| Campbell to Smolyan | 6,595.69 mi (10,614.74 km) |
| Campbell to Sofia | 6,495.31 mi (10,453.19 km) |
| Campbell to Sopot | 6,530.59 mi (10,509.97 km) |
| Campbell to Sozopol | 6,608.46 mi (10,635.29 km) |
| Campbell to Sredets | 6,602.29 mi (10,625.35 km) |
| Campbell to Stamboliyski | 6,557.79 mi (10,553.75 km) |
| Campbell to Stara Zagora | 6,563.92 mi (10,563.62 km) |
| Campbell to Svilengrad | 6,617.60 mi (10,650.00 km) |
| Campbell to Svishtov | 6,483.57 mi (10,434.30 km) |
| Campbell to Targovishte | 6,532.74 mi (10,513.43 km) |
| Campbell to Teteven | 6,503.24 mi (10,465.96 km) |
| Campbell to Troyan | 6,515.36 mi (10,485.46 km) |
| Campbell to Tryavna | 6,533.59 mi (10,514.80 km) |
| Campbell to Tutrakan | 6,483.18 mi (10,433.67 km) |
| Campbell to Varna | 6,562.28 mi (10,560.97 km) |
