| Welby to Devnya | 5,979.07 mi (9,622.39 km) |
| Welby to Dimitrovgrad | 5,987.44 mi (9,635.86 km) |
| Welby to Dobrich | 5,966.70 mi (9,602.48 km) |
| Welby to Dospat | 5,966.18 mi (9,601.64 km) |
| Welby to Dupnitsa | 5,899.84 mi (9,494.87 km) |
| Welby to Elhovo | 6,009.61 mi (9,671.53 km) |
| Welby to Etropole | 5,895.54 mi (9,487.96 km) |
| Welby to Gabrovo | 5,933.74 mi (9,549.44 km) |
| Welby to Gorna Oryahovitsa | 5,929.66 mi (9,542.87 km) |
| Welby to Gotse Delchev | 5,957.38 mi (9,587.48 km) |
| Welby to Harmanli | 6,002.97 mi (9,660.85 km) |
| Welby to Haskovo | 5,992.99 mi (9,644.78 km) |
| Welby to Ihtiman | 5,911.84 mi (9,514.18 km) |
| Welby to Isperih | 5,929.72 mi (9,542.96 km) |
| Welby to Kardzhali | 6,002.82 mi (9,660.61 km) |
