| Clayton to Montana | 1,339.22 mi (2,155.26 km) |
| Clayton to Nova Zagora | 1,487.21 mi (2,393.43 km) |
| Clayton to Novi Iskar | 1,371.98 mi (2,207.98 km) |
| Clayton to Novi Pazar | 1,494.84 mi (2,405.71 km) |
| Clayton to Omurtag | 1,475.36 mi (2,374.36 km) |
| Clayton to Panagyurishte | 1,417.24 mi (2,280.83 km) |
| Clayton to Parvomay | 1,474.88 mi (2,373.58 km) |
| Clayton to Pavlikeni | 1,426.74 mi (2,296.12 km) |
| Clayton to Pazardzhik | 1,436.91 mi (2,312.48 km) |
| Clayton to Pernik | 1,369.50 mi (2,203.99 km) |
| Clayton to Peshtera | 1,443.52 mi (2,323.12 km) |
| Clayton to Petrich | 1,433.78 mi (2,307.44 km) |
| Clayton to Pleven | 1,392.45 mi (2,240.94 km) |
| Clayton to Plovdiv | 1,454.92 mi (2,341.47 km) |
| Clayton to Pomorie | 1,545.52 mi (2,487.28 km) |
