| Killeen to Popovo | 6,193.14 mi (9,966.89 km) |
| Killeen to Provadia | 6,243.88 mi (10,048.56 km) |
| Killeen to Radnevo | 6,233.29 mi (10,031.51 km) |
| Killeen to Radomir | 6,111.08 mi (9,834.84 km) |
| Killeen to Rakitovo | 6,180.18 mi (9,946.04 km) |
| Killeen to Rakovski | 6,198.39 mi (9,975.34 km) |
| Killeen to Razgrad | 6,194.29 mi (9,968.75 km) |
| Killeen to Razlog | 6,161.76 mi (9,916.39 km) |
| Killeen to Ruse | 6,160.22 mi (9,913.91 km) |
| Killeen to Samokov | 6,143.74 mi (9,887.39 km) |
| Killeen to Sandanski | 6,169.59 mi (9,928.99 km) |
| Killeen to Sevlievo | 6,168.46 mi (9,927.18 km) |
| Killeen to Shumen | 6,221.29 mi (10,012.19 km) |
| Killeen to Silistra | 6,191.81 mi (9,964.76 km) |
| Killeen to Sliven | 6,229.16 mi (10,024.87 km) |
