| Webster Groves to Melzo | 4,794.95 mi (7,716.73 km) |
| Webster Groves to Mendicino | 5,330.78 mi (8,579.07 km) |
| Webster Groves to Menfi | 5,267.43 mi (8,477.11 km) |
| Webster Groves to Mentana | 5,066.90 mi (8,154.39 km) |
| Webster Groves to Merano | 4,817.14 mi (7,752.44 km) |
| Webster Groves to Merate | 4,787.77 mi (7,705.17 km) |
| Webster Groves to Mercato San Severino | 5,205.81 mi (8,377.94 km) |
| Webster Groves to Mercogliano | 5,198.79 mi (8,366.65 km) |
| Webster Groves to Mesagne | 5,337.86 mi (8,590.46 km) |
| Webster Groves to Messina | 5,351.43 mi (8,612.29 km) |
| Webster Groves to Mestre | 4,906.69 mi (7,896.55 km) |
| Webster Groves to Mestrino | 4,889.88 mi (7,869.50 km) |
| Webster Groves to Milan | 4,787.21 mi (7,704.26 km) |
| Webster Groves to Milazzo | 5,337.12 mi (8,589.26 km) |
| Webster Groves to Minerbio | 4,912.03 mi (7,905.16 km) |
