| Donegal to Thorigny-sur-Marne | 609.70 mi (981.21 km) |
| Donegal to Thouare-sur-Loire | 586.48 mi (943.84 km) |
| Donegal to Thouars | 631.81 mi (1,016.81 km) |
| Donegal to Tinqueux | 634.96 mi (1,021.86 km) |
| Donegal to Tomblaine | 737.23 mi (1,186.45 km) |
| Donegal to Tonneins | 802.14 mi (1,290.91 km) |
| Donegal to Torcy | 609.28 mi (980.53 km) |
| Donegal to Toul | 726.45 mi (1,169.11 km) |
| Donegal to Toulon | 1,016.54 mi (1,635.97 km) |
| Donegal to Toulouse | 875.38 mi (1,408.78 km) |
| Donegal to Tourcoing | 543.66 mi (874.94 km) |
| Donegal to Tourlaville | 443.07 mi (713.05 km) |
| Donegal to Tournan-en-Brie | 618.41 mi (995.24 km) |
| Donegal to Tournefeuille | 874.39 mi (1,407.20 km) |
| Donegal to Tournon-sur-Rhone | 875.33 mi (1,408.71 km) |
