| Dundalk to Mexborough | 3,538.78 mi (5,695.12 km) |
| Dundalk to Mickleover | 3,539.74 mi (5,696.66 km) |
| Dundalk to Middlesbrough | 3,520.35 mi (5,665.45 km) |
| Dundalk to Middleton | 3,502.01 mi (5,635.95 km) |
| Dundalk to Middlewich | 3,498.61 mi (5,630.46 km) |
| Dundalk to Midsomer Norton | 3,534.28 mi (5,687.87 km) |
| Dundalk to Mildenhall | 3,633.71 mi (5,847.89 km) |
| Dundalk to Milford Haven | 3,420.21 mi (5,504.30 km) |
| Dundalk to Mill Hill | 3,619.56 mi (5,825.12 km) |
| Dundalk to Milngavie | 3,380.19 mi (5,439.89 km) |
| Dundalk to Milnrow | 3,503.99 mi (5,639.13 km) |
| Dundalk to Milton | 3,513.29 mi (5,654.09 km) |
| Dundalk to Milton Keynes | 3,589.07 mi (5,776.06 km) |
| Dundalk to Minehead | 3,494.82 mi (5,624.37 km) |
| Dundalk to Minster | 3,666.28 mi (5,900.31 km) |
