| Bothell East to Smolyan | 5,937.29 mi (9,555.14 km) |
| Bothell East to Sofia | 5,839.45 mi (9,397.68 km) |
| Bothell East to Sopot | 5,869.70 mi (9,446.36 km) |
| Bothell East to Sozopol | 5,937.78 mi (9,555.94 km) |
| Bothell East to Sredets | 5,933.43 mi (9,548.93 km) |
| Bothell East to Stamboliyski | 5,898.80 mi (9,493.20 km) |
| Bothell East to Stara Zagora | 5,900.29 mi (9,495.60 km) |
| Bothell East to Svilengrad | 5,953.37 mi (9,581.02 km) |
| Bothell East to Svishtov | 5,818.56 mi (9,364.07 km) |
| Bothell East to Targovishte | 5,864.27 mi (9,437.63 km) |
| Bothell East to Teteven | 5,843.50 mi (9,404.21 km) |
| Bothell East to Troyan | 5,854.09 mi (9,421.24 km) |
| Bothell East to Tryavna | 5,869.59 mi (9,446.20 km) |
| Bothell East to Tutrakan | 5,813.07 mi (9,355.23 km) |
| Bothell East to Varna | 5,889.44 mi (9,478.14 km) |
