| Rockwall to Popovo | 6,046.07 mi (9,730.22 km) |
| Rockwall to Provadia | 6,096.68 mi (9,811.65 km) |
| Rockwall to Radnevo | 6,086.51 mi (9,795.30 km) |
| Rockwall to Radomir | 5,964.81 mi (9,599.43 km) |
| Rockwall to Rakitovo | 6,033.84 mi (9,710.53 km) |
| Rockwall to Rakovski | 6,051.79 mi (9,739.42 km) |
| Rockwall to Razgrad | 6,047.15 mi (9,731.94 km) |
| Rockwall to Razlog | 6,015.57 mi (9,681.13 km) |
| Rockwall to Ruse | 6,013.10 mi (9,677.15 km) |
| Rockwall to Samokov | 5,997.40 mi (9,651.89 km) |
| Rockwall to Sandanski | 6,023.54 mi (9,693.95 km) |
| Rockwall to Sevlievo | 6,021.66 mi (9,690.92 km) |
| Rockwall to Shumen | 6,074.13 mi (9,775.37 km) |
| Rockwall to Silistra | 6,044.45 mi (9,727.61 km) |
| Rockwall to Sliven | 6,082.23 mi (9,788.41 km) |
