| Round Rock to Mexborough | 4,797.10 mi (7,720.19 km) |
| Round Rock to Mickleover | 4,803.66 mi (7,730.75 km) |
| Round Rock to Middlesbrough | 4,768.92 mi (7,674.84 km) |
| Round Rock to Middleton | 4,761.53 mi (7,662.93 km) |
| Round Rock to Middlewich | 4,761.70 mi (7,663.22 km) |
| Round Rock to Midsomer Norton | 4,812.74 mi (7,745.35 km) |
| Round Rock to Mildenhall | 4,898.25 mi (7,882.98 km) |
| Round Rock to Milford Haven | 4,699.70 mi (7,563.43 km) |
| Round Rock to Mill Hill | 4,891.31 mi (7,871.81 km) |
| Round Rock to Milngavie | 4,621.11 mi (7,436.95 km) |
| Round Rock to Milnrow | 4,762.88 mi (7,665.12 km) |
| Round Rock to Milton | 4,777.05 mi (7,687.92 km) |
| Round Rock to Milton Keynes | 4,858.54 mi (7,819.06 km) |
| Round Rock to Minehead | 4,775.59 mi (7,685.57 km) |
| Round Rock to Minster | 4,937.53 mi (7,946.19 km) |
