| Porsgrunn to Roeselare | 621.20 mi (999.72 km) |
| Porsgrunn to Ronse | 626.21 mi (1,007.79 km) |
| Porsgrunn to Rotselaar | 597.43 mi (961.47 km) |
| Porsgrunn to Rumst | 592.67 mi (953.80 km) |
| Porsgrunn to Saint-Ghislain | 642.53 mi (1,034.06 km) |
| Porsgrunn to Saint-Nicolas | 608.84 mi (979.83 km) |
| Porsgrunn to Saint-Vith | 626.51 mi (1,008.27 km) |
| Porsgrunn to Scherpenheuvel | 590.19 mi (949.82 km) |
| Porsgrunn to Schilde | 580.78 mi (934.67 km) |
| Porsgrunn to Schoten | 580.60 mi (934.38 km) |
| Porsgrunn to Seneffe | 631.04 mi (1,015.56 km) |
| Porsgrunn to Seraing | 612.54 mi (985.80 km) |
| Porsgrunn to Sint-Amandsberg | 604.27 mi (972.47 km) |
| Porsgrunn to Sint-Andries | 603.89 mi (971.87 km) |
| Porsgrunn to Sint-Genesius-Rode | 615.82 mi (991.07 km) |
