| Altoona to Popovo | 4,986.40 mi (8,024.84 km) |
| Altoona to Provadia | 5,040.19 mi (8,111.40 km) |
| Altoona to Radnevo | 5,020.75 mi (8,080.12 km) |
| Altoona to Radomir | 4,891.19 mi (7,871.61 km) |
| Altoona to Rakitovo | 4,960.93 mi (7,983.85 km) |
| Altoona to Rakovski | 4,982.95 mi (8,019.29 km) |
| Altoona to Razgrad | 4,989.33 mi (8,029.55 km) |
| Altoona to Razlog | 4,940.42 mi (7,950.83 km) |
| Altoona to Ruse | 4,954.89 mi (7,974.12 km) |
| Altoona to Samokov | 4,924.56 mi (7,925.31 km) |
| Altoona to Sandanski | 4,946.46 mi (7,960.55 km) |
| Altoona to Sevlievo | 4,956.79 mi (7,977.18 km) |
| Altoona to Shumen | 5,016.45 mi (8,073.20 km) |
| Altoona to Silistra | 4,992.16 mi (8,034.10 km) |
| Altoona to Sliven | 5,019.60 mi (8,078.27 km) |
