| Knightdale to Popovo | 5,212.04 mi (8,387.96 km) |
| Knightdale to Provadia | 5,267.55 mi (8,477.30 km) |
| Knightdale to Radnevo | 5,242.23 mi (8,436.55 km) |
| Knightdale to Radomir | 5,107.73 mi (8,220.10 km) |
| Knightdale to Rakitovo | 5,177.66 mi (8,332.65 km) |
| Knightdale to Rakovski | 5,202.49 mi (8,372.60 km) |
| Knightdale to Razgrad | 5,216.12 mi (8,394.54 km) |
| Knightdale to Razlog | 5,155.57 mi (8,297.09 km) |
| Knightdale to Ruse | 5,181.60 mi (8,338.98 km) |
| Knightdale to Samokov | 5,141.52 mi (8,274.47 km) |
| Knightdale to Sandanski | 5,160.11 mi (8,304.39 km) |
| Knightdale to Sevlievo | 5,179.17 mi (8,335.08 km) |
| Knightdale to Shumen | 5,243.20 mi (8,438.11 km) |
| Knightdale to Silistra | 5,222.28 mi (8,404.45 km) |
| Knightdale to Sliven | 5,243.17 mi (8,438.06 km) |
