| Arecibo to Smolyan | 5,452.67 mi (8,775.22 km) |
| Arecibo to Sofia | 5,365.53 mi (8,634.98 km) |
| Arecibo to Sopot | 5,436.28 mi (8,748.86 km) |
| Arecibo to Sozopol | 5,585.23 mi (8,988.56 km) |
| Arecibo to Sredets | 5,562.07 mi (8,951.29 km) |
| Arecibo to Stamboliyski | 5,434.66 mi (8,746.24 km) |
| Arecibo to Stara Zagora | 5,484.42 mi (8,826.32 km) |
| Arecibo to Svilengrad | 5,523.95 mi (8,889.94 km) |
| Arecibo to Svishtov | 5,448.42 mi (8,768.39 km) |
| Arecibo to Targovishte | 5,514.80 mi (8,875.22 km) |
| Arecibo to Teteven | 5,407.93 mi (8,703.23 km) |
| Arecibo to Troyan | 5,430.56 mi (8,739.64 km) |
| Arecibo to Tryavna | 5,469.17 mi (8,801.79 km) |
| Arecibo to Tutrakan | 5,501.41 mi (8,853.66 km) |
| Arecibo to Varna | 5,579.89 mi (8,979.97 km) |
