| Casselberry to Popovo | 5,675.13 mi (9,133.24 km) |
| Casselberry to Provadia | 5,732.13 mi (9,224.97 km) |
| Casselberry to Radnevo | 5,701.10 mi (9,175.03 km) |
| Casselberry to Radomir | 5,562.20 mi (8,951.50 km) |
| Casselberry to Rakitovo | 5,632.03 mi (9,063.87 km) |
| Casselberry to Rakovski | 5,659.58 mi (9,108.22 km) |
| Casselberry to Razgrad | 5,680.33 mi (9,141.61 km) |
| Casselberry to Razlog | 5,608.43 mi (9,025.89 km) |
| Casselberry to Ruse | 5,645.86 mi (9,086.13 km) |
| Casselberry to Samokov | 5,596.26 mi (9,006.31 km) |
| Casselberry to Sandanski | 5,611.42 mi (9,030.70 km) |
| Casselberry to Sevlievo | 5,639.20 mi (9,075.41 km) |
| Casselberry to Shumen | 5,707.26 mi (9,184.94 km) |
| Casselberry to Silistra | 5,689.70 mi (9,156.69 km) |
| Casselberry to Sliven | 5,704.11 mi (9,179.88 km) |
