| Parkersburg to Smolyan | 5,185.11 mi (8,344.62 km) |
| Parkersburg to Sofia | 5,081.95 mi (8,178.61 km) |
| Parkersburg to Sopot | 5,140.10 mi (8,272.19 km) |
| Parkersburg to Sozopol | 5,265.02 mi (8,473.23 km) |
| Parkersburg to Sredets | 5,248.80 mi (8,447.12 km) |
| Parkersburg to Stamboliyski | 5,154.28 mi (8,295.01 km) |
| Parkersburg to Stara Zagora | 5,184.89 mi (8,344.28 km) |
| Parkersburg to Svilengrad | 5,236.18 mi (8,426.81 km) |
| Parkersburg to Svishtov | 5,120.88 mi (8,241.27 km) |
| Parkersburg to Targovishte | 5,184.57 mi (8,343.76 km) |
| Parkersburg to Teteven | 5,109.47 mi (8,222.89 km) |
| Parkersburg to Troyan | 5,128.55 mi (8,253.61 km) |
| Parkersburg to Tryavna | 5,159.81 mi (8,303.92 km) |
| Parkersburg to Tutrakan | 5,150.08 mi (8,288.25 km) |
| Parkersburg to Varna | 5,236.91 mi (8,427.99 km) |
