| Irmo to Devnya | 5,462.34 mi (8,790.79 km) |
| Irmo to Dimitrovgrad | 5,429.96 mi (8,738.67 km) |
| Irmo to Dobrich | 5,458.45 mi (8,784.52 km) |
| Irmo to Dospat | 5,386.12 mi (8,668.13 km) |
| Irmo to Dupnitsa | 5,317.64 mi (8,557.91 km) |
| Irmo to Elhovo | 5,465.12 mi (8,795.26 km) |
| Irmo to Etropole | 5,332.12 mi (8,581.21 km) |
| Irmo to Gabrovo | 5,385.87 mi (8,667.72 km) |
| Irmo to Gorna Oryahovitsa | 5,390.11 mi (8,674.55 km) |
| Irmo to Gotse Delchev | 5,371.13 mi (8,644.00 km) |
| Irmo to Harmanli | 5,447.16 mi (8,766.35 km) |
| Irmo to Haskovo | 5,433.32 mi (8,744.08 km) |
| Irmo to Ihtiman | 5,340.13 mi (8,594.12 km) |
| Irmo to Isperih | 5,412.20 mi (8,710.10 km) |
| Irmo to Kardzhali | 5,436.49 mi (8,749.18 km) |
