| Porsgrunn to Butzbach | 601.09 mi (967.36 km) |
| Porsgrunn to Buxtehude | 389.60 mi (627.00 km) |
| Porsgrunn to Cadolzburg | 669.43 mi (1,077.34 km) |
| Porsgrunn to Calbe | 504.77 mi (812.35 km) |
| Porsgrunn to Calw | 719.57 mi (1,158.04 km) |
| Porsgrunn to Castrop-Rauxel | 531.04 mi (854.62 km) |
| Porsgrunn to Celle | 448.65 mi (722.03 km) |
| Porsgrunn to Cham | 694.04 mi (1,116.94 km) |
| Porsgrunn to Chemnitz | 586.04 mi (943.13 km) |
| Porsgrunn to Clausthal-Zellerfeld | 505.70 mi (813.85 km) |
| Porsgrunn to Cloppenburg | 437.60 mi (704.26 km) |
| Porsgrunn to Coburg | 613.43 mi (987.22 km) |
| Porsgrunn to Coesfeld | 504.89 mi (812.54 km) |
| Porsgrunn to Cologne | 575.45 mi (926.10 km) |
| Porsgrunn to Coswig | 572.12 mi (920.73 km) |
