| Iselin to Popovo | 4,822.66 mi (7,761.33 km) |
| Iselin to Provadia | 4,877.52 mi (7,849.61 km) |
| Iselin to Radnevo | 4,854.59 mi (7,812.71 km) |
| Iselin to Radomir | 4,722.18 mi (7,599.62 km) |
| Iselin to Rakitovo | 4,792.07 mi (7,712.09 km) |
| Iselin to Rakovski | 4,815.67 mi (7,750.07 km) |
| Iselin to Razgrad | 4,826.29 mi (7,767.16 km) |
| Iselin to Razlog | 4,770.68 mi (7,677.66 km) |
| Iselin to Ruse | 4,791.78 mi (7,711.63 km) |
| Iselin to Samokov | 4,755.80 mi (7,653.72 km) |
| Iselin to Sandanski | 4,775.91 mi (7,686.08 km) |
| Iselin to Sevlievo | 4,791.12 mi (7,710.56 km) |
| Iselin to Shumen | 4,853.40 mi (7,810.79 km) |
| Iselin to Silistra | 4,831.16 mi (7,775.01 km) |
| Iselin to Sliven | 4,854.66 mi (7,812.81 km) |
