| Rockville Centre to Montalegre | 3,334.06 mi (5,365.65 km) |
| Rockville Centre to Montemor-o-Novo | 3,399.59 mi (5,471.11 km) |
| Rockville Centre to Montemor-o-Velho | 3,334.75 mi (5,366.77 km) |
| Rockville Centre to Montijo | 3,365.02 mi (5,415.48 km) |
| Rockville Centre to Mortagua | 3,349.42 mi (5,390.38 km) |
| Rockville Centre to Moura | 3,452.22 mi (5,555.81 km) |
| Rockville Centre to Murtosa | 3,322.06 mi (5,346.34 km) |
| Rockville Centre to Nazare | 3,331.42 mi (5,361.40 km) |
| Rockville Centre to Nelas | 3,365.73 mi (5,416.62 km) |
| Rockville Centre to Obidos | 3,333.58 mi (5,364.88 km) |
| Rockville Centre to Odemira | 3,409.78 mi (5,487.51 km) |
| Rockville Centre to Odivelas | 3,348.24 mi (5,388.48 km) |
| Rockville Centre to Oeiras | 3,344.49 mi (5,382.43 km) |
| Rockville Centre to Olhao | 3,465.62 mi (5,577.37 km) |
| Rockville Centre to Oliveira de Azemeis | 3,326.90 mi (5,354.12 km) |
