| Rowland Heights to Popovo | 6,635.13 mi (10,678.21 km) |
| Rowland Heights to Provadia | 6,674.31 mi (10,741.27 km) |
| Rowland Heights to Radnevo | 6,690.87 mi (10,767.92 km) |
| Rowland Heights to Radomir | 6,598.47 mi (10,619.20 km) |
| Rowland Heights to Rakitovo | 6,662.05 mi (10,721.53 km) |
| Rowland Heights to Rakovski | 6,666.91 mi (10,729.36 km) |
| Rowland Heights to Razgrad | 6,630.99 mi (10,671.55 km) |
| Rowland Heights to Razlog | 6,651.55 mi (10,704.64 km) |
| Rowland Heights to Ruse | 6,599.78 mi (10,621.32 km) |
| Rowland Heights to Samokov | 6,627.14 mi (10,665.36 km) |
| Rowland Heights to Sandanski | 6,665.16 mi (10,726.54 km) |
| Rowland Heights to Sevlievo | 6,626.66 mi (10,664.58 km) |
| Rowland Heights to Shumen | 6,656.22 mi (10,712.14 km) |
| Rowland Heights to Silistra | 6,613.44 mi (10,643.31 km) |
| Rowland Heights to Sliven | 6,677.79 mi (10,746.87 km) |
