| Okmulgee to Smolyan | 5,917.37 mi (9,523.09 km) |
| Okmulgee to Sofia | 5,813.18 mi (9,355.41 km) |
| Okmulgee to Sopot | 5,866.62 mi (9,441.41 km) |
| Okmulgee to Sozopol | 5,981.86 mi (9,626.87 km) |
| Okmulgee to Sredets | 5,967.90 mi (9,604.40 km) |
| Okmulgee to Stamboliyski | 5,884.28 mi (9,469.83 km) |
| Okmulgee to Stara Zagora | 5,909.31 mi (9,510.12 km) |
| Okmulgee to Svilengrad | 5,962.08 mi (9,595.04 km) |
| Okmulgee to Svishtov | 5,840.04 mi (9,398.64 km) |
| Okmulgee to Targovishte | 5,901.16 mi (9,497.00 km) |
| Okmulgee to Teteven | 5,836.28 mi (9,392.59 km) |
| Okmulgee to Troyan | 5,853.95 mi (9,421.02 km) |
| Okmulgee to Tryavna | 5,882.47 mi (9,466.92 km) |
| Okmulgee to Tutrakan | 5,862.16 mi (9,434.23 km) |
| Okmulgee to Varna | 5,948.60 mi (9,573.35 km) |
