| Sittingbourne to Popovo | 1,306.13 mi (2,102.02 km) |
| Sittingbourne to Provadia | 1,362.70 mi (2,193.06 km) |
| Sittingbourne to Radnevo | 1,335.58 mi (2,149.40 km) |
| Sittingbourne to Radomir | 1,203.95 mi (1,937.57 km) |
| Sittingbourne to Rakitovo | 1,273.70 mi (2,049.82 km) |
| Sittingbourne to Rakovski | 1,296.48 mi (2,086.48 km) |
| Sittingbourne to Razgrad | 1,310.96 mi (2,109.79 km) |
| Sittingbourne to Razlog | 1,253.34 mi (2,017.06 km) |
| Sittingbourne to Ruse | 1,276.47 mi (2,054.27 km) |
| Sittingbourne to Samokov | 1,237.33 mi (1,991.29 km) |
| Sittingbourne to Sandanski | 1,259.90 mi (2,027.62 km) |
| Sittingbourne to Sevlievo | 1,272.42 mi (2,047.76 km) |
| Sittingbourne to Shumen | 1,337.93 mi (2,153.20 km) |
| Sittingbourne to Silistra | 1,320.60 mi (2,125.30 km) |
| Sittingbourne to Sliven | 1,336.50 mi (2,150.89 km) |
