| Zierikzee to Montemor-o-Novo | 1,072.18 mi (1,725.51 km) |
| Zierikzee to Montemor-o-Velho | 995.23 mi (1,601.66 km) |
| Zierikzee to Montijo | 1,088.52 mi (1,751.80 km) |
| Zierikzee to Mortagua | 966.89 mi (1,556.06 km) |
| Zierikzee to Moura | 1,084.19 mi (1,744.84 km) |
| Zierikzee to Murtosa | 961.14 mi (1,546.81 km) |
| Zierikzee to Nazare | 1,039.15 mi (1,672.36 km) |
| Zierikzee to Nelas | 951.23 mi (1,530.86 km) |
| Zierikzee to Obidos | 1,055.88 mi (1,699.27 km) |
| Zierikzee to Odemira | 1,147.72 mi (1,847.08 km) |
| Zierikzee to Odivelas | 1,089.89 mi (1,754.00 km) |
| Zierikzee to Oeiras | 1,100.03 mi (1,770.33 km) |
| Zierikzee to Olhao | 1,162.24 mi (1,870.45 km) |
| Zierikzee to Oliveira de Azemeis | 950.39 mi (1,529.51 km) |
| Zierikzee to Oliveira de Frades | 949.03 mi (1,527.32 km) |
