| Longford to Devnya | 1,751.99 mi (2,819.56 km) |
| Longford to Dimitrovgrad | 1,723.19 mi (2,773.20 km) |
| Longford to Dobrich | 1,748.33 mi (2,813.66 km) |
| Longford to Dospat | 1,684.48 mi (2,710.91 km) |
| Longford to Dupnitsa | 1,615.92 mi (2,600.58 km) |
| Longford to Elhovo | 1,756.51 mi (2,826.82 km) |
| Longford to Etropole | 1,625.74 mi (2,616.37 km) |
| Longford to Gabrovo | 1,677.24 mi (2,699.26 km) |
| Longford to Gorna Oryahovitsa | 1,680.58 mi (2,704.62 km) |
| Longford to Gotse Delchev | 1,671.29 mi (2,689.68 km) |
| Longford to Harmanli | 1,740.21 mi (2,800.59 km) |
| Longford to Haskovo | 1,727.00 mi (2,779.34 km) |
| Longford to Ihtiman | 1,635.72 mi (2,632.44 km) |
| Longford to Isperih | 1,701.87 mi (2,738.90 km) |
| Longford to Kardzhali | 1,731.66 mi (2,786.83 km) |
