| Porsgrunn to Oschatz | 556.16 mi (895.06 km) |
| Porsgrunn to Oschersleben | 494.13 mi (795.22 km) |
| Porsgrunn to Osnabruck | 476.43 mi (766.74 km) |
| Porsgrunn to Ostbevern | 494.29 mi (795.49 km) |
| Porsgrunn to Osterburg | 444.64 mi (715.58 km) |
| Porsgrunn to Ostercappeln | 470.94 mi (757.91 km) |
| Porsgrunn to Osterhofen | 731.79 mi (1,177.70 km) |
| Porsgrunn to Osterholz-Scharmbeck | 409.07 mi (658.33 km) |
| Porsgrunn to Osternienburg | 513.39 mi (826.23 km) |
| Porsgrunn to Osterode | 510.83 mi (822.10 km) |
| Porsgrunn to Osterwieck | 495.49 mi (797.42 km) |
| Porsgrunn to Ostfildern | 717.59 mi (1,154.84 km) |
| Porsgrunn to Osthofen | 652.35 mi (1,049.85 km) |
| Porsgrunn to Ostrhauderfehn | 422.20 mi (679.47 km) |
| Porsgrunn to Ostringen | 684.93 mi (1,102.30 km) |
