| Merthyr Tudful to Totana | 969.66 mi (1,560.52 km) |
| Merthyr Tudful to Trujillo | 856.74 mi (1,378.79 km) |
| Merthyr Tudful to Tudela | 673.82 mi (1,084.40 km) |
| Merthyr Tudful to Tudela de Duero | 704.19 mi (1,133.28 km) |
| Merthyr Tudful to Tuineje | 1,710.05 mi (2,752.06 km) |
| Merthyr Tudful to Ubeda | 948.74 mi (1,526.85 km) |
| Merthyr Tudful to Ubrique | 1,045.46 mi (1,682.50 km) |
| Merthyr Tudful to Umbrete | 1,002.45 mi (1,613.28 km) |
| Merthyr Tudful to Utebo | 701.96 mi (1,129.70 km) |
| Merthyr Tudful to Utiel | 847.67 mi (1,364.20 km) |
| Merthyr Tudful to Utrera | 1,012.73 mi (1,629.83 km) |
| Merthyr Tudful to Valdemorillo | 777.39 mi (1,251.09 km) |
| Merthyr Tudful to Valdemoro | 798.30 mi (1,284.75 km) |
| Merthyr Tudful to Valdepenas | 896.58 mi (1,442.90 km) |
| Merthyr Tudful to Valencia | 860.11 mi (1,384.21 km) |
