| Corvallis to Smolyan | 6,163.02 mi (9,918.42 km) |
| Corvallis to Sofia | 6,064.79 mi (9,760.33 km) |
| Corvallis to Sopot | 6,095.74 mi (9,810.15 km) |
| Corvallis to Sozopol | 6,165.08 mi (9,921.73 km) |
| Corvallis to Sredets | 6,160.51 mi (9,914.38 km) |
| Corvallis to Stamboliyski | 6,124.60 mi (9,856.59 km) |
| Corvallis to Stara Zagora | 6,126.71 mi (9,859.98 km) |
| Corvallis to Svilengrad | 6,179.87 mi (9,945.55 km) |
| Corvallis to Svishtov | 6,045.13 mi (9,728.69 km) |
| Corvallis to Targovishte | 6,091.28 mi (9,802.97 km) |
| Corvallis to Teteven | 6,069.38 mi (9,767.73 km) |
| Corvallis to Troyan | 6,080.18 mi (9,785.10 km) |
| Corvallis to Tryavna | 6,096.05 mi (9,810.64 km) |
| Corvallis to Tutrakan | 6,040.26 mi (9,720.86 km) |
| Corvallis to Varna | 6,116.97 mi (9,844.31 km) |
