| Cedar Falls to Smolyan | 5,433.56 mi (8,744.47 km) |
| Cedar Falls to Sofia | 5,329.26 mi (8,576.61 km) |
| Cedar Falls to Sopot | 5,380.54 mi (8,659.14 km) |
| Cedar Falls to Sozopol | 5,491.70 mi (8,838.03 km) |
| Cedar Falls to Sredets | 5,478.61 mi (8,816.97 km) |
| Cedar Falls to Stamboliyski | 5,399.60 mi (8,689.82 km) |
| Cedar Falls to Stara Zagora | 5,422.25 mi (8,726.28 km) |
| Cedar Falls to Svilengrad | 5,475.45 mi (8,811.89 km) |
| Cedar Falls to Svishtov | 5,351.15 mi (8,611.85 km) |
| Cedar Falls to Targovishte | 5,411.15 mi (8,708.40 km) |
| Cedar Falls to Teteven | 5,350.42 mi (8,610.67 km) |
| Cedar Falls to Troyan | 5,367.45 mi (8,638.08 km) |
| Cedar Falls to Tryavna | 5,394.80 mi (8,682.09 km) |
| Cedar Falls to Tutrakan | 5,370.65 mi (8,643.23 km) |
| Cedar Falls to Varna | 5,456.72 mi (8,781.74 km) |
