| Romeoville to Melzo | 4,566.33 mi (7,348.79 km) |
| Romeoville to Mendicino | 5,104.96 mi (8,215.64 km) |
| Romeoville to Menfi | 5,046.42 mi (8,121.43 km) |
| Romeoville to Mentana | 4,840.40 mi (7,789.88 km) |
| Romeoville to Merano | 4,586.18 mi (7,380.74 km) |
| Romeoville to Merate | 4,558.89 mi (7,336.82 km) |
| Romeoville to Mercato San Severino | 4,979.27 mi (8,013.35 km) |
| Romeoville to Mercogliano | 4,972.10 mi (8,001.82 km) |
| Romeoville to Mesagne | 5,109.37 mi (8,222.73 km) |
| Romeoville to Messina | 5,127.42 mi (8,251.79 km) |
| Romeoville to Mestre | 4,676.41 mi (7,525.95 km) |
| Romeoville to Mestrino | 4,659.92 mi (7,499.42 km) |
| Romeoville to Milan | 4,558.76 mi (7,336.61 km) |
| Romeoville to Milazzo | 5,113.35 mi (8,229.14 km) |
| Romeoville to Minerbio | 4,683.21 mi (7,536.89 km) |
