| Boulogne-Billancourt to Popovo | 1,204.53 mi (1,938.51 km) |
| Boulogne-Billancourt to Provadia | 1,263.64 mi (2,033.63 km) |
| Boulogne-Billancourt to Radnevo | 1,225.46 mi (1,972.18 km) |
| Boulogne-Billancourt to Radomir | 1,085.25 mi (1,746.55 km) |
| Boulogne-Billancourt to Rakitovo | 1,155.10 mi (1,858.95 km) |
| Boulogne-Billancourt to Rakovski | 1,183.02 mi (1,903.89 km) |
| Boulogne-Billancourt to Razgrad | 1,211.64 mi (1,949.94 km) |
| Boulogne-Billancourt to Razlog | 1,131.88 mi (1,821.58 km) |
| Boulogne-Billancourt to Ruse | 1,177.61 mi (1,895.18 km) |
| Boulogne-Billancourt to Samokov | 1,119.30 mi (1,801.34 km) |
| Boulogne-Billancourt to Sandanski | 1,135.70 mi (1,827.74 km) |
| Boulogne-Billancourt to Sevlievo | 1,164.74 mi (1,874.48 km) |
| Boulogne-Billancourt to Shumen | 1,238.05 mi (1,992.44 km) |
| Boulogne-Billancourt to Silistra | 1,228.06 mi (1,976.37 km) |
| Boulogne-Billancourt to Sliven | 1,230.36 mi (1,980.08 km) |
