| Santurce-Antiguo to Marasesti | 1,489.94 mi (2,397.83 km) |
| Santurce-Antiguo to Marghita | 1,256.76 mi (2,022.55 km) |
| Santurce-Antiguo to Marginea | 1,421.17 mi (2,287.15 km) |
| Santurce-Antiguo to Matca | 1,504.65 mi (2,421.50 km) |
| Santurce-Antiguo to Medgidia | 1,552.61 mi (2,498.68 km) |
| Santurce-Antiguo to Media | 1,350.99 mi (2,174.21 km) |
| Santurce-Antiguo to Miercurea-Ciuc | 1,419.85 mi (2,285.03 km) |
| Santurce-Antiguo to Mioveni | 1,384.52 mi (2,228.17 km) |
| Santurce-Antiguo to Mizil | 1,457.18 mi (2,345.11 km) |
| Santurce-Antiguo to Moinesti | 1,452.11 mi (2,336.95 km) |
| Santurce-Antiguo to Moisei | 1,360.61 mi (2,189.69 km) |
| Santurce-Antiguo to Moldova Noua | 1,225.91 mi (1,972.91 km) |
| Santurce-Antiguo to Moreni | 1,418.61 mi (2,283.04 km) |
| Santurce-Antiguo to Motru | 1,289.37 mi (2,075.04 km) |
| Santurce-Antiguo to Murfatlar | 1,560.61 mi (2,511.56 km) |
