| Santiponce to Popovo | 1,735.30 mi (2,792.69 km) |
| Santiponce to Provadia | 1,795.25 mi (2,889.18 km) |
| Santiponce to Radnevo | 1,718.17 mi (2,765.12 km) |
| Santiponce to Radomir | 1,566.66 mi (2,521.30 km) |
| Santiponce to Rakitovo | 1,623.09 mi (2,612.11 km) |
| Santiponce to Rakovski | 1,668.70 mi (2,685.51 km) |
| Santiponce to Razgrad | 1,750.08 mi (2,816.48 km) |
| Santiponce to Razlog | 1,591.26 mi (2,560.89 km) |
| Santiponce to Ruse | 1,723.13 mi (2,773.12 km) |
| Santiponce to Samokov | 1,596.79 mi (2,569.78 km) |
| Santiponce to Sandanski | 1,581.38 mi (2,544.99 km) |
| Santiponce to Sevlievo | 1,677.91 mi (2,700.34 km) |
| Santiponce to Shumen | 1,770.28 mi (2,848.99 km) |
| Santiponce to Silistra | 1,789.25 mi (2,879.52 km) |
| Santiponce to Sliven | 1,738.90 mi (2,798.49 km) |
