| Wellingborough to Popovo | 1,382.78 mi (2,225.37 km) |
| Wellingborough to Provadia | 1,438.45 mi (2,314.96 km) |
| Wellingborough to Radnevo | 1,414.51 mi (2,276.44 km) |
| Wellingborough to Radomir | 1,285.44 mi (2,068.72 km) |
| Wellingborough to Rakitovo | 1,355.00 mi (2,180.67 km) |
| Wellingborough to Rakovski | 1,376.40 mi (2,215.11 km) |
| Wellingborough to Razgrad | 1,386.93 mi (2,232.06 km) |
| Wellingborough to Razlog | 1,335.40 mi (2,149.12 km) |
| Wellingborough to Ruse | 1,352.41 mi (2,176.50 km) |
| Wellingborough to Samokov | 1,318.58 mi (2,122.05 km) |
| Wellingborough to Sandanski | 1,342.61 mi (2,160.73 km) |
| Wellingborough to Sevlievo | 1,350.86 mi (2,174.00 km) |
| Wellingborough to Shumen | 1,413.99 mi (2,275.60 km) |
| Wellingborough to Silistra | 1,394.54 mi (2,244.30 km) |
| Wellingborough to Sliven | 1,414.34 mi (2,276.16 km) |
