| Porsgrunn to Sangeorz-Bai | 1,015.75 mi (1,634.70 km) |
| Porsgrunn to Sannicolau Mare | 1,008.33 mi (1,622.74 km) |
| Porsgrunn to Santana | 1,007.22 mi (1,620.96 km) |
| Porsgrunn to Satu Mare | 948.35 mi (1,526.23 km) |
| Porsgrunn to Scobinti | 1,072.53 mi (1,726.08 km) |
| Porsgrunn to Scornicesti | 1,182.06 mi (1,902.35 km) |
| Porsgrunn to Sebes | 1,074.86 mi (1,729.81 km) |
| Porsgrunn to Seini | 960.02 mi (1,545.00 km) |
| Porsgrunn to Sfantu-Gheorghe | 1,132.06 mi (1,821.87 km) |
| Porsgrunn to Sibiu | 1,098.06 mi (1,767.15 km) |
| Porsgrunn to Sighetu Marmatiei | 963.70 mi (1,550.92 km) |
| Porsgrunn to Sighisoara | 1,087.08 mi (1,749.48 km) |
| Porsgrunn to Simeria | 1,069.51 mi (1,721.21 km) |
| Porsgrunn to Sinaia | 1,157.24 mi (1,862.39 km) |
| Porsgrunn to Slatina | 1,186.69 mi (1,909.80 km) |
