| Covington to Smolyan | 5,312.88 mi (8,550.26 km) |
| Covington to Sofia | 5,209.37 mi (8,383.67 km) |
| Covington to Sopot | 5,266.41 mi (8,475.47 km) |
| Covington to Sozopol | 5,389.08 mi (8,672.88 km) |
| Covington to Sredets | 5,373.39 mi (8,647.64 km) |
| Covington to Stamboliyski | 5,281.46 mi (8,499.69 km) |
| Covington to Stara Zagora | 5,310.73 mi (8,546.79 km) |
| Covington to Svilengrad | 5,362.43 mi (8,629.99 km) |
| Covington to Svishtov | 5,245.36 mi (8,441.58 km) |
| Covington to Targovishte | 5,308.48 mi (8,543.17 km) |
| Covington to Teteven | 5,235.82 mi (8,426.23 km) |
| Covington to Troyan | 5,254.57 mi (8,456.41 km) |
| Covington to Tryavna | 5,285.19 mi (8,505.69 km) |
| Covington to Tutrakan | 5,272.85 mi (8,485.84 km) |
| Covington to Varna | 5,359.68 mi (8,625.58 km) |
