| Northbrook to Smolyan | 5,289.02 mi (8,511.85 km) |
| Northbrook to Sofia | 5,184.85 mi (8,344.21 km) |
| Northbrook to Sopot | 5,238.58 mi (8,430.67 km) |
| Northbrook to Sozopol | 5,354.67 mi (8,617.52 km) |
| Northbrook to Sredets | 5,340.49 mi (8,594.69 km) |
| Northbrook to Stamboliyski | 5,256.03 mi (8,458.76 km) |
| Northbrook to Stara Zagora | 5,281.43 mi (8,499.64 km) |
| Northbrook to Svilengrad | 5,334.11 mi (8,584.42 km) |
| Northbrook to Svishtov | 5,212.56 mi (8,388.81 km) |
| Northbrook to Targovishte | 5,273.96 mi (8,487.62 km) |
| Northbrook to Teteven | 5,208.21 mi (8,381.80 km) |
| Northbrook to Troyan | 5,225.98 mi (8,410.40 km) |
| Northbrook to Tryavna | 5,254.72 mi (8,456.65 km) |
| Northbrook to Tutrakan | 5,235.42 mi (8,425.59 km) |
| Northbrook to Varna | 5,321.96 mi (8,564.86 km) |
