| Monrovia to Smolyan | 6,692.79 mi (10,771.01 km) |
| Monrovia to Sofia | 6,590.58 mi (10,606.51 km) |
| Monrovia to Sopot | 6,630.44 mi (10,670.67 km) |
| Monrovia to Sozopol | 6,717.66 mi (10,811.03 km) |
| Monrovia to Sredets | 6,709.65 mi (10,798.14 km) |
| Monrovia to Stamboliyski | 6,655.67 mi (10,711.27 km) |
| Monrovia to Stara Zagora | 6,666.27 mi (10,728.32 km) |
| Monrovia to Svilengrad | 6,720.24 mi (10,815.17 km) |
| Monrovia to Svishtov | 6,587.72 mi (10,601.91 km) |
| Monrovia to Targovishte | 6,640.09 mi (10,686.19 km) |
| Monrovia to Teteven | 6,602.15 mi (10,625.13 km) |
| Monrovia to Troyan | 6,615.67 mi (10,646.89 km) |
| Monrovia to Tryavna | 6,636.46 mi (10,680.35 km) |
| Monrovia to Tutrakan | 6,592.46 mi (10,609.54 km) |
| Monrovia to Varna | 6,673.97 mi (10,740.72 km) |
