| Elk River to Popovo | 5,282.82 mi (8,501.88 km) |
| Elk River to Provadia | 5,329.44 mi (8,576.90 km) |
| Elk River to Radnevo | 5,329.77 mi (8,577.44 km) |
| Elk River to Radomir | 5,219.30 mi (8,399.65 km) |
| Elk River to Rakitovo | 5,286.60 mi (8,507.96 km) |
| Elk River to Rakovski | 5,299.17 mi (8,528.20 km) |
| Elk River to Razgrad | 5,281.86 mi (8,500.34 km) |
| Elk River to Razlog | 5,271.53 mi (8,483.71 km) |
| Elk River to Ruse | 5,248.62 mi (8,446.83 km) |
| Elk River to Samokov | 5,250.49 mi (8,449.85 km) |
| Elk River to Sandanski | 5,282.04 mi (8,500.63 km) |
| Elk River to Sevlievo | 5,264.59 mi (8,472.53 km) |
| Elk River to Shumen | 5,308.41 mi (8,543.06 km) |
| Elk River to Silistra | 5,273.44 mi (8,486.79 km) |
| Elk River to Sliven | 5,321.90 mi (8,564.76 km) |
