| Billingham to Popovo | 1,455.64 mi (2,342.62 km) |
| Billingham to Provadia | 1,508.35 mi (2,427.45 km) |
| Billingham to Radnevo | 1,494.00 mi (2,404.37 km) |
| Billingham to Radomir | 1,373.95 mi (2,211.16 km) |
| Billingham to Rakitovo | 1,442.42 mi (2,321.35 km) |
| Billingham to Rakovski | 1,459.22 mi (2,348.39 km) |
| Billingham to Razgrad | 1,457.84 mi (2,346.16 km) |
| Billingham to Razlog | 1,425.48 mi (2,294.09 km) |
| Billingham to Ruse | 1,423.49 mi (2,290.89 km) |
| Billingham to Samokov | 1,406.04 mi (2,262.81 km) |
| Billingham to Sandanski | 1,434.88 mi (2,309.22 km) |
| Billingham to Sevlievo | 1,429.25 mi (2,300.16 km) |
| Billingham to Shumen | 1,484.94 mi (2,389.79 km) |
| Billingham to Silistra | 1,459.70 mi (2,349.16 km) |
| Billingham to Sliven | 1,490.50 mi (2,398.73 km) |
