| Wheat Ridge to Smolyan | 5,994.27 mi (9,646.85 km) |
| Wheat Ridge to Sofia | 5,890.46 mi (9,479.78 km) |
| Wheat Ridge to Sopot | 5,936.36 mi (9,553.64 km) |
| Wheat Ridge to Sozopol | 6,036.34 mi (9,714.55 km) |
| Wheat Ridge to Sredets | 6,025.67 mi (9,697.38 km) |
| Wheat Ridge to Stamboliyski | 5,958.57 mi (9,589.39 km) |
| Wheat Ridge to Stara Zagora | 5,975.39 mi (9,616.46 km) |
| Wheat Ridge to Svilengrad | 6,029.26 mi (9,703.15 km) |
| Wheat Ridge to Svishtov | 5,900.21 mi (9,495.47 km) |
| Wheat Ridge to Targovishte | 5,956.78 mi (9,586.52 km) |
| Wheat Ridge to Teteven | 5,906.98 mi (9,506.36 km) |
| Wheat Ridge to Troyan | 5,922.36 mi (9,531.12 km) |
| Wheat Ridge to Tryavna | 5,946.62 mi (9,570.16 km) |
| Wheat Ridge to Tutrakan | 5,912.53 mi (9,515.30 km) |
| Wheat Ridge to Varna | 5,996.87 mi (9,651.03 km) |
