| Seclin to Tricase | 1,042.37 mi (1,677.53 km) |
| Seclin to Trieste | 599.22 mi (964.35 km) |
| Seclin to Triggiano | 933.35 mi (1,502.08 km) |
| Seclin to Trinitapoli | 890.92 mi (1,433.80 km) |
| Seclin to Trissino | 515.88 mi (830.22 km) |
| Seclin to Triuggio | 443.04 mi (713.01 km) |
| Seclin to Trofarello | 442.02 mi (711.36 km) |
| Seclin to Troina | 1,049.27 mi (1,688.64 km) |
| Seclin to Turin | 434.85 mi (699.83 km) |
| Seclin to Udine | 561.18 mi (903.13 km) |
| Seclin to Ugento | 1,035.55 mi (1,666.56 km) |
| Seclin to Umbertide | 664.98 mi (1,070.18 km) |
| Seclin to Urbino | 651.79 mi (1,048.95 km) |
| Seclin to Urgnano | 459.77 mi (739.92 km) |
| Seclin to Usmate Velate | 446.44 mi (718.48 km) |
