| Northport to Popovo | 5,699.24 mi (9,172.05 km) |
| Northport to Provadia | 5,752.95 mi (9,258.48 km) |
| Northport to Radnevo | 5,733.62 mi (9,227.37 km) |
| Northport to Radomir | 5,603.80 mi (9,018.44 km) |
| Northport to Rakitovo | 5,673.57 mi (9,130.73 km) |
| Northport to Rakovski | 5,695.76 mi (9,166.44 km) |
| Northport to Razgrad | 5,702.13 mi (9,176.69 km) |
| Northport to Razlog | 5,652.91 mi (9,097.49 km) |
| Northport to Ruse | 5,667.69 mi (9,121.27 km) |
| Northport to Samokov | 5,637.21 mi (9,072.21 km) |
| Northport to Sandanski | 5,658.80 mi (9,106.96 km) |
| Northport to Sevlievo | 5,669.66 mi (9,124.44 km) |
| Northport to Shumen | 5,729.25 mi (9,220.34 km) |
| Northport to Silistra | 5,704.72 mi (9,180.87 km) |
| Northport to Sliven | 5,732.48 mi (9,225.54 km) |
