| Horley to Popovo | 1,341.56 mi (2,159.03 km) |
| Horley to Provadia | 1,398.49 mi (2,250.65 km) |
| Horley to Radnevo | 1,369.87 mi (2,204.59 km) |
| Horley to Radomir | 1,236.80 mi (1,990.44 km) |
| Horley to Rakitovo | 1,306.64 mi (2,102.83 km) |
| Horley to Rakovski | 1,330.25 mi (2,140.82 km) |
| Horley to Razgrad | 1,346.67 mi (2,167.26 km) |
| Horley to Razlog | 1,285.79 mi (2,069.27 km) |
| Horley to Ruse | 1,312.21 mi (2,111.79 km) |
| Horley to Samokov | 1,270.33 mi (2,044.39 km) |
| Horley to Sandanski | 1,291.88 mi (2,079.09 km) |
| Horley to Sevlievo | 1,307.00 mi (2,103.42 km) |
| Horley to Shumen | 1,373.60 mi (2,210.59 km) |
| Horley to Silistra | 1,357.12 mi (2,184.07 km) |
| Horley to Sliven | 1,371.35 mi (2,206.98 km) |
