| Mercer Island to Nasaud | 5,582.42 mi (8,984.03 km) |
| Mercer Island to Navodari | 5,845.36 mi (9,407.21 km) |
| Mercer Island to Negresti-Oas | 5,527.52 mi (8,895.69 km) |
| Mercer Island to Nehoiu | 5,739.65 mi (9,237.07 km) |
| Mercer Island to Ocna Mures | 5,629.78 mi (9,060.25 km) |
| Mercer Island to Odobesti | 5,725.82 mi (9,214.82 km) |
| Mercer Island to Odorheiu Secuiesc | 5,660.32 mi (9,109.40 km) |
| Mercer Island to Oltenita | 5,827.27 mi (9,378.08 km) |
| Mercer Island to Onesti | 5,688.99 mi (9,155.54 km) |
| Mercer Island to Oradea | 5,550.52 mi (8,932.69 km) |
| Mercer Island to Orastie | 5,652.11 mi (9,096.18 km) |
| Mercer Island to Oravita | 5,674.59 mi (9,132.38 km) |
| Mercer Island to Orsova | 5,708.40 mi (9,186.78 km) |
| Mercer Island to Otelu Rosu | 5,657.20 mi (9,104.38 km) |
| Mercer Island to Otopeni | 5,787.42 mi (9,313.95 km) |
