| Gravelines to Orvault | 307.51 mi (494.89 km) |
| Gravelines to Osny | 133.19 mi (214.35 km) |
| Gravelines to Ostwald | 300.63 mi (483.81 km) |
| Gravelines to Ouistreham | 158.35 mi (254.83 km) |
| Gravelines to Oullins | 384.39 mi (618.61 km) |
| Gravelines to Outreau | 30.38 mi (48.89 km) |
| Gravelines to Oyonnax | 364.29 mi (586.27 km) |
| Gravelines to Ozoir-la-Ferriere | 154.55 mi (248.73 km) |
| Gravelines to Pace | 262.66 mi (422.71 km) |
| Gravelines to Palaiseau | 157.06 mi (252.77 km) |
| Gravelines to Pamiers | 544.30 mi (875.97 km) |
| Gravelines to Panazol | 357.62 mi (575.54 km) |
| Gravelines to Pantin | 144.90 mi (233.20 km) |
| Gravelines to Paray-le-Monial | 326.22 mi (524.99 km) |
| Gravelines to Parempuyre | 435.78 mi (701.32 km) |
