| Civitavecchia to Masquefa | 515.71 mi (829.96 km) |
| Civitavecchia to Matadepera | 504.00 mi (811.11 km) |
| Civitavecchia to Mazarron | 760.93 mi (1,224.59 km) |
| Civitavecchia to Meco | 791.00 mi (1,272.99 km) |
| Civitavecchia to Medina del Campo | 862.77 mi (1,388.49 km) |
| Civitavecchia to Medina Sidonia | 1,021.85 mi (1,644.50 km) |
| Civitavecchia to Mejorada del Campo | 796.52 mi (1,281.87 km) |
| Civitavecchia to Meliana | 659.06 mi (1,060.65 km) |
| Civitavecchia to Mengibar | 872.17 mi (1,403.62 km) |
| Civitavecchia to Merida | 976.00 mi (1,570.71 km) |
| Civitavecchia to Miajadas | 956.95 mi (1,540.07 km) |
| Civitavecchia to Mieres | 894.73 mi (1,439.93 km) |
| Civitavecchia to Miguelturra | 853.55 mi (1,373.66 km) |
| Civitavecchia to Mijas | 954.67 mi (1,536.40 km) |
| Civitavecchia to Miranda de Ebro | 751.95 mi (1,210.15 km) |
