| Mount Washington to Nyon | 4,462.29 mi (7,181.36 km) |
| Mount Washington to Oberriet | 4,566.16 mi (7,348.53 km) |
| Mount Washington to Obersiggenthal | 4,508.83 mi (7,256.27 km) |
| Mount Washington to Oberwil | 4,478.07 mi (7,206.75 km) |
| Mount Washington to Oberwingert | 4,527.02 mi (7,285.54 km) |
| Mount Washington to Oftringen | 4,499.52 mi (7,241.27 km) |
| Mount Washington to Olten | 4,497.69 mi (7,238.33 km) |
| Mount Washington to Onex | 4,463.52 mi (7,183.34 km) |
| Mount Washington to Opfikon | 4,521.78 mi (7,277.11 km) |
| Mount Washington to Ostermundigen | 4,494.56 mi (7,233.30 km) |
| Mount Washington to Payerne | 4,476.49 mi (7,204.21 km) |
| Mount Washington to Pfaffikon | 4,532.85 mi (7,294.92 km) |
| Mount Washington to Plan-les-Ouates | 4,464.78 mi (7,185.37 km) |
| Mount Washington to Pratteln | 4,483.85 mi (7,216.06 km) |
| Mount Washington to Prilly | 4,472.40 mi (7,197.63 km) |
