| Irmo to Popovo | 5,403.00 mi (8,695.30 km) |
| Irmo to Provadia | 5,458.36 mi (8,784.38 km) |
| Irmo to Radnevo | 5,433.57 mi (8,744.48 km) |
| Irmo to Radomir | 5,299.41 mi (8,528.57 km) |
| Irmo to Rakitovo | 5,369.33 mi (8,641.11 km) |
| Irmo to Rakovski | 5,393.97 mi (8,680.76 km) |
| Irmo to Razgrad | 5,406.98 mi (8,701.69 km) |
| Irmo to Razlog | 5,347.33 mi (8,605.70 km) |
| Irmo to Ruse | 5,372.46 mi (8,646.14 km) |
| Irmo to Samokov | 5,333.17 mi (8,582.90 km) |
| Irmo to Sandanski | 5,351.96 mi (8,613.14 km) |
| Irmo to Sevlievo | 5,370.43 mi (8,642.87 km) |
| Irmo to Shumen | 5,434.06 mi (8,745.28 km) |
| Irmo to Silistra | 5,412.79 mi (8,711.04 km) |
| Irmo to Sliven | 5,434.33 mi (8,745.71 km) |
