| Duncan to Nasaud | 5,751.15 mi (9,255.58 km) |
| Duncan to Navodari | 6,038.94 mi (9,718.73 km) |
| Duncan to Negresti-Oas | 5,690.14 mi (9,157.40 km) |
| Duncan to Nehoiu | 5,910.10 mi (9,511.38 km) |
| Duncan to Ocna Mures | 5,776.90 mi (9,297.02 km) |
| Duncan to Odobesti | 5,914.20 mi (9,517.99 km) |
| Duncan to Odorheiu Secuiesc | 5,828.69 mi (9,380.37 km) |
| Duncan to Oltenita | 5,985.24 mi (9,632.31 km) |
| Duncan to Onesti | 5,879.55 mi (9,462.22 km) |
| Duncan to Oradea | 5,678.39 mi (9,138.48 km) |
| Duncan to Orastie | 5,780.94 mi (9,303.52 km) |
| Duncan to Oravita | 5,767.52 mi (9,281.93 km) |
| Duncan to Orsova | 5,807.65 mi (9,346.51 km) |
| Duncan to Otelu Rosu | 5,767.85 mi (9,282.45 km) |
| Duncan to Otopeni | 5,942.72 mi (9,563.89 km) |
