| Lubbock to Popovo | 6,196.68 mi (9,972.60 km) |
| Lubbock to Provadia | 6,244.69 mi (10,049.85 km) |
| Lubbock to Radnevo | 6,241.40 mi (10,044.56 km) |
| Lubbock to Radomir | 6,126.46 mi (9,859.59 km) |
| Lubbock to Rakitovo | 6,194.56 mi (9,969.18 km) |
| Lubbock to Rakovski | 6,209.23 mi (9,992.79 km) |
| Lubbock to Razgrad | 6,196.41 mi (9,972.16 km) |
| Lubbock to Razlog | 6,178.19 mi (9,942.83 km) |
| Lubbock to Ruse | 6,162.85 mi (9,918.15 km) |
| Lubbock to Samokov | 6,158.27 mi (9,910.77 km) |
| Lubbock to Sandanski | 6,187.68 mi (9,958.11 km) |
| Lubbock to Sevlievo | 6,176.24 mi (9,939.70 km) |
| Lubbock to Shumen | 6,223.13 mi (10,015.17 km) |
| Lubbock to Silistra | 6,189.83 mi (9,961.56 km) |
| Lubbock to Sliven | 6,234.80 mi (10,033.94 km) |
