| Porsgrunn to Montana | 1,227.23 mi (1,975.04 km) |
| Porsgrunn to Nova Zagora | 1,343.32 mi (2,161.86 km) |
| Porsgrunn to Novi Iskar | 1,268.42 mi (2,041.33 km) |
| Porsgrunn to Novi Pazar | 1,317.55 mi (2,120.39 km) |
| Porsgrunn to Omurtag | 1,314.63 mi (2,115.70 km) |
| Porsgrunn to Panagyurishte | 1,304.04 mi (2,098.65 km) |
| Porsgrunn to Parvomay | 1,350.64 mi (2,173.64 km) |
| Porsgrunn to Pavlikeni | 1,281.31 mi (2,062.07 km) |
| Porsgrunn to Pazardzhik | 1,326.11 mi (2,134.17 km) |
| Porsgrunn to Pernik | 1,275.11 mi (2,052.10 km) |
| Porsgrunn to Peshtera | 1,336.03 mi (2,150.14 km) |
| Porsgrunn to Petrich | 1,355.86 mi (2,182.05 km) |
| Porsgrunn to Pleven | 1,255.89 mi (2,021.16 km) |
| Porsgrunn to Plovdiv | 1,337.77 mi (2,152.93 km) |
| Porsgrunn to Pomorie | 1,375.14 mi (2,213.08 km) |
