| Frogn to Popovo | 1,305.83 mi (2,101.53 km) |
| Frogn to Provadia | 1,342.10 mi (2,159.89 km) |
| Frogn to Radnevo | 1,365.98 mi (2,198.33 km) |
| Frogn to Radomir | 1,294.43 mi (2,083.18 km) |
| Frogn to Rakitovo | 1,351.06 mi (2,174.32 km) |
| Frogn to Rakovski | 1,347.76 mi (2,169.01 km) |
| Frogn to Razgrad | 1,300.37 mi (2,092.74 km) |
| Frogn to Razlog | 1,346.69 mi (2,167.28 km) |
| Frogn to Ruse | 1,270.29 mi (2,044.34 km) |
| Frogn to Samokov | 1,318.74 mi (2,122.31 km) |
| Frogn to Sandanski | 1,364.09 mi (2,195.29 km) |
| Frogn to Sevlievo | 1,303.54 mi (2,097.85 km) |
| Frogn to Shumen | 1,324.94 mi (2,132.29 km) |
| Frogn to Silistra | 1,280.49 mi (2,060.74 km) |
| Frogn to Sliven | 1,349.87 mi (2,172.41 km) |
