| Oregon to Smolyan | 5,147.71 mi (8,284.44 km) |
| Oregon to Sofia | 5,043.92 mi (8,117.40 km) |
| Oregon to Sopot | 5,099.87 mi (8,207.45 km) |
| Oregon to Sozopol | 5,220.46 mi (8,401.53 km) |
| Oregon to Sredets | 5,205.25 mi (8,377.04 km) |
| Oregon to Stamboliyski | 5,115.74 mi (8,232.99 km) |
| Oregon to Stara Zagora | 5,143.73 mi (8,278.03 km) |
| Oregon to Svilengrad | 5,195.78 mi (8,361.80 km) |
| Oregon to Svishtov | 5,077.18 mi (8,170.93 km) |
| Oregon to Targovishte | 5,139.79 mi (8,271.69 km) |
| Oregon to Teteven | 5,069.34 mi (8,158.31 km) |
| Oregon to Troyan | 5,087.77 mi (8,187.98 km) |
| Oregon to Tryavna | 5,117.79 mi (8,236.29 km) |
| Oregon to Tutrakan | 5,103.22 mi (8,212.83 km) |
| Oregon to Varna | 5,190.00 mi (8,352.50 km) |
