| Rio Grande City to Devnya | 6,547.58 mi (10,537.32 km) |
| Rio Grande City to Dimitrovgrad | 6,529.21 mi (10,507.76 km) |
| Rio Grande City to Dobrich | 6,540.53 mi (10,525.97 km) |
| Rio Grande City to Dospat | 6,492.45 mi (10,448.59 km) |
| Rio Grande City to Dupnitsa | 6,423.92 mi (10,338.29 km) |
| Rio Grande City to Elhovo | 6,560.30 mi (10,557.78 km) |
| Rio Grande City to Etropole | 6,432.28 mi (10,351.76 km) |
| Rio Grande City to Gabrovo | 6,481.30 mi (10,430.65 km) |
| Rio Grande City to Gorna Oryahovitsa | 6,482.68 mi (10,432.86 km) |
| Rio Grande City to Gotse Delchev | 6,479.32 mi (10,427.46 km) |
| Rio Grande City to Harmanli | 6,546.04 mi (10,534.83 km) |
| Rio Grande City to Haskovo | 6,533.36 mi (10,514.42 km) |
| Rio Grande City to Ihtiman | 6,443.18 mi (10,369.30 km) |
| Rio Grande City to Isperih | 6,497.12 mi (10,456.11 km) |
| Rio Grande City to Kardzhali | 6,538.82 mi (10,523.21 km) |
