| Oro Valley to Popovo | 6,545.08 mi (10,533.30 km) |
| Oro Valley to Provadia | 6,588.91 mi (10,603.83 km) |
| Oro Valley to Radnevo | 6,595.54 mi (10,614.50 km) |
| Oro Valley to Radomir | 6,491.21 mi (10,446.59 km) |
| Oro Valley to Rakitovo | 6,557.41 mi (10,553.13 km) |
| Oro Valley to Rakovski | 6,567.29 mi (10,569.04 km) |
| Oro Valley to Razgrad | 6,542.87 mi (10,529.73 km) |
| Oro Valley to Razlog | 6,543.86 mi (10,531.33 km) |
| Oro Valley to Ruse | 6,510.32 mi (10,477.34 km) |
| Oro Valley to Samokov | 6,521.62 mi (10,495.54 km) |
| Oro Valley to Sandanski | 6,555.43 mi (10,549.95 km) |
| Oro Valley to Sevlievo | 6,530.52 mi (10,509.86 km) |
| Oro Valley to Shumen | 6,568.98 mi (10,571.76 km) |
| Oro Valley to Silistra | 6,530.74 mi (10,510.21 km) |
| Oro Valley to Sliven | 6,585.67 mi (10,598.62 km) |
