| Darlington to Popovo | 1,464.21 mi (2,356.42 km) |
| Darlington to Provadia | 1,517.12 mi (2,441.58 km) |
| Darlington to Radnevo | 1,502.16 mi (2,417.49 km) |
| Darlington to Radomir | 1,381.43 mi (2,223.20 km) |
| Darlington to Rakitovo | 1,450.00 mi (2,333.56 km) |
| Darlington to Rakovski | 1,467.14 mi (2,361.13 km) |
| Darlington to Razgrad | 1,466.54 mi (2,360.16 km) |
| Darlington to Razlog | 1,432.86 mi (2,305.97 km) |
| Darlington to Ruse | 1,432.17 mi (2,304.85 km) |
| Darlington to Samokov | 1,413.61 mi (2,274.99 km) |
| Darlington to Sandanski | 1,442.11 mi (2,320.85 km) |
| Darlington to Sevlievo | 1,437.46 mi (2,313.37 km) |
| Darlington to Shumen | 1,493.65 mi (2,403.79 km) |
| Darlington to Silistra | 1,468.74 mi (2,363.71 km) |
| Darlington to Sliven | 1,498.87 mi (2,412.20 km) |
