Rancho (New Mexico) | 5,326.25 mi (8,571.77 km) |
| Idstein to Rio Rico (Arizona) | 5,683.07 mi (9,146.02 km) |
| Idstein to Ripon (California) | 5,625.45 mi (9,053.29 km) |
| Idstein to River Edge (New Jersey) | 3,826.47 mi (6,158.11 km) |
| Idstein to River Falls (Wisconsin) | 4,342.39 mi (6,988.41 km) |
| Idstein to River Forest (Illinois) | 4,314.39 mi (6,943.35 km) |
| Idstein to River Grove (Illinois) | 4,313.67 mi (6,942.18 km) |
