| Galveston to Popovo | 6,188.93 mi (9,960.13 km) |
| Galveston to Provadia | 6,241.46 mi (10,044.66 km) |
| Galveston to Radnevo | 6,225.70 mi (10,019.30 km) |
| Galveston to Radomir | 6,098.75 mi (9,815.00 km) |
| Galveston to Rakitovo | 6,168.33 mi (9,926.97 km) |
| Galveston to Rakovski | 6,188.98 mi (9,960.21 km) |
| Galveston to Razgrad | 6,191.10 mi (9,963.61 km) |
| Galveston to Razlog | 6,148.51 mi (9,895.07 km) |
| Galveston to Ruse | 6,156.78 mi (9,908.38 km) |
| Galveston to Samokov | 6,131.90 mi (9,868.34 km) |
| Galveston to Sandanski | 6,155.13 mi (9,905.73 km) |
| Galveston to Sevlievo | 6,161.33 mi (9,915.71 km) |
| Galveston to Shumen | 6,218.20 mi (10,007.22 km) |
| Galveston to Silistra | 6,191.54 mi (9,964.33 km) |
| Galveston to Sliven | 6,223.35 mi (10,015.52 km) |
