| Blackrock to Orthez | 721.47 mi (1,161.10 km) |
| Blackrock to Orvault | 462.39 mi (744.14 km) |
| Blackrock to Osny | 461.34 mi (742.46 km) |
| Blackrock to Ostwald | 686.65 mi (1,105.06 km) |
| Blackrock to Ouistreham | 377.45 mi (607.45 km) |
| Blackrock to Oullins | 717.95 mi (1,155.43 km) |
| Blackrock to Outreau | 375.87 mi (604.90 km) |
| Blackrock to Oyonnax | 716.45 mi (1,153.02 km) |
| Blackrock to Ozoir-la-Ferriere | 495.14 mi (796.85 km) |
| Blackrock to Pace | 404.66 mi (651.24 km) |
| Blackrock to Palaiseau | 483.74 mi (778.51 km) |
| Blackrock to Pamiers | 788.74 mi (1,269.36 km) |
| Blackrock to Panazol | 614.43 mi (988.82 km) |
| Blackrock to Pantin | 480.27 mi (772.93 km) |
| Blackrock to Paray-le-Monial | 657.73 mi (1,058.52 km) |
