| Castel San Pietro Terme to Devnya | 799.85 mi (1,287.24 km) |
| Castel San Pietro Terme to Dimitrovgrad | 723.14 mi (1,163.79 km) |
| Castel San Pietro Terme to Dobrich | 808.59 mi (1,301.30 km) |
| Castel San Pietro Terme to Dospat | 662.61 mi (1,066.37 km) |
| Castel San Pietro Terme to Dupnitsa | 597.63 mi (961.80 km) |
| Castel San Pietro Terme to Elhovo | 768.11 mi (1,236.15 km) |
| Castel San Pietro Terme to Etropole | 629.82 mi (1,013.60 km) |
| Castel San Pietro Terme to Gabrovo | 694.86 mi (1,118.28 km) |
| Castel San Pietro Terme to Gorna Oryahovitsa | 708.89 mi (1,140.85 km) |
| Castel San Pietro Terme to Gotse Delchev | 643.85 mi (1,036.17 km) |
| Castel San Pietro Terme to Harmanli | 740.28 mi (1,191.37 km) |
| Castel San Pietro Terme to Haskovo | 724.01 mi (1,165.18 km) |
| Castel San Pietro Terme to Ihtiman | 628.08 mi (1,010.80 km) |
| Castel San Pietro Terme to Isperih | 757.57 mi (1,219.20 km) |
| Castel San Pietro Terme to Kardzhali | 720.69 mi (1,159.83 km) |
