| Holladay to Smolyan | 6,136.42 mi (9,875.61 km) |
| Holladay to Sofia | 6,033.82 mi (9,710.49 km) |
| Holladay to Sopot | 6,074.89 mi (9,776.59 km) |
| Holladay to Sozopol | 6,164.96 mi (9,921.55 km) |
| Holladay to Sredets | 6,156.34 mi (9,907.67 km) |
| Holladay to Stamboliyski | 6,099.54 mi (9,816.26 km) |
| Holladay to Stara Zagora | 6,111.41 mi (9,835.36 km) |
| Holladay to Svilengrad | 6,165.40 mi (9,922.26 km) |
| Holladay to Svishtov | 6,033.50 mi (9,709.98 km) |
| Holladay to Targovishte | 6,086.86 mi (9,795.85 km) |
| Holladay to Teteven | 6,046.35 mi (9,730.66 km) |
| Holladay to Troyan | 6,060.26 mi (9,753.04 km) |
| Holladay to Tryavna | 6,081.79 mi (9,787.69 km) |
| Holladay to Tutrakan | 6,039.95 mi (9,720.36 km) |
| Holladay to Varna | 6,122.22 mi (9,852.76 km) |
