| Sliven to Naron | 1,727.69 mi (2,780.45 km) |
| Sliven to Navalcarnero | 1,570.98 mi (2,528.25 km) |
| Sliven to Navalmoral de la Mata | 1,655.94 mi (2,664.98 km) |
| Sliven to Nerja | 1,647.68 mi (2,651.69 km) |
| Sliven to Nigran | 1,779.86 mi (2,864.41 km) |
| Sliven to Nijar | 1,556.58 mi (2,505.08 km) |
| Sliven to Novelda | 1,447.21 mi (2,329.06 km) |
| Sliven to Noya | 1,774.08 mi (2,855.10 km) |
| Sliven to Nules | 1,383.43 mi (2,226.42 km) |
| Sliven to Ocana | 1,551.18 mi (2,496.39 km) |
| Sliven to Ogijares | 1,623.38 mi (2,612.58 km) |
| Sliven to Oleiros | 1,738.60 mi (2,798.00 km) |
| Sliven to Olesa de Montserrat | 1,250.69 mi (2,012.79 km) |
| Sliven to Oliva | 1,401.84 mi (2,256.05 km) |
| Sliven to Olivares | 1,744.81 mi (2,808.00 km) |
