| Frederick to Devnya | 5,055.90 mi (8,136.69 km) |
| Frederick to Dimitrovgrad | 5,027.62 mi (8,091.17 km) |
| Frederick to Dobrich | 5,051.17 mi (8,129.08 km) |
| Frederick to Dospat | 4,986.13 mi (8,024.41 km) |
| Frederick to Dupnitsa | 4,917.55 mi (7,914.03 km) |
| Frederick to Elhovo | 5,061.54 mi (8,145.76 km) |
| Frederick to Etropole | 4,929.95 mi (7,933.99 km) |
| Frederick to Gabrovo | 4,982.27 mi (8,018.18 km) |
| Frederick to Gorna Oryahovitsa | 4,985.65 mi (8,023.63 km) |
| Frederick to Gotse Delchev | 4,971.80 mi (8,001.33 km) |
| Frederick to Harmanli | 5,044.72 mi (8,118.69 km) |
| Frederick to Haskovo | 5,031.24 mi (8,096.99 km) |
| Frederick to Ihtiman | 4,938.94 mi (7,948.46 km) |
| Frederick to Isperih | 5,005.61 mi (8,055.76 km) |
| Frederick to Kardzhali | 5,035.17 mi (8,103.32 km) |
