| Didcot to Masanasa | 843.75 mi (1,357.88 km) |
| Didcot to Masquefa | 712.77 mi (1,147.09 km) |
| Didcot to Matadepera | 708.08 mi (1,139.54 km) |
| Didcot to Mazarron | 967.84 mi (1,557.60 km) |
| Didcot to Meco | 770.05 mi (1,239.28 km) |
| Didcot to Medina del Campo | 733.01 mi (1,179.67 km) |
| Didcot to Medina Sidonia | 1,070.93 mi (1,723.50 km) |
| Didcot to Mejorada del Campo | 781.21 mi (1,257.23 km) |
| Didcot to Meliana | 835.66 mi (1,344.87 km) |
| Didcot to Mengibar | 950.49 mi (1,529.67 km) |
| Didcot to Merida | 911.60 mi (1,467.08 km) |
| Didcot to Miajadas | 891.42 mi (1,434.60 km) |
| Didcot to Mieres | 614.68 mi (989.23 km) |
| Didcot to Miguelturra | 883.00 mi (1,421.05 km) |
| Didcot to Mijas | 1,050.09 mi (1,689.95 km) |
