| Oak Park to Smolyan | 5,299.13 mi (8,528.13 km) |
| Oak Park to Sofia | 5,194.99 mi (8,360.53 km) |
| Oak Park to Sopot | 5,248.88 mi (8,447.26 km) |
| Oak Park to Sozopol | 5,365.31 mi (8,634.64 km) |
| Oak Park to Sredets | 5,351.05 mi (8,611.69 km) |
| Oak Park to Stamboliyski | 5,266.22 mi (8,475.17 km) |
| Oak Park to Stara Zagora | 5,291.81 mi (8,516.35 km) |
| Oak Park to Svilengrad | 5,344.45 mi (8,601.06 km) |
| Oak Park to Svishtov | 5,223.11 mi (8,405.78 km) |
| Oak Park to Targovishte | 5,284.60 mi (8,504.73 km) |
| Oak Park to Teteven | 5,218.50 mi (8,398.37 km) |
| Oak Park to Troyan | 5,236.32 mi (8,427.04 km) |
| Oak Park to Tryavna | 5,265.15 mi (8,473.44 km) |
| Oak Park to Tutrakan | 5,246.19 mi (8,442.92 km) |
| Oak Park to Varna | 5,332.75 mi (8,582.23 km) |
