| Guymon to Smolyan | 6,050.08 mi (9,736.66 km) |
| Guymon to Sofia | 5,945.81 mi (9,568.85 km) |
| Guymon to Sopot | 5,995.59 mi (9,648.97 km) |
| Guymon to Sozopol | 6,103.41 mi (9,822.49 km) |
| Guymon to Sredets | 6,091.09 mi (9,802.66 km) |
| Guymon to Stamboliyski | 6,015.59 mi (9,681.16 km) |
| Guymon to Stara Zagora | 6,036.55 mi (9,714.89 km) |
| Guymon to Svilengrad | 6,090.01 mi (9,800.93 km) |
| Guymon to Svishtov | 5,964.11 mi (9,598.31 km) |
| Guymon to Targovishte | 6,023.09 mi (9,693.22 km) |
| Guymon to Teteven | 5,965.66 mi (9,600.80 km) |
| Guymon to Troyan | 5,982.22 mi (9,627.46 km) |
| Guymon to Tryavna | 6,008.67 mi (9,670.01 km) |
| Guymon to Tutrakan | 5,981.31 mi (9,625.99 km) |
| Guymon to Varna | 6,066.91 mi (9,763.75 km) |
