| Gretna to Mexborough | 4,537.70 mi (7,302.72 km) |
| Gretna to Mickleover | 4,539.91 mi (7,306.28 km) |
| Gretna to Middlesbrough | 4,516.79 mi (7,269.07 km) |
| Gretna to Middleton | 4,501.15 mi (7,243.90 km) |
| Gretna to Middlewich | 4,498.54 mi (7,239.70 km) |
| Gretna to Midsomer Norton | 4,537.07 mi (7,301.71 km) |
| Gretna to Mildenhall | 4,634.14 mi (7,457.93 km) |
| Gretna to Milford Haven | 4,423.06 mi (7,118.23 km) |
| Gretna to Mill Hill | 4,621.36 mi (7,437.35 km) |
| Gretna to Milngavie | 4,374.19 mi (7,039.57 km) |
| Gretna to Milnrow | 4,502.99 mi (7,246.86 km) |
| Gretna to Milton | 4,513.39 mi (7,263.60 km) |
| Gretna to Milton Keynes | 4,590.42 mi (7,387.57 km) |
| Gretna to Minehead | 4,497.91 mi (7,238.69 km) |
| Gretna to Minster | 4,668.04 mi (7,512.48 km) |
