| Boulogne-sur-Mer to Orvault | 280.13 mi (450.83 km) |
| Boulogne-sur-Mer to Osny | 116.90 mi (188.14 km) |
| Boulogne-sur-Mer to Ostwald | 311.41 mi (501.16 km) |
| Boulogne-sur-Mer to Ouistreham | 130.06 mi (209.31 km) |
| Boulogne-sur-Mer to Oullins | 376.08 mi (605.24 km) |
| Boulogne-sur-Mer to Outreau | 1.80 mi (2.90 km) |
| Boulogne-sur-Mer to Oyonnax | 359.92 mi (579.24 km) |
| Boulogne-sur-Mer to Ozoir-la-Ferriere | 142.77 mi (229.77 km) |
| Boulogne-sur-Mer to Pace | 234.30 mi (377.08 km) |
| Boulogne-sur-Mer to Palaiseau | 141.84 mi (228.26 km) |
| Boulogne-sur-Mer to Pamiers | 525.80 mi (846.19 km) |
| Boulogne-sur-Mer to Panazol | 337.98 mi (543.93 km) |
| Boulogne-sur-Mer to Pantin | 131.20 mi (211.15 km) |
| Boulogne-sur-Mer to Paray-le-Monial | 316.75 mi (509.76 km) |
| Boulogne-sur-Mer to Parempuyre | 412.18 mi (663.33 km) |
