| Oregon City to Smolyan | 6,100.72 mi (9,818.16 km) |
| Oregon City to Sofia | 6,002.41 mi (9,659.94 km) |
| Oregon City to Sopot | 6,033.52 mi (9,710.01 km) |
| Oregon City to Sozopol | 6,103.22 mi (9,822.18 km) |
| Oregon City to Sredets | 6,098.57 mi (9,814.71 km) |
| Oregon City to Stamboliyski | 6,062.32 mi (9,756.36 km) |
| Oregon City to Stara Zagora | 6,064.57 mi (9,759.99 km) |
| Oregon City to Svilengrad | 6,117.77 mi (9,845.60 km) |
| Oregon City to Svishtov | 5,983.04 mi (9,628.77 km) |
| Oregon City to Targovishte | 6,029.33 mi (9,703.26 km) |
| Oregon City to Teteven | 6,007.12 mi (9,667.52 km) |
| Oregon City to Troyan | 6,017.96 mi (9,684.98 km) |
| Oregon City to Tryavna | 6,033.93 mi (9,710.67 km) |
| Oregon City to Tutrakan | 5,978.37 mi (9,621.26 km) |
| Oregon City to Varna | 6,055.20 mi (9,744.91 km) |
