| Kaukauna to Popovo | 5,163.41 mi (8,309.70 km) |
| Kaukauna to Provadia | 5,212.45 mi (8,388.64 km) |
| Kaukauna to Radnevo | 5,206.66 mi (8,379.31 km) |
| Kaukauna to Radomir | 5,089.81 mi (8,191.25 km) |
| Kaukauna to Rakitovo | 5,158.15 mi (8,301.24 km) |
| Kaukauna to Rakovski | 5,173.70 mi (8,326.26 km) |
| Kaukauna to Razgrad | 5,163.65 mi (8,310.09 km) |
| Kaukauna to Razlog | 5,141.34 mi (8,274.18 km) |
| Kaukauna to Ruse | 5,129.88 mi (8,255.74 km) |
| Kaukauna to Samokov | 5,121.81 mi (8,242.75 km) |
| Kaukauna to Sandanski | 5,150.52 mi (8,288.96 km) |
| Kaukauna to Sevlievo | 5,141.56 mi (8,274.54 km) |
| Kaukauna to Shumen | 5,190.49 mi (8,353.29 km) |
| Kaukauna to Silistra | 5,158.68 mi (8,302.10 km) |
| Kaukauna to Sliven | 5,200.83 mi (8,369.93 km) |
