| Boulogne-Billancourt to Navodari | 1,283.66 mi (2,065.85 km) |
| Boulogne-Billancourt to Negresti-Oas | 971.78 mi (1,563.93 km) |
| Boulogne-Billancourt to Nehoiu | 1,152.06 mi (1,854.07 km) |
| Boulogne-Billancourt to Ocna Mures | 1,017.48 mi (1,637.48 km) |
| Boulogne-Billancourt to Odobesti | 1,176.90 mi (1,894.03 km) |
| Boulogne-Billancourt to Odorheiu Secuiesc | 1,084.62 mi (1,745.53 km) |
| Boulogne-Billancourt to Oltenita | 1,200.72 mi (1,932.38 km) |
| Boulogne-Billancourt to Onesti | 1,152.53 mi (1,854.81 km) |
| Boulogne-Billancourt to Oradea | 916.17 mi (1,474.43 km) |
| Boulogne-Billancourt to Orastie | 999.31 mi (1,608.24 km) |
| Boulogne-Billancourt to Oravita | 951.07 mi (1,530.60 km) |
| Boulogne-Billancourt to Orsova | 991.65 mi (1,595.90 km) |
| Boulogne-Billancourt to Otelu Rosu | 968.84 mi (1,559.19 km) |
| Boulogne-Billancourt to Otopeni | 1,162.16 mi (1,870.32 km) |
| Boulogne-Billancourt to Ovidiu | 1,282.65 mi (2,064.22 km) |
