| Merriam to Montalegre | 4,365.65 mi (7,025.83 km) |
| Merriam to Montemor-o-Novo | 4,456.58 mi (7,172.17 km) |
| Merriam to Montemor-o-Velho | 4,382.13 mi (7,052.35 km) |
| Merriam to Montijo | 4,423.69 mi (7,119.24 km) |
| Merriam to Mortagua | 4,393.46 mi (7,070.60 km) |
| Merriam to Moura | 4,510.57 mi (7,259.05 km) |
| Merriam to Murtosa | 4,364.94 mi (7,024.69 km) |
| Merriam to Nazare | 4,384.07 mi (7,055.49 km) |
| Merriam to Nelas | 4,408.01 mi (7,094.00 km) |
| Merriam to Obidos | 4,388.23 mi (7,062.18 km) |
| Merriam to Odemira | 4,475.01 mi (7,201.83 km) |
| Merriam to Odivelas | 4,406.94 mi (7,092.29 km) |
| Merriam to Oeiras | 4,404.30 mi (7,088.03 km) |
| Merriam to Olhao | 4,532.22 mi (7,293.90 km) |
| Merriam to Oliveira de Azemeis | 4,368.48 mi (7,030.39 km) |
