| Castel Volturno to Popovo | 649.47 mi (1,045.22 km) |
| Castel Volturno to Provadia | 707.42 mi (1,138.48 km) |
| Castel Volturno to Radnevo | 625.59 mi (1,006.80 km) |
| Castel Volturno to Radomir | 476.43 mi (766.74 km) |
| Castel Volturno to Rakitovo | 529.58 mi (852.28 km) |
| Castel Volturno to Rakovski | 576.21 mi (927.33 km) |
| Castel Volturno to Razgrad | 665.72 mi (1,071.37 km) |
| Castel Volturno to Razlog | 497.52 mi (800.69 km) |
| Castel Volturno to Ruse | 642.33 mi (1,033.72 km) |
| Castel Volturno to Samokov | 504.89 mi (812.54 km) |
| Castel Volturno to Sandanski | 487.15 mi (783.99 km) |
| Castel Volturno to Sevlievo | 590.06 mi (949.61 km) |
| Castel Volturno to Shumen | 683.45 mi (1,099.91 km) |
| Castel Volturno to Silistra | 710.21 mi (1,142.97 km) |
| Castel Volturno to Sliven | 648.15 mi (1,043.10 km) |
