| Flower Mound to Popovo | 6,063.60 mi (9,758.43 km) |
| Flower Mound to Provadia | 6,113.89 mi (9,839.35 km) |
| Flower Mound to Radnevo | 6,104.61 mi (9,824.41 km) |
| Flower Mound to Radomir | 5,983.74 mi (9,629.90 km) |
| Flower Mound to Rakitovo | 6,052.67 mi (9,740.84 km) |
| Flower Mound to Rakovski | 6,070.21 mi (9,769.05 km) |
| Flower Mound to Razgrad | 6,064.50 mi (9,759.88 km) |
| Flower Mound to Razlog | 6,034.64 mi (9,711.82 km) |
| Flower Mound to Ruse | 6,030.51 mi (9,705.17 km) |
| Flower Mound to Samokov | 6,016.24 mi (9,682.21 km) |
| Flower Mound to Sandanski | 6,042.81 mi (9,724.96 km) |
| Flower Mound to Sevlievo | 6,039.69 mi (9,719.94 km) |
| Flower Mound to Shumen | 6,091.46 mi (9,803.26 km) |
| Flower Mound to Silistra | 6,061.31 mi (9,754.73 km) |
| Flower Mound to Sliven | 6,100.02 mi (9,817.04 km) |
