| Ridgecrest to Popovo | 6,526.01 mi (10,502.59 km) |
| Ridgecrest to Provadia | 6,564.75 mi (10,564.94 km) |
| Ridgecrest to Radnevo | 6,582.22 mi (10,593.06 km) |
| Ridgecrest to Radomir | 6,491.07 mi (10,446.37 km) |
| Ridgecrest to Rakitovo | 6,554.34 mi (10,548.19 km) |
| Ridgecrest to Rakovski | 6,558.69 mi (10,555.20 km) |
| Ridgecrest to Razgrad | 6,521.69 mi (10,495.65 km) |
| Ridgecrest to Razlog | 6,544.18 mi (10,531.83 km) |
| Ridgecrest to Ruse | 6,490.63 mi (10,445.65 km) |
| Ridgecrest to Samokov | 6,519.55 mi (10,492.20 km) |
| Ridgecrest to Sandanski | 6,557.99 mi (10,554.07 km) |
| Ridgecrest to Sevlievo | 6,518.12 mi (10,489.90 km) |
| Ridgecrest to Shumen | 6,546.82 mi (10,536.10 km) |
| Ridgecrest to Silistra | 6,503.67 mi (10,466.65 km) |
| Ridgecrest to Sliven | 6,568.84 mi (10,571.53 km) |
