| Caldwell to Devnya | 6,041.16 mi (9,722.31 km) |
| Caldwell to Dimitrovgrad | 6,070.48 mi (9,769.50 km) |
| Caldwell to Dobrich | 6,024.89 mi (9,696.13 km) |
| Caldwell to Dospat | 6,061.93 mi (9,755.74 km) |
| Caldwell to Dupnitsa | 5,999.34 mi (9,655.01 km) |
| Caldwell to Elhovo | 6,084.96 mi (9,792.79 km) |
| Caldwell to Etropole | 5,985.37 mi (9,632.51 km) |
| Caldwell to Gabrovo | 6,013.89 mi (9,678.43 km) |
| Caldwell to Gorna Oryahovitsa | 6,005.63 mi (9,665.12 km) |
| Caldwell to Gotse Delchev | 6,056.75 mi (9,747.41 km) |
| Caldwell to Harmanli | 6,084.52 mi (9,792.09 km) |
| Caldwell to Haskovo | 6,076.95 mi (9,779.91 km) |
| Caldwell to Ihtiman | 6,005.35 mi (9,664.68 km) |
| Caldwell to Isperih | 5,994.21 mi (9,646.76 km) |
| Caldwell to Kardzhali | 6,089.90 mi (9,800.75 km) |
