| Porsgrunn to Travagliato | 939.21 mi (1,511.52 km) |
| Porsgrunn to Traversetolo | 1,000.57 mi (1,610.26 km) |
| Porsgrunn to Trebaseleghe | 940.05 mi (1,512.86 km) |
| Porsgrunn to Trebisacce | 1,363.08 mi (2,193.67 km) |
| Porsgrunn to Trecastagni | 1,504.61 mi (2,421.44 km) |
| Porsgrunn to Trecate | 946.23 mi (1,522.81 km) |
| Porsgrunn to Treia | 1,102.64 mi (1,774.54 km) |
| Porsgrunn to Trento | 903.47 mi (1,454.00 km) |
| Porsgrunn to Trentola | 1,268.20 mi (2,040.97 km) |
| Porsgrunn to Trepuzzi | 1,343.39 mi (2,161.97 km) |
| Porsgrunn to Trescore Balneario | 926.95 mi (1,491.78 km) |
| Porsgrunn to Treviglio | 939.28 mi (1,511.63 km) |
| Porsgrunn to Trevignano | 929.90 mi (1,496.53 km) |
| Porsgrunn to Treviso | 934.79 mi (1,504.41 km) |
| Porsgrunn to Trezzano sul Naviglio | 945.74 mi (1,522.01 km) |
