| Olecko to Montemor-o-Novo | 1,787.12 mi (2,876.10 km) |
| Olecko to Montemor-o-Velho | 1,730.12 mi (2,784.35 km) |
| Olecko to Montijo | 1,810.90 mi (2,914.37 km) |
| Olecko to Mortagua | 1,700.26 mi (2,736.31 km) |
| Olecko to Moura | 1,785.04 mi (2,872.75 km) |
| Olecko to Murtosa | 1,701.20 mi (2,737.81 km) |
| Olecko to Nazare | 1,772.04 mi (2,851.82 km) |
| Olecko to Nelas | 1,681.75 mi (2,706.52 km) |
| Olecko to Obidos | 1,787.28 mi (2,876.34 km) |
| Olecko to Odemira | 1,856.57 mi (2,987.87 km) |
| Olecko to Odivelas | 1,816.06 mi (2,922.66 km) |
| Olecko to Oeiras | 1,826.51 mi (2,939.48 km) |
| Olecko to Olhao | 1,856.44 mi (2,987.65 km) |
| Olecko to Oliveira de Azemeis | 1,690.11 mi (2,719.97 km) |
| Olecko to Oliveira de Frades | 1,684.84 mi (2,711.49 km) |
