| Houghton le Spring to Montana | 1,355.95 mi (2,182.19 km) |
| Houghton le Spring to Nova Zagora | 1,501.36 mi (2,416.20 km) |
| Houghton le Spring to Novi Iskar | 1,390.12 mi (2,237.18 km) |
| Houghton le Spring to Novi Pazar | 1,504.76 mi (2,421.67 km) |
| Houghton le Spring to Omurtag | 1,487.24 mi (2,393.48 km) |
| Houghton le Spring to Panagyurishte | 1,434.63 mi (2,308.82 km) |
| Houghton le Spring to Parvomay | 1,491.41 mi (2,400.20 km) |
| Houghton le Spring to Pavlikeni | 1,440.13 mi (2,317.66 km) |
| Houghton le Spring to Pazardzhik | 1,454.79 mi (2,341.26 km) |
| Houghton le Spring to Pernik | 1,388.77 mi (2,235.01 km) |
| Houghton le Spring to Peshtera | 1,461.88 mi (2,352.67 km) |
| Houghton le Spring to Petrich | 1,455.74 mi (2,342.79 km) |
| Houghton le Spring to Pleven | 1,406.63 mi (2,263.75 km) |
| Houghton le Spring to Plovdiv | 1,472.17 mi (2,369.24 km) |
| Houghton le Spring to Pomorie | 1,556.77 mi (2,505.38 km) |
