| Karlovo to Ridgeland (Mississippi) | 5,816.86 mi (9,361.34 km) |
| Karlovo to Ridgewood (New Jersey) | 4,768.25 mi (7,673.75 km) |
| Karlovo to Rifle (Colorado) | 6,030.73 mi (9,705.52 km) |
| Karlovo to Rincon (Georgia) | 5,461.22 mi (8,788.98 km) |
| Karlovo to Ringwood (New Jersey) | 4,769.43 mi (7,675.65 km) |
| Karlovo to Río Grande (Puerto Rico) | 5,398.13 mi (8,687.44 km) |
| Karlovo to Rio Grande City (Texas) | 6,471.69 mi (10,415.18 km) |
| Karlovo to Rio Linda (California) | 6,432.09 mi (10,351.44 km) |
| Karlovo to Rio Rancho (New Mexico) | 6,244.37 mi (10,049.34 km) |
| Karlovo to Rio Rico (Arizona) | 6,597.87 mi (10,618.24 km) |
| Karlovo to Ripon (California) | 6,484.72 mi (10,436.16 km) |
| Karlovo to River Edge (New Jersey) | 4,767.64 mi (7,672.77 km) |
| Karlovo to River Falls (Wisconsin) | 5,268.51 mi (8,478.84 km) |
| Karlovo to River Forest (Illinois) | 5,251.93 mi (8,452.17 km) |
| Karlovo to River Grove (Illinois) | 5,251.15 mi (8,450.91 km) |
