| Sliven to Reinosa | 1,535.32 mi (2,470.85 km) |
| Sliven to Requena | 1,439.25 mi (2,316.24 km) |
| Sliven to Reus | 1,296.29 mi (2,086.18 km) |
| Sliven to Rianxo | 1,772.70 mi (2,852.88 km) |
| Sliven to Ribadeo | 1,673.12 mi (2,692.63 km) |
| Sliven to Rincon de la Victoria | 1,669.01 mi (2,686.01 km) |
| Sliven to Ripoll | 1,227.26 mi (1,975.08 km) |
| Sliven to Ripollet | 1,238.06 mi (1,992.46 km) |
| Sliven to Rojales | 1,452.24 mi (2,337.16 km) |
| Sliven to Ronda | 1,713.12 mi (2,757.00 km) |
| Sliven to Roquetas de Mar | 1,583.20 mi (2,547.91 km) |
| Sliven to Rosas | 1,176.87 mi (1,893.98 km) |
| Sliven to Rubi | 1,244.43 mi (2,002.72 km) |
| Sliven to Rute | 1,656.91 mi (2,666.54 km) |
| Sliven to Sabadell | 1,239.86 mi (1,995.35 km) |
