| Orpington to Popovo | 1,333.51 mi (2,146.07 km) |
| Orpington to Provadia | 1,390.15 mi (2,237.24 km) |
| Orpington to Radnevo | 1,362.67 mi (2,193.00 km) |
| Orpington to Radomir | 1,230.61 mi (1,980.47 km) |
| Orpington to Rakitovo | 1,300.39 mi (2,092.77 km) |
| Orpington to Rakovski | 1,323.42 mi (2,129.84 km) |
| Orpington to Razgrad | 1,338.40 mi (2,153.94 km) |
| Orpington to Razlog | 1,279.87 mi (2,059.76 km) |
| Orpington to Ruse | 1,303.91 mi (2,098.44 km) |
| Orpington to Samokov | 1,264.04 mi (2,034.27 km) |
| Orpington to Sandanski | 1,286.28 mi (2,070.07 km) |
| Orpington to Sevlievo | 1,299.59 mi (2,091.48 km) |
| Orpington to Shumen | 1,365.36 mi (2,197.33 km) |
| Orpington to Silistra | 1,348.19 mi (2,169.71 km) |
| Orpington to Sliven | 1,363.74 mi (2,194.72 km) |
