| Castelo Branco to Miedzychod | 1,413.85 mi (2,275.38 km) |
| Castelo Branco to Miedzyrzec Podlaski | 1,663.68 mi (2,677.43 km) |
| Castelo Branco to Miedzyrzecz | 1,397.90 mi (2,249.71 km) |
| Castelo Branco to Mielec | 1,572.91 mi (2,531.35 km) |
| Castelo Branco to Mikolow | 1,463.75 mi (2,355.67 km) |
| Castelo Branco to Milanowek | 1,583.25 mi (2,547.99 km) |
| Castelo Branco to Milicz | 1,433.43 mi (2,306.88 km) |
| Castelo Branco to Minsk Mazowiecki | 1,619.48 mi (2,606.31 km) |
| Castelo Branco to Mlawa | 1,597.08 mi (2,570.25 km) |
| Castelo Branco to Mogilno | 1,492.15 mi (2,401.39 km) |
| Castelo Branco to Monki | 1,698.11 mi (2,732.84 km) |
| Castelo Branco to Morag | 1,604.31 mi (2,581.89 km) |
| Castelo Branco to Mosina | 1,438.07 mi (2,314.35 km) |
| Castelo Branco to Mragowo | 1,653.21 mi (2,660.59 km) |
| Castelo Branco to Murowana Goslina | 1,454.62 mi (2,340.98 km) |
