| London Colney to Popovo | 1,356.18 mi (2,182.56 km) |
| London Colney to Provadia | 1,412.48 mi (2,273.16 km) |
| London Colney to Radnevo | 1,386.29 mi (2,231.02 km) |
| London Colney to Radomir | 1,255.29 mi (2,020.20 km) |
| London Colney to Rakitovo | 1,325.00 mi (2,132.39 km) |
| London Colney to Rakovski | 1,347.45 mi (2,168.51 km) |
| London Colney to Razgrad | 1,360.80 mi (2,190.00 km) |
| London Colney to Razlog | 1,304.81 mi (2,099.89 km) |
| London Colney to Ruse | 1,326.29 mi (2,134.46 km) |
| London Colney to Samokov | 1,288.62 mi (2,073.84 km) |
| London Colney to Sandanski | 1,311.51 mi (2,110.67 km) |
| London Colney to Sevlievo | 1,322.99 mi (2,129.15 km) |
| London Colney to Shumen | 1,387.80 mi (2,233.45 km) |
| London Colney to Silistra | 1,369.78 mi (2,204.45 km) |
| London Colney to Sliven | 1,386.90 mi (2,232.01 km) |
