| Frederickson to Popovo | 5,900.40 mi (9,495.78 km) |
| Frederickson to Provadia | 5,932.31 mi (9,547.12 km) |
| Frederickson to Radnevo | 5,962.73 mi (9,596.09 km) |
| Frederickson to Radomir | 5,889.85 mi (9,478.79 km) |
| Frederickson to Rakitovo | 5,948.21 mi (9,572.72 km) |
| Frederickson to Rakovski | 5,945.50 mi (9,568.36 km) |
| Frederickson to Razgrad | 5,893.60 mi (9,484.84 km) |
| Frederickson to Razlog | 5,942.55 mi (9,563.60 km) |
| Frederickson to Ruse | 5,864.88 mi (9,438.61 km) |
| Frederickson to Samokov | 5,915.32 mi (9,519.79 km) |
| Frederickson to Sandanski | 5,959.00 mi (9,590.08 km) |
| Frederickson to Sevlievo | 5,900.90 mi (9,496.58 km) |
| Frederickson to Shumen | 5,917.11 mi (9,522.68 km) |
| Frederickson to Silistra | 5,868.76 mi (9,444.85 km) |
| Frederickson to Sliven | 5,945.26 mi (9,567.97 km) |
