| South Portland to Miranda de Ebro | 3,297.75 mi (5,307.22 km) |
| South Portland to Mislata | 3,515.65 mi (5,657.89 km) |
| South Portland to Moana | 3,039.62 mi (4,891.80 km) |
| South Portland to Moguer | 3,283.34 mi (5,284.02 km) |
| South Portland to Molina de Segura | 3,526.05 mi (5,674.63 km) |
| South Portland to Molins de Rey | 3,563.82 mi (5,735.42 km) |
| South Portland to Mollerusa | 3,505.63 mi (5,641.76 km) |
| South Portland to Mollet | 3,568.71 mi (5,743.28 km) |
| South Portland to Moncada | 3,569.28 mi (5,744.20 km) |
| South Portland to Moncada | 3,514.23 mi (5,655.61 km) |
| South Portland to Monforte de Lemos | 3,090.76 mi (4,974.10 km) |
| South Portland to Monforte del Cid | 3,537.80 mi (5,693.53 km) |
| South Portland to Mongat | 3,574.08 mi (5,751.93 km) |
| South Portland to Monovar | 3,530.75 mi (5,682.20 km) |
| South Portland to Monserrat | 3,510.80 mi (5,650.09 km) |
