| Riviera Beach to Popovo | 5,714.17 mi (9,196.08 km) |
| Riviera Beach to Provadia | 5,771.99 mi (9,289.12 km) |
| Riviera Beach to Radnevo | 5,737.55 mi (9,233.69 km) |
| Riviera Beach to Radomir | 5,596.34 mi (9,006.43 km) |
| Riviera Beach to Rakitovo | 5,665.96 mi (9,118.49 km) |
| Riviera Beach to Rakovski | 5,695.06 mi (9,165.31 km) |
| Riviera Beach to Razgrad | 5,720.05 mi (9,205.53 km) |
| Riviera Beach to Razlog | 5,641.55 mi (9,079.19 km) |
| Riviera Beach to Ruse | 5,685.67 mi (9,150.20 km) |
| Riviera Beach to Samokov | 5,630.48 mi (9,061.39 km) |
| Riviera Beach to Sandanski | 5,643.65 mi (9,082.57 km) |
| Riviera Beach to Sevlievo | 5,676.45 mi (9,135.36 km) |
| Riviera Beach to Shumen | 5,746.84 mi (9,248.64 km) |
| Riviera Beach to Silistra | 5,731.41 mi (9,223.81 km) |
| Riviera Beach to Sliven | 5,741.79 mi (9,240.52 km) |
