| Karlovo to Reidsville (North Carolina) | 5,204.80 mi (8,376.31 km) |
| Karlovo to Reisterstown (Maryland) | 4,945.28 mi (7,958.65 km) |
| Karlovo to Rendon (Texas) | 6,076.16 mi (9,778.64 km) |
| Karlovo to Reno (Nevada) | 6,342.30 mi (10,206.94 km) |
| Karlovo to Renton (Washington) | 5,892.06 mi (9,482.36 km) |
| Karlovo to Republic (Missouri) | 5,696.23 mi (9,167.20 km) |
| Karlovo to Reston (Virginia) | 4,989.65 mi (8,030.07 km) |
| Karlovo to Revere (Massachusetts) | 4,580.75 mi (7,372.00 km) |
| Karlovo to Rexburg (Idaho) | 5,887.54 mi (9,475.08 km) |
| Karlovo to Reynoldsburg (Ohio) | 5,158.39 mi (8,301.62 km) |
| Karlovo to Rialto (California) | 6,619.70 mi (10,653.37 km) |
| Karlovo to Richardson (Texas) | 6,035.89 mi (9,713.82 km) |
| Karlovo to Richfield (Minnesota) | 5,289.30 mi (8,512.31 km) |
| Karlovo to Richfield (Wisconsin) | 5,200.71 mi (8,369.73 km) |
| Karlovo to Richland (Washington) | 5,910.02 mi (9,511.26 km) |
