| West Lafayette to Popovo | 5,309.15 mi (8,544.26 km) |
| West Lafayette to Provadia | 5,360.34 mi (8,626.63 km) |
| West Lafayette to Radnevo | 5,348.68 mi (8,607.87 km) |
| West Lafayette to Radomir | 5,225.97 mi (8,410.39 km) |
| West Lafayette to Rakitovo | 5,295.10 mi (8,521.65 km) |
| West Lafayette to Rakovski | 5,313.53 mi (8,551.31 km) |
| West Lafayette to Razgrad | 5,310.54 mi (8,546.49 km) |
| West Lafayette to Razlog | 5,276.61 mi (8,491.88 km) |
| West Lafayette to Ruse | 5,276.40 mi (8,491.55 km) |
| West Lafayette to Samokov | 5,258.66 mi (8,462.99 km) |
| West Lafayette to Sandanski | 5,284.41 mi (8,504.43 km) |
| West Lafayette to Sevlievo | 5,283.92 mi (8,503.64 km) |
| West Lafayette to Shumen | 5,337.57 mi (8,589.99 km) |
| West Lafayette to Silistra | 5,308.85 mi (8,543.77 km) |
| West Lafayette to Sliven | 5,344.86 mi (8,601.72 km) |
