| Oeiras to Smolyan | 1,796.37 mi (2,890.97 km) |
| Oeiras to Sofia | 1,721.69 mi (2,770.79 km) |
| Oeiras to Sopot | 1,793.90 mi (2,887.01 km) |
| Oeiras to Sozopol | 1,944.84 mi (3,129.92 km) |
| Oeiras to Sredets | 1,919.81 mi (3,089.64 km) |
| Oeiras to Stamboliyski | 1,784.92 mi (2,872.54 km) |
| Oeiras to Stara Zagora | 1,840.51 mi (2,962.01 km) |
| Oeiras to Svilengrad | 1,872.31 mi (3,013.20 km) |
| Oeiras to Svishtov | 1,821.78 mi (2,931.86 km) |
| Oeiras to Targovishte | 1,884.50 mi (3,032.81 km) |
| Oeiras to Teteven | 1,768.65 mi (2,846.36 km) |
| Oeiras to Troyan | 1,791.49 mi (2,883.13 km) |
| Oeiras to Tryavna | 1,831.16 mi (2,946.98 km) |
| Oeiras to Tutrakan | 1,884.25 mi (3,032.41 km) |
| Oeiras to Varna | 1,951.65 mi (3,140.87 km) |
