| Keystone to Mexborough | 4,334.15 mi (6,975.13 km) |
| Keystone to Mickleover | 4,331.33 mi (6,970.60 km) |
| Keystone to Middlesbrough | 4,321.84 mi (6,955.32 km) |
| Keystone to Middleton | 4,296.96 mi (6,915.28 km) |
| Keystone to Middlewich | 4,291.17 mi (6,905.98 km) |
| Keystone to Midsomer Norton | 4,314.78 mi (6,943.97 km) |
| Keystone to Mildenhall | 4,423.95 mi (7,119.67 km) |
| Keystone to Milford Haven | 4,201.07 mi (6,760.96 km) |
| Keystone to Mill Hill | 4,404.62 mi (7,088.55 km) |
| Keystone to Milngavie | 4,187.13 mi (6,738.54 km) |
| Keystone to Milnrow | 4,299.32 mi (6,919.09 km) |
| Keystone to Milton | 4,305.26 mi (6,928.65 km) |
| Keystone to Milton Keynes | 4,376.18 mi (7,042.78 km) |
| Keystone to Minehead | 4,273.76 mi (6,877.95 km) |
| Keystone to Minster | 4,451.25 mi (7,163.60 km) |
