| Porsgrunn to Nordwalde | 493.53 mi (794.25 km) |
| Porsgrunn to Northeim | 512.03 mi (824.03 km) |
| Porsgrunn to Norvenich | 587.08 mi (944.81 km) |
| Porsgrunn to Nossen | 574.87 mi (925.16 km) |
| Porsgrunn to Nottuln | 505.02 mi (812.76 km) |
| Porsgrunn to Numbrecht | 573.66 mi (923.22 km) |
| Porsgrunn to Nuremberg | 669.80 mi (1,077.93 km) |
| Porsgrunn to Nurtingen | 724.42 mi (1,165.84 km) |
| Porsgrunn to Nussloch | 677.79 mi (1,090.79 km) |
| Porsgrunn to Ober-Ramstadt | 642.48 mi (1,033.98 km) |
| Porsgrunn to Oberasbach | 671.63 mi (1,080.88 km) |
| Porsgrunn to Oberderdingen | 695.56 mi (1,119.39 km) |
| Porsgrunn to Oberhaching | 770.62 mi (1,240.20 km) |
| Porsgrunn to Oberhausen | 538.00 mi (865.83 km) |
| Porsgrunn to Oberhausen-Rheinhausen | 682.68 mi (1,098.67 km) |
