| Mariehamn to Tricase | 1,395.02 mi (2,245.07 km) |
| Mariehamn to Trieste | 1,029.84 mi (1,657.37 km) |
| Mariehamn to Triggiano | 1,321.38 mi (2,126.56 km) |
| Mariehamn to Trinitapoli | 1,305.77 mi (2,101.43 km) |
| Mariehamn to Trissino | 1,063.84 mi (1,712.09 km) |
| Mariehamn to Triuggio | 1,088.75 mi (1,752.17 km) |
| Mariehamn to Trofarello | 1,159.20 mi (1,865.55 km) |
| Mariehamn to Troina | 1,559.62 mi (2,509.96 km) |
| Mariehamn to Turin | 1,154.06 mi (1,857.28 km) |
| Mariehamn to Udine | 1,007.45 mi (1,621.33 km) |
| Mariehamn to Ugento | 1,395.47 mi (2,245.79 km) |
| Mariehamn to Umbertide | 1,203.65 mi (1,937.09 km) |
| Mariehamn to Urbino | 1,171.65 mi (1,885.59 km) |
| Mariehamn to Urgnano | 1,086.37 mi (1,748.35 km) |
| Mariehamn to Usmate Velate | 1,088.47 mi (1,751.72 km) |
