| Hilo to Smolyan | 8,203.32 mi (13,201.96 km) |
| Hilo to Sofia | 8,125.00 mi (13,075.92 km) |
| Hilo to Sopot | 8,129.62 mi (13,083.36 km) |
| Hilo to Sozopol | 8,142.08 mi (13,103.40 km) |
| Hilo to Sredets | 8,147.88 mi (13,112.75 km) |
| Hilo to Stamboliyski | 8,165.27 mi (13,140.73 km) |
| Hilo to Stara Zagora | 8,144.35 mi (13,107.07 km) |
| Hilo to Svilengrad | 8,189.87 mi (13,180.32 km) |
| Hilo to Svishtov | 8,062.76 mi (12,975.75 km) |
| Hilo to Targovishte | 8,086.89 mi (13,014.58 km) |
| Hilo to Teteven | 8,111.01 mi (13,053.41 km) |
| Hilo to Troyan | 8,113.50 mi (13,057.41 km) |
| Hilo to Tryavna | 8,114.49 mi (13,059.01 km) |
| Hilo to Tutrakan | 8,031.59 mi (12,925.59 km) |
| Hilo to Varna | 8,086.29 mi (13,013.63 km) |
