| Catonsville to Melzo | 4,201.28 mi (6,761.31 km) |
| Catonsville to Mendicino | 4,718.69 mi (7,594.00 km) |
| Catonsville to Menfi | 4,635.30 mi (7,459.79 km) |
| Catonsville to Mentana | 4,459.94 mi (7,177.58 km) |
| Catonsville to Merano | 4,237.19 mi (6,819.10 km) |
| Catonsville to Merate | 4,195.57 mi (6,752.11 km) |
| Catonsville to Mercato San Severino | 4,598.05 mi (7,399.85 km) |
| Catonsville to Mercogliano | 4,591.82 mi (7,389.82 km) |
| Catonsville to Mesagne | 4,739.20 mi (7,627.00 km) |
| Catonsville to Messina | 4,730.97 mi (7,613.76 km) |
| Catonsville to Mestre | 4,321.66 mi (6,955.04 km) |
| Catonsville to Mestrino | 4,303.08 mi (6,925.14 km) |
| Catonsville to Milan | 4,192.62 mi (6,747.38 km) |
| Catonsville to Milazzo | 4,715.74 mi (7,589.25 km) |
| Catonsville to Minerbio | 4,318.52 mi (6,949.98 km) |
