| Didcot to Melzo | 643.50 mi (1,035.62 km) |
| Didcot to Mendicino | 1,194.91 mi (1,923.02 km) |
| Didcot to Menfi | 1,188.79 mi (1,913.17 km) |
| Didcot to Mentana | 930.00 mi (1,496.69 km) |
| Didcot to Merano | 654.88 mi (1,053.92 km) |
| Didcot to Merate | 634.42 mi (1,021.00 km) |
| Didcot to Mercato San Severino | 1,065.78 mi (1,715.21 km) |
| Didcot to Mercogliano | 1,057.60 mi (1,702.04 km) |
| Didcot to Mesagne | 1,182.99 mi (1,903.83 km) |
| Didcot to Messina | 1,232.77 mi (1,983.95 km) |
| Didcot to Mestre | 745.58 mi (1,199.90 km) |
| Didcot to Mestrino | 729.84 mi (1,174.57 km) |
| Didcot to Milan | 637.37 mi (1,025.75 km) |
| Didcot to Milazzo | 1,221.41 mi (1,965.68 km) |
| Didcot to Minerbio | 757.82 mi (1,219.60 km) |
