| Arecibo to Popovo | 5,495.99 mi (8,844.95 km) |
| Arecibo to Provadia | 5,557.21 mi (8,943.46 km) |
| Arecibo to Radnevo | 5,500.81 mi (8,852.70 km) |
| Arecibo to Radomir | 5,349.22 mi (8,608.73 km) |
| Arecibo to Rakitovo | 5,414.93 mi (8,714.48 km) |
| Arecibo to Rakovski | 5,453.30 mi (8,776.24 km) |
| Arecibo to Razgrad | 5,506.27 mi (8,861.48 km) |
| Arecibo to Razlog | 5,385.91 mi (8,667.79 km) |
| Arecibo to Ruse | 5,473.82 mi (8,809.26 km) |
| Arecibo to Samokov | 5,382.71 mi (8,662.63 km) |
| Arecibo to Sandanski | 5,381.98 mi (8,661.45 km) |
| Arecibo to Sevlievo | 5,447.44 mi (8,766.81 km) |
| Arecibo to Shumen | 5,531.11 mi (8,901.46 km) |
| Arecibo to Silistra | 5,530.87 mi (8,901.07 km) |
| Arecibo to Sliven | 5,513.29 mi (8,872.78 km) |
