| South River to Montana | 4,706.60 mi (7,574.55 km) |
| South River to Nova Zagora | 4,857.80 mi (7,817.87 km) |
| South River to Novi Iskar | 4,736.38 mi (7,622.47 km) |
| South River to Novi Pazar | 4,869.22 mi (7,836.26 km) |
| South River to Omurtag | 4,848.49 mi (7,802.90 km) |
| South River to Panagyurishte | 4,782.80 mi (7,697.18 km) |
| South River to Parvomay | 4,841.66 mi (7,791.90 km) |
| South River to Pavlikeni | 4,798.51 mi (7,722.45 km) |
| South River to Pazardzhik | 4,801.29 mi (7,726.92 km) |
| South River to Pernik | 4,731.43 mi (7,614.51 km) |
| South River to Peshtera | 4,806.78 mi (7,735.77 km) |
| South River to Petrich | 4,787.59 mi (7,704.88 km) |
| South River to Pleven | 4,763.40 mi (7,665.95 km) |
| South River to Plovdiv | 4,820.46 mi (7,757.78 km) |
| South River to Pomorie | 4,919.05 mi (7,916.44 km) |
