| Olean to Mangualde | 3,557.41 mi (5,725.11 km) |
| Olean to Marco de Canavezes | 3,521.52 mi (5,667.35 km) |
| Olean to Marinha Grande | 3,528.47 mi (5,678.52 km) |
| Olean to Massama | 3,543.29 mi (5,702.38 km) |
| Olean to Matosinhos | 3,495.78 mi (5,625.91 km) |
| Olean to Mealhada | 3,531.80 mi (5,683.88 km) |
| Olean to Melgaco | 3,488.27 mi (5,613.83 km) |
| Olean to Melres | 3,513.34 mi (5,654.18 km) |
| Olean to Mira | 3,516.90 mi (5,659.91 km) |
| Olean to Miranda do Corvo | 3,546.04 mi (5,706.80 km) |
| Olean to Mirandela | 3,557.53 mi (5,725.29 km) |
| Olean to Mogadouro | 3,583.79 mi (5,767.55 km) |
| Olean to Moimenta da Beira | 3,552.80 mi (5,717.68 km) |
| Olean to Moita | 3,560.64 mi (5,730.30 km) |
| Olean to Moncao | 3,479.65 mi (5,599.95 km) |
