| Porsgrunn to Thorigny-sur-Marne | 761.34 mi (1,225.27 km) |
| Porsgrunn to Thouare-sur-Loire | 936.86 mi (1,507.73 km) |
| Porsgrunn to Thouars | 932.38 mi (1,500.51 km) |
| Porsgrunn to Tinqueux | 719.16 mi (1,157.38 km) |
| Porsgrunn to Tomblaine | 734.32 mi (1,181.78 km) |
| Porsgrunn to Tonneins | 1,091.56 mi (1,756.70 km) |
| Porsgrunn to Torcy | 764.06 mi (1,229.63 km) |
| Porsgrunn to Toul | 737.63 mi (1,187.10 km) |
| Porsgrunn to Toulon | 1,116.44 mi (1,796.73 km) |
| Porsgrunn to Toulouse | 1,127.46 mi (1,814.48 km) |
| Porsgrunn to Tourcoing | 634.74 mi (1,021.52 km) |
| Porsgrunn to Tourlaville | 794.53 mi (1,278.67 km) |
| Porsgrunn to Tournan-en-Brie | 769.48 mi (1,238.36 km) |
| Porsgrunn to Tournefeuille | 1,130.06 mi (1,818.66 km) |
| Porsgrunn to Tournon-sur-Rhone | 991.83 mi (1,596.20 km) |
