| Ludwigsburg to Ridgeland (Mississippi) | 4,954.11 mi (7,972.87 km) |
| Ludwigsburg to Ridgewood (New Jersey) | 3,903.26 mi (6,281.68 km) |
| Ludwigsburg to Rifle (Colorado) | 5,219.03 mi (8,399.21 km) |
| Ludwigsburg to Rincon (Georgia) | 4,596.00 mi (7,396.56 km) |
| Ludwigsburg to Ringwood (New Jersey) | 3,904.53 mi (6,283.73 km) |
| Ludwigsburg to Río Grande (Puerto Rico) | 4,594.77 mi (7,394.57 km) |
| Ludwigsburg to Rio Grande City (Texas) | 5,611.55 mi (9,030.91 km) |
| Ludwigsburg to Rio Linda (California) | 5,674.98 mi (9,133.01 km) |
| Ludwigsburg to Rio Rancho (New Mexico) | 5,417.29 mi (8,718.29 km) |
| Ludwigsburg to Rio Rico (Arizona) | 5,774.63 mi (9,293.36 km) |
| Ludwigsburg to Ripon (California) | 5,722.90 mi (9,210.12 km) |
| Ludwigsburg to River Edge (New Jersey) | 3,902.60 mi (6,280.64 km) |
| Ludwigsburg to River Falls (Wisconsin) | 4,431.93 mi (7,132.51 km) |
| Ludwigsburg to River Forest (Illinois) | 4,399.57 mi (7,080.42 km) |
| Ludwigsburg to River Grove (Illinois) | 4,398.87 mi (7,079.30 km) |
