| Riviera Beach to Montalegre | 4,132.22 mi (6,650.16 km) |
| Riviera Beach to Montemor-o-Novo | 4,152.38 mi (6,682.61 km) |
| Riviera Beach to Montemor-o-Velho | 4,107.40 mi (6,610.23 km) |
| Riviera Beach to Montijo | 4,115.81 mi (6,623.76 km) |
| Riviera Beach to Mortagua | 4,127.25 mi (6,642.16 km) |
| Riviera Beach to Moura | 4,200.51 mi (6,760.07 km) |
| Riviera Beach to Murtosa | 4,102.79 mi (6,602.80 km) |
| Riviera Beach to Nazare | 4,094.78 mi (6,589.90 km) |
| Riviera Beach to Nelas | 4,145.93 mi (6,672.23 km) |
| Riviera Beach to Obidos | 4,093.17 mi (6,587.32 km) |
| Riviera Beach to Odemira | 4,145.63 mi (6,671.75 km) |
| Riviera Beach to Odivelas | 4,099.58 mi (6,597.63 km) |
| Riviera Beach to Oeiras | 4,093.78 mi (6,588.30 km) |
| Riviera Beach to Olhao | 4,196.53 mi (6,753.66 km) |
| Riviera Beach to Oliveira de Azemeis | 4,109.59 mi (6,613.75 km) |
