| Bourne to Popovo | 1,379.30 mi (2,219.78 km) |
| Bourne to Provadia | 1,434.30 mi (2,308.28 km) |
| Bourne to Radnevo | 1,412.76 mi (2,273.62 km) |
| Bourne to Radomir | 1,285.94 mi (2,069.52 km) |
| Bourne to Rakitovo | 1,355.28 mi (2,181.11 km) |
| Bourne to Rakovski | 1,375.48 mi (2,213.62 km) |
| Bourne to Razgrad | 1,382.98 mi (2,225.69 km) |
| Bourne to Razlog | 1,336.38 mi (2,150.69 km) |
| Bourne to Ruse | 1,348.46 mi (2,170.14 km) |
| Bourne to Samokov | 1,318.83 mi (2,122.45 km) |
| Bourne to Sandanski | 1,344.19 mi (2,163.27 km) |
| Bourne to Sevlievo | 1,348.76 mi (2,170.62 km) |
| Bourne to Shumen | 1,410.07 mi (2,269.30 km) |
| Bourne to Silistra | 1,389.18 mi (2,235.67 km) |
| Bourne to Sliven | 1,411.73 mi (2,271.96 km) |
