| Idaho Falls to Trezzo sull'Adda | 5,315.30 mi (8,554.15 km) |
| Idaho Falls to Tricase | 5,896.76 mi (9,489.93 km) |
| Idaho Falls to Trieste | 5,439.86 mi (8,754.61 km) |
| Idaho Falls to Triggiano | 5,789.20 mi (9,316.82 km) |
| Idaho Falls to Trinitapoli | 5,748.89 mi (9,251.95 km) |
| Idaho Falls to Trissino | 5,373.58 mi (8,647.94 km) |
| Idaho Falls to Triuggio | 5,304.44 mi (8,536.67 km) |
| Idaho Falls to Trofarello | 5,292.80 mi (8,517.95 km) |
| Idaho Falls to Troina | 5,903.48 mi (9,500.73 km) |
| Idaho Falls to Turin | 5,285.95 mi (8,506.91 km) |
| Idaho Falls to Udine | 5,401.33 mi (8,692.60 km) |
| Idaho Falls to Ugento | 5,890.88 mi (9,480.46 km) |
| Idaho Falls to Umbertide | 5,526.48 mi (8,894.02 km) |
| Idaho Falls to Urbino | 5,512.39 mi (8,871.33 km) |
| Idaho Falls to Urgnano | 5,321.29 mi (8,563.79 km) |
