| Pottstown to Popovo | 4,889.95 mi (7,869.62 km) |
| Pottstown to Provadia | 4,944.59 mi (7,957.54 km) |
| Pottstown to Radnevo | 4,922.39 mi (7,921.82 km) |
| Pottstown to Radomir | 4,790.54 mi (7,709.63 km) |
| Pottstown to Rakitovo | 4,860.40 mi (7,822.06 km) |
| Pottstown to Rakovski | 4,883.69 mi (7,859.53 km) |
| Pottstown to Razgrad | 4,893.43 mi (7,875.22 km) |
| Pottstown to Razlog | 4,839.18 mi (7,787.91 km) |
| Pottstown to Ruse | 4,858.93 mi (7,819.70 km) |
| Pottstown to Samokov | 4,824.11 mi (7,763.66 km) |
| Pottstown to Sandanski | 4,844.57 mi (7,796.59 km) |
| Pottstown to Sevlievo | 4,858.81 mi (7,819.49 km) |
| Pottstown to Shumen | 4,920.54 mi (7,918.85 km) |
| Pottstown to Silistra | 4,897.87 mi (7,882.36 km) |
| Pottstown to Sliven | 4,922.20 mi (7,921.51 km) |
