| Oskaloosa to Popovo | 5,465.02 mi (8,795.09 km) |
| Oskaloosa to Provadia | 5,513.78 mi (8,873.58 km) |
| Oskaloosa to Radnevo | 5,508.66 mi (8,865.33 km) |
| Oskaloosa to Radomir | 5,392.30 mi (8,678.07 km) |
| Oskaloosa to Rakitovo | 5,460.59 mi (8,787.96 km) |
| Oskaloosa to Rakovski | 5,475.91 mi (8,812.62 km) |
| Oskaloosa to Razgrad | 5,465.12 mi (8,795.26 km) |
| Oskaloosa to Razlog | 5,443.88 mi (8,761.08 km) |
| Oskaloosa to Ruse | 5,431.40 mi (8,741.00 km) |
| Oskaloosa to Samokov | 5,424.25 mi (8,729.49 km) |
| Oskaloosa to Sandanski | 5,453.14 mi (8,775.98 km) |
| Oskaloosa to Sevlievo | 5,443.55 mi (8,760.54 km) |
| Oskaloosa to Shumen | 5,491.93 mi (8,838.41 km) |
| Oskaloosa to Silistra | 5,459.71 mi (8,786.55 km) |
| Oskaloosa to Sliven | 5,502.63 mi (8,855.63 km) |
