| Grefrath to Miedzyrzec Podlaski | 704.64 mi (1,134.01 km) |
| Grefrath to Miedzyrzecz | 401.44 mi (646.05 km) |
| Grefrath to Mielec | 661.75 mi (1,064.98 km) |
| Grefrath to Mikolow | 554.23 mi (891.94 km) |
| Grefrath to Milanowek | 615.16 mi (990.01 km) |
| Grefrath to Milicz | 471.08 mi (758.14 km) |
| Grefrath to Minsk Mazowiecki | 652.56 mi (1,050.19 km) |
| Grefrath to Mlawa | 605.17 mi (973.93 km) |
| Grefrath to Mogilno | 501.60 mi (807.25 km) |
| Grefrath to Monki | 707.85 mi (1,139.18 km) |
| Grefrath to Morag | 596.21 mi (959.51 km) |
| Grefrath to Mosina | 452.88 mi (728.84 km) |
| Grefrath to Mragowo | 650.25 mi (1,046.48 km) |
| Grefrath to Murowana Goslina | 462.05 mi (743.60 km) |
| Grefrath to Myslenice | 604.58 mi (972.97 km) |
