| Castleton to Montana | 1,348.05 mi (2,169.47 km) |
| Castleton to Nova Zagora | 1,496.60 mi (2,408.55 km) |
| Castleton to Novi Iskar | 1,380.44 mi (2,221.61 km) |
| Castleton to Novi Pazar | 1,505.22 mi (2,422.42 km) |
| Castleton to Omurtag | 1,485.29 mi (2,390.34 km) |
| Castleton to Panagyurishte | 1,425.88 mi (2,294.73 km) |
| Castleton to Parvomay | 1,483.70 mi (2,387.78 km) |
| Castleton to Pavlikeni | 1,436.34 mi (2,311.57 km) |
| Castleton to Pazardzhik | 1,445.41 mi (2,326.17 km) |
| Castleton to Pernik | 1,377.68 mi (2,217.17 km) |
| Castleton to Peshtera | 1,451.90 mi (2,336.61 km) |
| Castleton to Petrich | 1,441.25 mi (2,319.47 km) |
| Castleton to Pleven | 1,401.88 mi (2,256.11 km) |
| Castleton to Plovdiv | 1,463.58 mi (2,355.40 km) |
| Castleton to Pomorie | 1,555.58 mi (2,503.46 km) |
