| Mercer Island to Nyon | 5,239.35 mi (8,431.92 km) |
| Mercer Island to Oberriet | 5,268.46 mi (8,478.76 km) |
| Mercer Island to Obersiggenthal | 5,227.22 mi (8,412.39 km) |
| Mercer Island to Oberwil | 5,207.32 mi (8,380.38 km) |
| Mercer Island to Oberwingert | 5,237.19 mi (8,428.44 km) |
| Mercer Island to Oftringen | 5,227.86 mi (8,413.43 km) |
| Mercer Island to Olten | 5,225.50 mi (8,409.63 km) |
| Mercer Island to Onex | 5,247.46 mi (8,444.97 km) |
| Mercer Island to Opfikon | 5,237.14 mi (8,428.35 km) |
| Mercer Island to Ostermundigen | 5,238.27 mi (8,430.19 km) |
| Mercer Island to Payerne | 5,232.21 mi (8,420.43 km) |
| Mercer Island to Pfaffikon | 5,246.38 mi (8,443.23 km) |
| Mercer Island to Plan-les-Ouates | 5,248.86 mi (8,447.22 km) |
| Mercer Island to Pratteln | 5,210.77 mi (8,385.92 km) |
| Mercer Island to Prilly | 5,240.14 mi (8,433.18 km) |
