| Portsmouth to Popovo | 1,374.99 mi (2,212.83 km) |
| Portsmouth to Provadia | 1,432.47 mi (2,305.34 km) |
| Portsmouth to Radnevo | 1,401.55 mi (2,255.58 km) |
| Portsmouth to Radomir | 1,266.43 mi (2,038.12 km) |
| Portsmouth to Rakitovo | 1,336.34 mi (2,150.64 km) |
| Portsmouth to Rakovski | 1,361.16 mi (2,190.57 km) |
| Portsmouth to Razgrad | 1,380.56 mi (2,221.80 km) |
| Portsmouth to Razlog | 1,314.79 mi (2,115.94 km) |
| Portsmouth to Ruse | 1,346.15 mi (2,166.42 km) |
| Portsmouth to Samokov | 1,300.14 mi (2,092.37 km) |
| Portsmouth to Sandanski | 1,320.21 mi (2,124.67 km) |
| Portsmouth to Sevlievo | 1,339.16 mi (2,155.17 km) |
| Portsmouth to Shumen | 1,407.40 mi (2,264.99 km) |
| Portsmouth to Silistra | 1,392.30 mi (2,240.68 km) |
| Portsmouth to Sliven | 1,403.88 mi (2,259.33 km) |
