| Oak Park to Popovo | 5,267.36 mi (8,476.99 km) |
| Oak Park to Provadia | 5,317.63 mi (8,557.90 km) |
| Oak Park to Radnevo | 5,308.52 mi (8,543.24 km) |
| Oak Park to Radomir | 5,188.29 mi (8,349.75 km) |
| Oak Park to Rakitovo | 5,257.12 mi (8,460.51 km) |
| Oak Park to Rakovski | 5,274.31 mi (8,488.18 km) |
| Oak Park to Razgrad | 5,268.24 mi (8,478.42 km) |
| Oak Park to Razlog | 5,239.34 mi (8,431.90 km) |
| Oak Park to Ruse | 5,234.25 mi (8,423.71 km) |
| Oak Park to Samokov | 5,220.70 mi (8,401.90 km) |
| Oak Park to Sandanski | 5,247.74 mi (8,445.42 km) |
| Oak Park to Sevlievo | 5,243.58 mi (8,438.73 km) |
| Oak Park to Shumen | 5,295.20 mi (8,521.81 km) |
| Oak Park to Silistra | 5,265.12 mi (8,473.39 km) |
| Oak Park to Sliven | 5,303.83 mi (8,535.68 km) |
