| Mercer Island to Orthez | 5,208.14 mi (8,381.69 km) |
| Mercer Island to Orvault | 4,974.61 mi (8,005.86 km) |
| Mercer Island to Osny | 4,977.31 mi (8,010.20 km) |
| Mercer Island to Ostwald | 5,150.75 mi (8,289.34 km) |
| Mercer Island to Ouistreham | 4,902.64 mi (7,890.03 km) |
| Mercer Island to Oullins | 5,240.31 mi (8,433.46 km) |
| Mercer Island to Outreau | 4,873.26 mi (7,842.76 km) |
| Mercer Island to Oyonnax | 5,231.62 mi (8,419.48 km) |
| Mercer Island to Ozoir-la-Ferriere | 5,009.44 mi (8,061.92 km) |
| Mercer Island to Pace | 4,922.44 mi (7,921.91 km) |
| Mercer Island to Palaiseau | 5,001.50 mi (8,049.13 km) |
| Mercer Island to Pamiers | 5,299.06 mi (8,528.02 km) |
| Mercer Island to Panazol | 5,137.21 mi (8,267.54 km) |
| Mercer Island to Pantin | 4,995.41 mi (8,039.34 km) |
| Mercer Island to Paray-le-Monial | 5,179.68 mi (8,335.89 km) |
