| Gahanna to Montalegre | 3,789.09 mi (6,097.95 km) |
| Gahanna to Montemor-o-Novo | 3,865.32 mi (6,220.63 km) |
| Gahanna to Montemor-o-Velho | 3,796.41 mi (6,109.73 km) |
| Gahanna to Montijo | 3,831.38 mi (6,166.02 km) |
| Gahanna to Mortagua | 3,809.71 mi (6,131.14 km) |
| Gahanna to Moura | 3,918.58 mi (6,306.34 km) |
| Gahanna to Murtosa | 3,781.82 mi (6,086.25 km) |
| Gahanna to Nazare | 3,795.26 mi (6,107.87 km) |
| Gahanna to Nelas | 3,825.32 mi (6,156.25 km) |
| Gahanna to Obidos | 3,798.25 mi (6,112.69 km) |
| Gahanna to Odemira | 3,878.87 mi (6,242.44 km) |
| Gahanna to Odivelas | 3,814.59 mi (6,139.00 km) |
| Gahanna to Oeiras | 3,811.29 mi (6,133.68 km) |
| Gahanna to Olhao | 3,935.34 mi (6,333.31 km) |
| Gahanna to Oliveira de Azemeis | 3,786.12 mi (6,093.17 km) |
