| Silver Spring to Karlovo | 4,974.03 mi (8,004.94 km) |
| Silver Spring to Karnobat | 5,062.25 mi (8,146.90 km) |
| Silver Spring to Kavarna | 5,081.44 mi (8,177.79 km) |
| Silver Spring to Kazanlak | 4,999.21 mi (8,045.44 km) |
| Silver Spring to Knezha | 4,909.43 mi (7,900.97 km) |
| Silver Spring to Kostinbrod | 4,901.99 mi (7,889.00 km) |
| Silver Spring to Kozloduy | 4,883.76 mi (7,859.65 km) |
| Silver Spring to Kyustendil | 4,901.63 mi (7,888.42 km) |
| Silver Spring to Levski | 4,957.23 mi (7,977.89 km) |
| Silver Spring to Lom | 4,862.01 mi (7,824.64 km) |
| Silver Spring to Lovech | 4,950.06 mi (7,966.35 km) |
| Silver Spring to Lukovit | 4,925.09 mi (7,926.16 km) |
| Silver Spring to Lyaskovets | 4,991.77 mi (8,033.48 km) |
| Silver Spring to Mezdra | 4,908.18 mi (7,898.95 km) |
| Silver Spring to Momchilgrad | 5,045.30 mi (8,119.63 km) |
