| Merrillville to Montalegre | 3,945.55 mi (6,349.75 km) |
| Merrillville to Montemor-o-Novo | 4,033.83 mi (6,491.83 km) |
| Merrillville to Montemor-o-Velho | 3,960.24 mi (6,373.39 km) |
| Merrillville to Montijo | 4,000.79 mi (6,438.64 km) |
| Merrillville to Mortagua | 3,971.93 mi (6,392.21 km) |
| Merrillville to Moura | 4,087.73 mi (6,578.57 km) |
| Merrillville to Murtosa | 3,943.52 mi (6,346.48 km) |
| Merrillville to Nazare | 3,961.67 mi (6,375.70 km) |
| Merrillville to Nelas | 3,986.68 mi (6,415.94 km) |
| Merrillville to Obidos | 3,965.66 mi (6,382.11 km) |
| Merrillville to Odemira | 4,051.64 mi (6,520.49 km) |
| Merrillville to Odivelas | 3,984.03 mi (6,411.68 km) |
| Merrillville to Oeiras | 3,981.30 mi (6,407.28 km) |
| Merrillville to Olhao | 4,108.78 mi (6,612.45 km) |
| Merrillville to Oliveira de Azemeis | 3,947.20 mi (6,352.40 km) |
