| Harlow to Popovo | 1,339.46 mi (2,155.65 km) |
| Harlow to Provadia | 1,395.61 mi (2,246.01 km) |
| Harlow to Radnevo | 1,370.01 mi (2,204.82 km) |
| Harlow to Radomir | 1,239.61 mi (1,994.96 km) |
| Harlow to Rakitovo | 1,309.27 mi (2,107.07 km) |
| Harlow to Rakovski | 1,331.38 mi (2,142.66 km) |
| Harlow to Razgrad | 1,343.96 mi (2,162.90 km) |
| Harlow to Razlog | 1,289.28 mi (2,074.90 km) |
| Harlow to Ruse | 1,309.45 mi (2,107.36 km) |
| Harlow to Samokov | 1,272.88 mi (2,048.49 km) |
| Harlow to Sandanski | 1,296.17 mi (2,085.98 km) |
| Harlow to Sevlievo | 1,306.60 mi (2,102.78 km) |
| Harlow to Shumen | 1,370.98 mi (2,206.38 km) |
| Harlow to Silistra | 1,352.63 mi (2,176.85 km) |
| Harlow to Sliven | 1,370.40 mi (2,205.45 km) |
