| Whittlesey to Smolyan | 1,382.09 mi (2,224.26 km) |
| Whittlesey to Sofia | 1,278.50 mi (2,057.54 km) |
| Whittlesey to Sopot | 1,336.08 mi (2,150.22 km) |
| Whittlesey to Sozopol | 1,463.25 mi (2,354.87 km) |
| Whittlesey to Sredets | 1,446.12 mi (2,327.31 km) |
| Whittlesey to Stamboliyski | 1,350.60 mi (2,173.58 km) |
| Whittlesey to Stara Zagora | 1,381.00 mi (2,222.50 km) |
| Whittlesey to Svilengrad | 1,432.16 mi (2,304.84 km) |
| Whittlesey to Svishtov | 1,318.61 mi (2,122.09 km) |
| Whittlesey to Targovishte | 1,383.29 mi (2,226.19 km) |
| Whittlesey to Teteven | 1,305.45 mi (2,100.91 km) |
| Whittlesey to Troyan | 1,324.59 mi (2,131.72 km) |
| Whittlesey to Tryavna | 1,356.25 mi (2,182.68 km) |
| Whittlesey to Tutrakan | 1,352.04 mi (2,175.90 km) |
| Whittlesey to Varna | 1,438.45 mi (2,314.97 km) |
