| Norridge to Smolyan | 5,296.62 mi (8,524.09 km) |
| Norridge to Sofia | 5,192.47 mi (8,356.48 km) |
| Norridge to Sopot | 5,246.30 mi (8,443.11 km) |
| Norridge to Sozopol | 5,362.61 mi (8,630.29 km) |
| Norridge to Sredets | 5,348.38 mi (8,607.39 km) |
| Norridge to Stamboliyski | 5,263.69 mi (8,471.08 km) |
| Norridge to Stara Zagora | 5,289.21 mi (8,512.16 km) |
| Norridge to Svilengrad | 5,341.86 mi (8,596.89 km) |
| Norridge to Svishtov | 5,220.44 mi (8,401.49 km) |
| Norridge to Targovishte | 5,281.90 mi (8,500.39 km) |
| Norridge to Teteven | 5,215.93 mi (8,394.22 km) |
| Norridge to Troyan | 5,233.73 mi (8,422.87 km) |
| Norridge to Tryavna | 5,262.53 mi (8,469.22 km) |
| Norridge to Tutrakan | 5,243.44 mi (8,438.50 km) |
| Norridge to Varna | 5,329.99 mi (8,577.79 km) |
