| Sliven to Montemor-o-Novo | 1,819.09 mi (2,927.55 km) |
| Sliven to Montemor-o-Velho | 1,809.42 mi (2,911.98 km) |
| Sliven to Montijo | 1,852.96 mi (2,982.05 km) |
| Sliven to Mortagua | 1,781.39 mi (2,866.88 km) |
| Sliven to Moura | 1,792.63 mi (2,884.96 km) |
| Sliven to Murtosa | 1,795.75 mi (2,889.99 km) |
| Sliven to Nazare | 1,840.67 mi (2,962.28 km) |
| Sliven to Nelas | 1,760.44 mi (2,833.16 km) |
| Sliven to Obidos | 1,850.58 mi (2,978.22 km) |
| Sliven to Odemira | 1,866.60 mi (3,004.01 km) |
| Sliven to Odivelas | 1,864.62 mi (3,000.82 km) |
| Sliven to Oeiras | 1,874.08 mi (3,016.04 km) |
| Sliven to Olhao | 1,841.07 mi (2,962.92 km) |
| Sliven to Oliveira de Azemeis | 1,785.77 mi (2,873.93 km) |
| Sliven to Oliveira de Frades | 1,773.41 mi (2,854.03 km) |
