| Castle Rock to Nyon | 5,146.60 mi (8,282.65 km) |
| Castle Rock to Oberriet | 5,219.30 mi (8,399.65 km) |
| Castle Rock to Obersiggenthal | 5,167.66 mi (8,316.55 km) |
| Castle Rock to Oberwil | 5,140.97 mi (8,273.60 km) |
| Castle Rock to Oberwingert | 5,182.61 mi (8,340.60 km) |
| Castle Rock to Oftringen | 5,162.65 mi (8,308.48 km) |
| Castle Rock to Olten | 5,160.52 mi (8,305.05 km) |
| Castle Rock to Onex | 5,150.99 mi (8,289.72 km) |
| Castle Rock to Opfikon | 5,179.60 mi (8,335.77 km) |
| Castle Rock to Ostermundigen | 5,164.60 mi (8,311.61 km) |
| Castle Rock to Payerne | 5,151.49 mi (8,290.51 km) |
| Castle Rock to Pfaffikon | 5,190.16 mi (8,352.76 km) |
| Castle Rock to Plan-les-Ouates | 5,152.35 mi (8,291.91 km) |
| Castle Rock to Pratteln | 5,145.86 mi (8,281.45 km) |
| Castle Rock to Prilly | 5,152.76 mi (8,292.56 km) |
