| Olney to Montalegre | 3,543.43 mi (5,702.60 km) |
| Olney to Montemor-o-Novo | 3,607.33 mi (5,805.44 km) |
| Olney to Montemor-o-Velho | 3,543.28 mi (5,702.36 km) |
| Olney to Montijo | 3,572.63 mi (5,749.60 km) |
| Olney to Mortagua | 3,558.16 mi (5,726.30 km) |
| Olney to Moura | 3,659.80 mi (5,889.88 km) |
| Olney to Murtosa | 3,530.88 mi (5,682.41 km) |
| Olney to Nazare | 3,539.56 mi (5,696.38 km) |
| Olney to Nelas | 3,574.56 mi (5,752.71 km) |
| Olney to Obidos | 3,541.56 mi (5,699.60 km) |
| Olney to Odemira | 3,616.69 mi (5,820.50 km) |
| Olney to Odivelas | 3,555.86 mi (5,722.61 km) |
| Olney to Oeiras | 3,552.01 mi (5,716.40 km) |
| Olney to Olhao | 3,672.34 mi (5,910.05 km) |
| Olney to Oliveira de Azemeis | 3,535.79 mi (5,690.30 km) |
