| Catonsville to Mexborough | 3,548.84 mi (5,711.31 km) |
| Catonsville to Mickleover | 3,549.92 mi (5,713.04 km) |
| Catonsville to Middlesbrough | 3,530.20 mi (5,681.31 km) |
| Catonsville to Middleton | 3,512.09 mi (5,652.17 km) |
| Catonsville to Middlewich | 3,508.76 mi (5,646.81 km) |
| Catonsville to Midsomer Norton | 3,544.78 mi (5,704.77 km) |
| Catonsville to Mildenhall | 3,643.92 mi (5,864.32 km) |
| Catonsville to Milford Haven | 3,430.72 mi (5,521.21 km) |
| Catonsville to Mill Hill | 3,629.93 mi (5,841.80 km) |
| Catonsville to Milngavie | 3,389.86 mi (5,455.46 km) |
| Catonsville to Milnrow | 3,514.06 mi (5,655.33 km) |
| Catonsville to Milton | 3,523.46 mi (5,670.46 km) |
| Catonsville to Milton Keynes | 3,599.38 mi (5,792.65 km) |
| Catonsville to Minehead | 3,505.37 mi (5,641.35 km) |
| Catonsville to Minster | 3,676.64 mi (5,916.98 km) |
