| Mountain Ash to Mansfield | 136.66 mi (219.94 km) |
| Mountain Ash to March | 158.88 mi (255.69 km) |
| Mountain Ash to Margate | 205.70 mi (331.04 km) |
| Mountain Ash to Market Drayton | 92.57 mi (148.97 km) |
| Mountain Ash to Market Harborough | 117.99 mi (189.89 km) |
| Mountain Ash to Marlow | 111.75 mi (179.84 km) |
| Mountain Ash to Marple | 130.84 mi (210.56 km) |
| Mountain Ash to Marton | 216.93 mi (349.11 km) |
| Mountain Ash to Maryport | 209.50 mi (337.16 km) |
| Mountain Ash to Matlock | 126.88 mi (204.19 km) |
| Mountain Ash to Melksham | 57.50 mi (92.54 km) |
| Mountain Ash to Meltham | 146.75 mi (236.17 km) |
| Mountain Ash to Melton Mowbray | 129.42 mi (208.28 km) |
| Mountain Ash to Merthyr Tudful | 4.26 mi (6.85 km) |
| Mountain Ash to Methil | 311.46 mi (501.25 km) |
