| Porto to Popovo | 1,775.88 mi (2,858.01 km) |
| Porto to Provadia | 1,837.25 mi (2,956.77 km) |
| Porto to Radnevo | 1,771.23 mi (2,850.52 km) |
| Porto to Radomir | 1,618.18 mi (2,604.22 km) |
| Porto to Rakitovo | 1,681.16 mi (2,705.57 km) |
| Porto to Rakovski | 1,722.51 mi (2,772.11 km) |
| Porto to Razgrad | 1,788.42 mi (2,878.19 km) |
| Porto to Razlog | 1,650.97 mi (2,656.97 km) |
| Porto to Ruse | 1,758.20 mi (2,829.55 km) |
| Porto to Samokov | 1,650.76 mi (2,656.64 km) |
| Porto to Sandanski | 1,645.16 mi (2,647.62 km) |
| Porto to Sevlievo | 1,722.76 mi (2,772.51 km) |
| Porto to Shumen | 1,811.37 mi (2,915.12 km) |
| Porto to Silistra | 1,820.63 mi (2,930.02 km) |
| Porto to Sliven | 1,787.24 mi (2,876.29 km) |
