| Imperial Beach to Popovo | 6,703.13 mi (10,787.65 km) |
| Imperial Beach to Provadia | 6,743.29 mi (10,852.28 km) |
| Imperial Beach to Radnevo | 6,757.84 mi (10,875.69 km) |
| Imperial Beach to Radomir | 6,662.84 mi (10,722.80 km) |
| Imperial Beach to Rakitovo | 6,727.03 mi (10,826.11 km) |
| Imperial Beach to Rakovski | 6,732.96 mi (10,835.65 km) |
| Imperial Beach to Razgrad | 6,699.38 mi (10,781.61 km) |
| Imperial Beach to Razlog | 6,715.88 mi (10,808.17 km) |
| Imperial Beach to Ruse | 6,667.87 mi (10,730.90 km) |
| Imperial Beach to Samokov | 6,691.91 mi (10,769.59 km) |
| Imperial Beach to Sandanski | 6,729.06 mi (10,829.38 km) |
| Imperial Beach to Sevlievo | 6,693.40 mi (10,771.98 km) |
| Imperial Beach to Shumen | 6,724.81 mi (10,822.53 km) |
| Imperial Beach to Silistra | 6,682.91 mi (10,755.11 km) |
| Imperial Beach to Sliven | 6,745.41 mi (10,855.68 km) |
