| Isabela to Devnya | 5,574.33 mi (8,971.02 km) |
| Isabela to Dimitrovgrad | 5,500.71 mi (8,852.54 km) |
| Isabela to Dobrich | 5,580.19 mi (8,980.45 km) |
| Isabela to Dospat | 5,436.76 mi (8,749.63 km) |
| Isabela to Dupnitsa | 5,374.04 mi (8,648.68 km) |
| Isabela to Elhovo | 5,546.16 mi (8,925.67 km) |
| Isabela to Etropole | 5,407.89 mi (8,703.16 km) |
| Isabela to Gabrovo | 5,472.57 mi (8,807.26 km) |
| Isabela to Gorna Oryahovitsa | 5,485.55 mi (8,828.14 km) |
| Isabela to Gotse Delchev | 5,416.56 mi (8,717.11 km) |
| Isabela to Harmanli | 5,517.72 mi (8,879.92 km) |
| Isabela to Haskovo | 5,501.23 mi (8,853.38 km) |
| Isabela to Ihtiman | 5,405.66 mi (8,699.57 km) |
| Isabela to Isperih | 5,529.30 mi (8,898.55 km) |
| Isabela to Kardzhali | 5,496.56 mi (8,845.86 km) |
