| Okmulgee to Popovo | 5,884.03 mi (9,469.43 km) |
| Okmulgee to Provadia | 5,933.79 mi (9,549.50 km) |
| Okmulgee to Radnevo | 5,925.98 mi (9,536.94 km) |
| Okmulgee to Radomir | 5,806.65 mi (9,344.90 km) |
| Okmulgee to Rakitovo | 5,875.38 mi (9,455.50 km) |
| Okmulgee to Rakovski | 5,892.14 mi (9,482.49 km) |
| Okmulgee to Razgrad | 5,884.65 mi (9,470.43 km) |
| Okmulgee to Razlog | 5,857.80 mi (9,427.22 km) |
| Okmulgee to Ruse | 5,850.75 mi (9,415.87 km) |
| Okmulgee to Samokov | 5,838.97 mi (9,396.91 km) |
| Okmulgee to Sandanski | 5,866.35 mi (9,440.97 km) |
| Okmulgee to Sevlievo | 5,860.98 mi (9,432.33 km) |
| Okmulgee to Shumen | 5,911.56 mi (9,513.74 km) |
| Okmulgee to Silistra | 5,880.66 mi (9,464.01 km) |
| Okmulgee to Sliven | 5,920.88 mi (9,528.74 km) |
