| Staines-upon-Thames to Smolyan | 1,368.54 mi (2,202.45 km) |
| Staines-upon-Thames to Sofia | 1,265.87 mi (2,037.22 km) |
| Staines-upon-Thames to Sopot | 1,326.02 mi (2,134.03 km) |
| Staines-upon-Thames to Sozopol | 1,457.69 mi (2,345.92 km) |
| Staines-upon-Thames to Sredets | 1,439.50 mi (2,316.65 km) |
| Staines-upon-Thames to Stamboliyski | 1,338.45 mi (2,154.03 km) |
| Staines-upon-Thames to Stara Zagora | 1,371.89 mi (2,207.85 km) |
| Staines-upon-Thames to Svilengrad | 1,421.98 mi (2,288.45 km) |
| Staines-upon-Thames to Svishtov | 1,312.90 mi (2,112.91 km) |
| Staines-upon-Thames to Targovishte | 1,378.48 mi (2,218.45 km) |
| Staines-upon-Thames to Teteven | 1,295.37 mi (2,084.69 km) |
| Staines-upon-Thames to Troyan | 1,315.24 mi (2,116.68 km) |
| Staines-upon-Thames to Tryavna | 1,348.28 mi (2,169.85 km) |
| Staines-upon-Thames to Tutrakan | 1,349.99 mi (2,172.60 km) |
| Staines-upon-Thames to Varna | 1,435.76 mi (2,310.63 km) |
