| Ironton to Popovo | 5,245.60 mi (8,441.97 km) |
| Ironton to Provadia | 5,298.91 mi (8,527.78 km) |
| Ironton to Radnevo | 5,280.91 mi (8,498.81 km) |
| Ironton to Radomir | 5,152.45 mi (8,292.07 km) |
| Ironton to Rakitovo | 5,222.13 mi (8,404.21 km) |
| Ironton to Rakovski | 5,243.56 mi (8,438.69 km) |
| Ironton to Razgrad | 5,248.23 mi (8,446.22 km) |
| Ironton to Razlog | 5,201.93 mi (8,371.70 km) |
| Ironton to Ruse | 5,213.83 mi (8,390.85 km) |
| Ironton to Samokov | 5,185.73 mi (8,345.62 km) |
| Ironton to Sandanski | 5,208.25 mi (8,381.86 km) |
| Ironton to Sevlievo | 5,216.77 mi (8,395.58 km) |
| Ironton to Shumen | 5,275.35 mi (8,489.86 km) |
| Ironton to Silistra | 5,250.17 mi (8,449.34 km) |
| Ironton to Sliven | 5,279.28 mi (8,496.18 km) |
