| Letterkenny to Devnya | 1,765.44 mi (2,841.20 km) |
| Letterkenny to Dimitrovgrad | 1,742.85 mi (2,804.84 km) |
| Letterkenny to Dobrich | 1,760.43 mi (2,833.13 km) |
| Letterkenny to Dospat | 1,707.58 mi (2,748.09 km) |
| Letterkenny to Dupnitsa | 1,639.24 mi (2,638.10 km) |
| Letterkenny to Elhovo | 1,774.29 mi (2,855.44 km) |
| Letterkenny to Etropole | 1,645.99 mi (2,648.97 km) |
| Letterkenny to Gabrovo | 1,695.18 mi (2,728.13 km) |
| Letterkenny to Gorna Oryahovitsa | 1,697.19 mi (2,731.37 km) |
| Letterkenny to Gotse Delchev | 1,695.36 mi (2,728.41 km) |
| Letterkenny to Harmanli | 1,759.67 mi (2,831.91 km) |
| Letterkenny to Haskovo | 1,747.01 mi (2,811.55 km) |
| Letterkenny to Ihtiman | 1,657.36 mi (2,667.27 km) |
| Letterkenny to Isperih | 1,715.09 mi (2,760.17 km) |
| Letterkenny to Kardzhali | 1,752.72 mi (2,820.73 km) |
