| Boerne to Popovo | 6,300.20 mi (10,139.20 km) |
| Boerne to Provadia | 6,351.00 mi (10,220.94 km) |
| Boerne to Radnevo | 6,340.25 mi (10,203.64 km) |
| Boerne to Radomir | 6,217.84 mi (10,006.65 km) |
| Boerne to Rakitovo | 6,286.97 mi (10,117.89 km) |
| Boerne to Rakovski | 6,305.28 mi (10,147.37 km) |
| Boerne to Razgrad | 6,301.38 mi (10,141.10 km) |
| Boerne to Razlog | 6,268.47 mi (10,088.13 km) |
| Boerne to Ruse | 6,267.30 mi (10,086.25 km) |
| Boerne to Samokov | 6,250.52 mi (10,059.24 km) |
| Boerne to Sandanski | 6,276.24 mi (10,100.64 km) |
| Boerne to Sevlievo | 6,275.44 mi (10,099.34 km) |
| Boerne to Shumen | 6,328.38 mi (10,184.55 km) |
| Boerne to Silistra | 6,298.97 mi (10,137.21 km) |
| Boerne to Sliven | 6,336.18 mi (10,197.10 km) |
