| Irvine to Popovo | 1,605.38 mi (2,583.61 km) |
| Irvine to Provadia | 1,657.63 mi (2,667.70 km) |
| Irvine to Radnevo | 1,644.45 mi (2,646.49 km) |
| Irvine to Radomir | 1,524.97 mi (2,454.21 km) |
| Irvine to Rakitovo | 1,593.40 mi (2,564.32 km) |
| Irvine to Rakovski | 1,609.95 mi (2,590.97 km) |
| Irvine to Razgrad | 1,607.31 mi (2,586.72 km) |
| Irvine to Razlog | 1,576.53 mi (2,537.18 km) |
| Irvine to Ruse | 1,573.02 mi (2,531.54 km) |
| Irvine to Samokov | 1,557.03 mi (2,505.80 km) |
| Irvine to Sandanski | 1,585.96 mi (2,552.36 km) |
| Irvine to Sevlievo | 1,579.64 mi (2,542.18 km) |
| Irvine to Shumen | 1,634.40 mi (2,630.32 km) |
| Irvine to Silistra | 1,608.27 mi (2,588.26 km) |
| Irvine to Sliven | 1,640.61 mi (2,640.31 km) |
