| Calexico to Popovo | 6,653.91 mi (10,708.44 km) |
| Calexico to Provadia | 6,695.03 mi (10,774.60 km) |
| Calexico to Radnevo | 6,707.58 mi (10,794.80 km) |
| Calexico to Radomir | 6,610.17 mi (10,638.04 km) |
| Calexico to Rakitovo | 6,674.91 mi (10,742.22 km) |
| Calexico to Rakovski | 6,681.83 mi (10,753.37 km) |
| Calexico to Razgrad | 6,650.55 mi (10,703.02 km) |
| Calexico to Razlog | 6,663.14 mi (10,723.29 km) |
| Calexico to Ruse | 6,618.76 mi (10,651.86 km) |
| Calexico to Samokov | 6,639.60 mi (10,685.40 km) |
| Calexico to Sandanski | 6,675.93 mi (10,743.87 km) |
| Calexico to Sevlievo | 6,642.95 mi (10,690.80 km) |
| Calexico to Shumen | 6,676.17 mi (10,744.25 km) |
| Calexico to Silistra | 6,635.17 mi (10,678.27 km) |
| Calexico to Sliven | 6,695.79 mi (10,775.83 km) |
