| Redding to Popovo | 6,317.45 mi (10,166.95 km) |
| Redding to Provadia | 6,351.55 mi (10,221.83 km) |
| Redding to Radnevo | 6,377.96 mi (10,264.34 km) |
| Redding to Radomir | 6,298.96 mi (10,137.20 km) |
| Redding to Rakitovo | 6,359.08 mi (10,233.95 km) |
| Redding to Rakovski | 6,358.67 mi (10,233.29 km) |
| Redding to Razgrad | 6,311.41 mi (10,157.24 km) |
| Redding to Razlog | 6,351.92 mi (10,222.42 km) |
| Redding to Ruse | 6,281.89 mi (10,109.73 km) |
| Redding to Samokov | 6,325.49 mi (10,179.90 km) |
| Redding to Sandanski | 6,367.53 mi (10,247.55 km) |
| Redding to Sevlievo | 6,315.27 mi (10,163.45 km) |
| Redding to Shumen | 6,335.48 mi (10,195.97 km) |
| Redding to Silistra | 6,288.64 mi (10,120.59 km) |
| Redding to Sliven | 6,361.75 mi (10,238.25 km) |
