| Keystone to Montana | 5,625.02 mi (9,052.60 km) |
| Keystone to Nova Zagora | 5,778.40 mi (9,299.44 km) |
| Keystone to Novi Iskar | 5,652.18 mi (9,096.30 km) |
| Keystone to Novi Pazar | 5,796.25 mi (9,328.16 km) |
| Keystone to Omurtag | 5,772.72 mi (9,290.29 km) |
| Keystone to Panagyurishte | 5,699.13 mi (9,171.86 km) |
| Keystone to Parvomay | 5,758.56 mi (9,267.51 km) |
| Keystone to Pavlikeni | 5,720.91 mi (9,206.91 km) |
| Keystone to Pazardzhik | 5,716.53 mi (9,199.86 km) |
| Keystone to Pernik | 5,645.50 mi (9,085.55 km) |
| Keystone to Peshtera | 5,721.14 mi (9,207.28 km) |
| Keystone to Petrich | 5,696.02 mi (9,166.86 km) |
| Keystone to Pleven | 5,684.97 mi (9,149.08 km) |
| Keystone to Plovdiv | 5,736.47 mi (9,231.96 km) |
| Keystone to Pomorie | 5,843.69 mi (9,404.51 km) |
