| Hillsboro to Devnya | 6,043.13 mi (9,725.48 km) |
| Hillsboro to Dimitrovgrad | 6,082.92 mi (9,789.51 km) |
| Hillsboro to Dobrich | 6,025.03 mi (9,696.34 km) |
| Hillsboro to Dospat | 6,081.01 mi (9,786.45 km) |
| Hillsboro to Dupnitsa | 6,021.02 mi (9,689.89 km) |
| Hillsboro to Elhovo | 6,093.27 mi (9,806.18 km) |
| Hillsboro to Etropole | 6,002.19 mi (9,659.60 km) |
| Hillsboro to Gabrovo | 6,025.44 mi (9,697.01 km) |
| Hillsboro to Gorna Oryahovitsa | 6,015.10 mi (9,680.37 km) |
| Hillsboro to Gotse Delchev | 6,077.76 mi (9,781.20 km) |
| Hillsboro to Harmanli | 6,096.04 mi (9,810.62 km) |
| Hillsboro to Haskovo | 6,089.79 mi (9,800.58 km) |
| Hillsboro to Ihtiman | 6,023.87 mi (9,694.49 km) |
| Hillsboro to Isperih | 5,997.91 mi (9,652.71 km) |
| Hillsboro to Kardzhali | 6,104.22 mi (9,823.79 km) |
