| Penkridge to Popovo | 1,448.28 mi (2,330.77 km) |
| Penkridge to Provadia | 1,503.70 mi (2,419.97 km) |
| Penkridge to Radnevo | 1,480.55 mi (2,382.71 km) |
| Penkridge to Radomir | 1,351.94 mi (2,175.74 km) |
| Penkridge to Rakitovo | 1,421.47 mi (2,287.64 km) |
| Penkridge to Rakovski | 1,442.64 mi (2,321.70 km) |
| Penkridge to Razgrad | 1,452.26 mi (2,337.18 km) |
| Penkridge to Razlog | 1,401.97 mi (2,256.25 km) |
| Penkridge to Ruse | 1,417.73 mi (2,281.62 km) |
| Penkridge to Samokov | 1,385.04 mi (2,229.01 km) |
| Penkridge to Sandanski | 1,409.25 mi (2,267.97 km) |
| Penkridge to Sevlievo | 1,416.79 mi (2,280.11 km) |
| Penkridge to Shumen | 1,479.33 mi (2,380.75 km) |
| Penkridge to Silistra | 1,459.28 mi (2,348.48 km) |
| Penkridge to Sliven | 1,480.13 mi (2,382.03 km) |
