| Healdsburg to Trezzo sull'Adda | 5,910.89 mi (9,512.66 km) |
| Healdsburg to Tricase | 6,481.57 mi (10,431.08 km) |
| Healdsburg to Trieste | 6,023.14 mi (9,693.31 km) |
| Healdsburg to Triggiano | 6,375.74 mi (10,260.76 km) |
| Healdsburg to Trinitapoli | 6,337.28 mi (10,198.87 km) |
| Healdsburg to Trissino | 5,964.17 mi (9,598.41 km) |
| Healdsburg to Triuggio | 5,900.54 mi (9,496.00 km) |
| Healdsburg to Trofarello | 5,894.90 mi (9,486.92 km) |
| Healdsburg to Troina | 6,505.93 mi (10,470.28 km) |
| Healdsburg to Turin | 5,887.91 mi (9,475.68 km) |
| Healdsburg to Udine | 5,984.97 mi (9,631.88 km) |
| Healdsburg to Ugento | 6,476.36 mi (10,422.70 km) |
| Healdsburg to Umbertide | 6,120.87 mi (9,850.59 km) |
| Healdsburg to Urbino | 6,104.69 mi (9,824.54 km) |
| Healdsburg to Urgnano | 5,916.44 mi (9,521.59 km) |
