| Green River to Smolyan | 6,021.90 mi (9,691.31 km) |
| Green River to Sofia | 5,918.97 mi (9,525.67 km) |
| Green River to Sopot | 5,961.14 mi (9,593.53 km) |
| Green River to Sozopol | 6,053.53 mi (9,742.21 km) |
| Green River to Sredets | 6,044.43 mi (9,727.56 km) |
| Green River to Stamboliyski | 5,985.26 mi (9,632.35 km) |
| Green River to Stara Zagora | 5,998.25 mi (9,653.24 km) |
| Green River to Svilengrad | 6,052.25 mi (9,740.15 km) |
| Green River to Svishtov | 5,920.91 mi (9,528.78 km) |
| Green River to Targovishte | 5,975.04 mi (9,615.89 km) |
| Green River to Teteven | 5,932.39 mi (9,547.27 km) |
| Green River to Troyan | 5,946.64 mi (9,570.20 km) |
| Green River to Tryavna | 5,968.80 mi (9,605.86 km) |
| Green River to Tutrakan | 5,928.72 mi (9,541.35 km) |
| Green River to Varna | 6,011.52 mi (9,674.61 km) |
