| Castle Rock to Orthez | 5,011.60 mi (8,065.39 km) |
| Castle Rock to Orvault | 4,819.84 mi (7,756.78 km) |
| Castle Rock to Osny | 4,879.33 mi (7,852.52 km) |
| Castle Rock to Ostwald | 5,098.42 mi (8,205.11 km) |
| Castle Rock to Ouistreham | 4,787.02 mi (7,703.97 km) |
| Castle Rock to Oullins | 5,125.58 mi (8,248.82 km) |
| Castle Rock to Outreau | 4,792.93 mi (7,713.48 km) |
| Castle Rock to Oyonnax | 5,131.72 mi (8,258.71 km) |
| Castle Rock to Ozoir-la-Ferriere | 4,913.36 mi (7,907.29 km) |
| Castle Rock to Pace | 4,778.17 mi (7,689.72 km) |
| Castle Rock to Palaiseau | 4,900.66 mi (7,886.85 km) |
| Castle Rock to Pamiers | 5,120.93 mi (8,241.35 km) |
| Castle Rock to Panazol | 4,990.59 mi (8,031.58 km) |
| Castle Rock to Pantin | 4,898.36 mi (7,883.15 km) |
| Castle Rock to Paray-le-Monial | 5,067.43 mi (8,155.24 km) |
