| Romeoville to Popovo | 5,291.15 mi (8,515.28 km) |
| Romeoville to Provadia | 5,341.43 mi (8,596.20 km) |
| Romeoville to Radnevo | 5,332.31 mi (8,581.52 km) |
| Romeoville to Radomir | 5,212.05 mi (8,387.99 km) |
| Romeoville to Rakitovo | 5,280.88 mi (8,498.76 km) |
| Romeoville to Rakovski | 5,298.09 mi (8,526.44 km) |
| Romeoville to Razgrad | 5,292.04 mi (8,516.72 km) |
| Romeoville to Razlog | 5,263.09 mi (8,470.13 km) |
| Romeoville to Ruse | 5,258.05 mi (8,462.01 km) |
| Romeoville to Samokov | 5,244.46 mi (8,440.14 km) |
| Romeoville to Sandanski | 5,271.48 mi (8,483.63 km) |
| Romeoville to Sevlievo | 5,267.37 mi (8,477.01 km) |
| Romeoville to Shumen | 5,319.00 mi (8,560.10 km) |
| Romeoville to Silistra | 5,288.92 mi (8,511.69 km) |
| Romeoville to Sliven | 5,327.62 mi (8,573.97 km) |
