| Karlovo to Rockville (Maryland) | 4,975.86 mi (8,007.88 km) |
| Karlovo to Rockville Centre (New York) | 4,762.69 mi (7,664.81 km) |
| Karlovo to Rockwall (Texas) | 6,028.92 mi (9,702.60 km) |
| Karlovo to Rocky Mount (North Carolina) | 5,144.72 mi (8,279.62 km) |
| Karlovo to Rocky Point (New York) | 4,722.30 mi (7,599.80 km) |
| Karlovo to Rocky River (Ohio) | 5,051.12 mi (8,129.00 km) |
| Karlovo to Roessleville (New York) | 4,681.67 mi (7,534.43 km) |
| Karlovo to Rogers (Arkansas) | 5,765.21 mi (9,278.21 km) |
| Karlovo to Rogers (Minnesota) | 5,282.93 mi (8,502.06 km) |
| Karlovo to Rohnert Park (California) | 6,480.88 mi (10,429.97 km) |
| Karlovo to Rolla (Missouri) | 5,593.79 mi (9,002.34 km) |
| Karlovo to Rolling Meadows (Illinois) | 5,250.44 mi (8,449.77 km) |
| Karlovo to Roma (Texas) | 6,476.74 mi (10,423.31 km) |
| Karlovo to Rome (Georgia) | 5,527.78 mi (8,896.09 km) |
| Karlovo to Rome (New York) | 4,725.91 mi (7,605.61 km) |
