| Elk City to Smolyan | 6,051.32 mi (9,738.65 km) |
| Elk City to Sofia | 5,947.02 mi (9,570.81 km) |
| Elk City to Sopot | 5,998.70 mi (9,653.97 km) |
| Elk City to Sozopol | 6,110.34 mi (9,833.64 km) |
| Elk City to Sredets | 6,097.18 mi (9,812.47 km) |
| Elk City to Stamboliyski | 6,017.52 mi (9,684.26 km) |
| Elk City to Stara Zagora | 6,040.56 mi (9,721.35 km) |
| Elk City to Svilengrad | 6,093.71 mi (9,806.87 km) |
| Elk City to Svishtov | 5,969.68 mi (9,607.27 km) |
| Elk City to Targovishte | 6,029.77 mi (9,703.98 km) |
| Elk City to Teteven | 5,968.54 mi (9,605.44 km) |
| Elk City to Troyan | 5,985.67 mi (9,633.01 km) |
| Elk City to Tryavna | 6,013.19 mi (9,677.29 km) |
| Elk City to Tutrakan | 5,989.36 mi (9,638.94 km) |
| Elk City to Varna | 6,075.44 mi (9,777.47 km) |
