| SeaTac to Trezzo sull'Adda | 5,377.11 mi (8,653.62 km) |
| SeaTac to Tricase | 5,934.19 mi (9,550.16 km) |
| SeaTac to Trieste | 5,476.64 mi (8,813.80 km) |
| SeaTac to Triggiano | 5,830.47 mi (9,383.24 km) |
| SeaTac to Trinitapoli | 5,793.96 mi (9,324.48 km) |
| SeaTac to Trissino | 5,424.93 mi (8,730.58 km) |
| SeaTac to Triuggio | 5,367.37 mi (8,637.94 km) |
| SeaTac to Trofarello | 5,368.55 mi (8,639.84 km) |
| SeaTac to Troina | 5,976.59 mi (9,618.40 km) |
| SeaTac to Turin | 5,361.45 mi (8,628.42 km) |
| SeaTac to Udine | 5,438.99 mi (8,753.21 km) |
| SeaTac to Ugento | 5,929.63 mi (9,542.81 km) |
| SeaTac to Umbertide | 5,584.68 mi (8,987.68 km) |
| SeaTac to Urbino | 5,566.42 mi (8,958.29 km) |
| SeaTac to Urgnano | 5,382.16 mi (8,661.74 km) |
