| Frankfort to Popovo | 5,345.50 mi (8,602.75 km) |
| Frankfort to Provadia | 5,398.27 mi (8,687.67 km) |
| Frankfort to Radnevo | 5,381.94 mi (8,661.40 km) |
| Frankfort to Radomir | 5,254.91 mi (8,456.96 km) |
| Frankfort to Rakitovo | 5,324.48 mi (8,568.92 km) |
| Frankfort to Rakovski | 5,345.14 mi (8,602.18 km) |
| Frankfort to Razgrad | 5,347.80 mi (8,606.46 km) |
| Frankfort to Razlog | 5,304.70 mi (8,537.09 km) |
| Frankfort to Ruse | 5,313.46 mi (8,551.18 km) |
| Frankfort to Samokov | 5,288.05 mi (8,510.29 km) |
| Frankfort to Sandanski | 5,311.39 mi (8,547.86 km) |
| Frankfort to Sevlievo | 5,317.61 mi (8,557.87 km) |
| Frankfort to Shumen | 5,374.91 mi (8,650.08 km) |
| Frankfort to Silistra | 5,348.76 mi (8,608.00 km) |
| Frankfort to Sliven | 5,379.73 mi (8,657.84 km) |
