| Castelo Branco to Marly-le-Roi | 783.39 mi (1,260.75 km) |
| Castelo Branco to Marmande | 508.37 mi (818.15 km) |
| Castelo Branco to Maromme | 787.68 mi (1,267.65 km) |
| Castelo Branco to Marquette-les-Lille | 907.49 mi (1,460.47 km) |
| Castelo Branco to Marseille | 706.61 mi (1,137.18 km) |
| Castelo Branco to Martigues | 693.13 mi (1,115.48 km) |
| Castelo Branco to Massy | 781.62 mi (1,257.90 km) |
| Castelo Branco to Maubeuge | 912.18 mi (1,468.01 km) |
| Castelo Branco to Mauguio | 648.22 mi (1,043.22 km) |
| Castelo Branco to Mauleon | 596.16 mi (959.43 km) |
| Castelo Branco to Maurepas | 773.53 mi (1,244.88 km) |
| Castelo Branco to Maxeville | 911.12 mi (1,466.30 km) |
| Castelo Branco to Mayenne | 678.11 mi (1,091.32 km) |
| Castelo Branco to Mazamet | 568.93 mi (915.61 km) |
| Castelo Branco to Meaux | 812.21 mi (1,307.13 km) |
