| Portsmouth to Moncalieri | 570.21 mi (917.66 km) |
| Portsmouth to Mondolfo | 822.31 mi (1,323.38 km) |
| Portsmouth to Mondovi | 606.64 mi (976.30 km) |
| Portsmouth to Monesiglio | 611.86 mi (984.70 km) |
| Portsmouth to Monfalcone | 753.94 mi (1,213.34 km) |
| Portsmouth to Monopoli | 1,111.05 mi (1,788.06 km) |
| Portsmouth to Monreale | 1,125.37 mi (1,811.10 km) |
| Portsmouth to Monselice | 705.76 mi (1,135.80 km) |
| Portsmouth to Monserrato | 940.03 mi (1,512.84 km) |
| Portsmouth to Monsummano | 733.64 mi (1,180.68 km) |
| Portsmouth to Montagnana | 694.84 mi (1,118.24 km) |
| Portsmouth to Montale | 737.49 mi (1,186.87 km) |
| Portsmouth to Montalto di Castro | 837.11 mi (1,347.19 km) |
| Portsmouth to Montalto Uffugo | 1,147.01 mi (1,845.93 km) |
| Portsmouth to Monte Compatri | 903.83 mi (1,454.58 km) |
