| Gahanna to Mangualde | 3,826.87 mi (6,158.75 km) |
| Gahanna to Marco de Canavezes | 3,791.22 mi (6,101.38 km) |
| Gahanna to Marinha Grande | 3,797.08 mi (6,110.82 km) |
| Gahanna to Massama | 3,811.04 mi (6,133.28 km) |
| Gahanna to Matosinhos | 3,765.36 mi (6,059.76 km) |
| Gahanna to Mealhada | 3,800.96 mi (6,117.05 km) |
| Gahanna to Melgaco | 3,758.41 mi (6,048.57 km) |
| Gahanna to Melres | 3,782.92 mi (6,088.02 km) |
| Gahanna to Mira | 3,786.03 mi (6,093.03 km) |
| Gahanna to Miranda do Corvo | 3,815.05 mi (6,139.73 km) |
| Gahanna to Mirandela | 3,827.55 mi (6,159.85 km) |
| Gahanna to Mogadouro | 3,853.82 mi (6,202.12 km) |
| Gahanna to Moimenta da Beira | 3,822.49 mi (6,151.70 km) |
| Gahanna to Moita | 3,828.40 mi (6,161.22 km) |
| Gahanna to Moncao | 3,749.73 mi (6,034.61 km) |
