| Riviera Beach to Smolyan | 5,707.19 mi (9,184.84 km) |
| Riviera Beach to Sofia | 5,608.40 mi (9,025.86 km) |
| Riviera Beach to Sopot | 5,673.20 mi (9,130.13 km) |
| Riviera Beach to Sozopol | 5,810.96 mi (9,351.84 km) |
| Riviera Beach to Sredets | 5,791.50 mi (9,320.52 km) |
| Riviera Beach to Stamboliyski | 5,681.06 mi (9,142.79 km) |
| Riviera Beach to Stara Zagora | 5,720.42 mi (9,206.12 km) |
| Riviera Beach to Svilengrad | 5,767.95 mi (9,282.62 km) |
| Riviera Beach to Svishtov | 5,666.61 mi (9,119.52 km) |
| Riviera Beach to Targovishte | 5,732.85 mi (9,226.13 km) |
| Riviera Beach to Teteven | 5,642.81 mi (9,081.23 km) |
| Riviera Beach to Troyan | 5,663.82 mi (9,115.04 km) |
| Riviera Beach to Tryavna | 5,698.87 mi (9,171.44 km) |
| Riviera Beach to Tutrakan | 5,706.28 mi (9,183.36 km) |
| Riviera Beach to Varna | 5,791.62 mi (9,320.71 km) |
