| Panama City to Popovo | 5,775.86 mi (9,295.35 km) |
| Panama City to Provadia | 5,831.22 mi (9,384.44 km) |
| Panama City to Radnevo | 5,806.34 mi (9,344.40 km) |
| Panama City to Radomir | 5,671.96 mi (9,128.14 km) |
| Panama City to Rakitovo | 5,741.89 mi (9,240.68 km) |
| Panama City to Rakovski | 5,766.67 mi (9,280.56 km) |
| Panama City to Razgrad | 5,779.84 mi (9,301.75 km) |
| Panama City to Razlog | 5,719.79 mi (9,205.12 km) |
| Panama City to Ruse | 5,745.32 mi (9,246.19 km) |
| Panama City to Samokov | 5,705.74 mi (9,182.50 km) |
| Panama City to Sandanski | 5,724.31 mi (9,212.38 km) |
| Panama City to Sevlievo | 5,743.23 mi (9,242.84 km) |
| Panama City to Shumen | 5,806.92 mi (9,345.33 km) |
| Panama City to Silistra | 5,785.61 mi (9,311.03 km) |
| Panama City to Sliven | 5,807.16 mi (9,345.72 km) |
