| Friendswood to Devnya | 6,241.87 mi (10,045.31 km) |
| Friendswood to Dimitrovgrad | 6,222.15 mi (10,013.58 km) |
| Friendswood to Dobrich | 6,235.14 mi (10,034.48 km) |
| Friendswood to Dospat | 6,184.78 mi (9,953.45 km) |
| Friendswood to Dupnitsa | 6,116.23 mi (9,843.12 km) |
| Friendswood to Elhovo | 6,253.61 mi (10,064.22 km) |
| Friendswood to Etropole | 6,125.10 mi (9,857.39 km) |
| Friendswood to Gabrovo | 6,174.56 mi (9,936.99 km) |
| Friendswood to Gorna Oryahovitsa | 6,176.20 mi (9,939.64 km) |
| Friendswood to Gotse Delchev | 6,171.51 mi (9,932.08 km) |
| Friendswood to Harmanli | 6,239.01 mi (10,040.72 km) |
| Friendswood to Haskovo | 6,226.23 mi (10,020.14 km) |
| Friendswood to Ihtiman | 6,135.76 mi (9,874.55 km) |
| Friendswood to Isperih | 6,191.41 mi (9,964.11 km) |
| Friendswood to Kardzhali | 6,231.49 mi (10,028.62 km) |
