| Port Royal to Popovo | 5,467.96 mi (8,799.84 km) |
| Port Royal to Provadia | 5,524.02 mi (8,890.06 km) |
| Port Royal to Radnevo | 5,496.67 mi (8,846.04 km) |
| Port Royal to Radomir | 5,360.52 mi (8,626.92 km) |
| Port Royal to Rakitovo | 5,430.44 mi (8,739.45 km) |
| Port Royal to Rakovski | 5,456.27 mi (8,781.03 km) |
| Port Royal to Razgrad | 5,472.44 mi (8,807.05 km) |
| Port Royal to Razlog | 5,407.79 mi (8,702.99 km) |
| Port Royal to Ruse | 5,437.92 mi (8,751.49 km) |
| Port Royal to Samokov | 5,394.42 mi (8,681.47 km) |
| Port Royal to Sandanski | 5,411.75 mi (8,709.38 km) |
| Port Royal to Sevlievo | 5,434.00 mi (8,745.18 km) |
| Port Royal to Shumen | 5,499.48 mi (8,850.55 km) |
| Port Royal to Silistra | 5,479.72 mi (8,818.76 km) |
| Port Royal to Sliven | 5,498.35 mi (8,848.74 km) |
