| Cayey to Smolyan | 5,438.81 mi (8,752.93 km) |
| Cayey to Sofia | 5,352.31 mi (8,613.70 km) |
| Cayey to Sopot | 5,423.22 mi (8,727.82 km) |
| Cayey to Sozopol | 5,572.42 mi (8,967.95 km) |
| Cayey to Sredets | 5,549.14 mi (8,930.48 km) |
| Cayey to Stamboliyski | 5,421.18 mi (8,724.55 km) |
| Cayey to Stara Zagora | 5,471.32 mi (8,805.23 km) |
| Cayey to Svilengrad | 5,510.45 mi (8,868.21 km) |
| Cayey to Svishtov | 5,436.14 mi (8,748.63 km) |
| Cayey to Targovishte | 5,502.43 mi (8,855.31 km) |
| Cayey to Teteven | 5,394.99 mi (8,682.40 km) |
| Cayey to Troyan | 5,417.66 mi (8,718.87 km) |
| Cayey to Tryavna | 5,456.37 mi (8,781.18 km) |
| Cayey to Tutrakan | 5,489.62 mi (8,834.69 km) |
| Cayey to Varna | 5,567.69 mi (8,960.34 km) |
