| National City to Nasaud | 6,418.05 mi (10,328.86 km) |
| National City to Navodari | 6,696.64 mi (10,777.19 km) |
| National City to Negresti-Oas | 6,359.44 mi (10,234.53 km) |
| National City to Nehoiu | 6,579.00 mi (10,587.88 km) |
| National City to Ocna Mures | 6,456.83 mi (10,391.26 km) |
| National City to Odobesti | 6,572.65 mi (10,577.66 km) |
| National City to Odorheiu Secuiesc | 6,497.28 mi (10,456.36 km) |
| National City to Oltenita | 6,662.84 mi (10,722.80 km) |
| National City to Onesti | 6,536.06 mi (10,518.77 km) |
| National City to Oradea | 6,367.46 mi (10,247.44 km) |
| National City to Orastie | 6,471.44 mi (10,414.77 km) |
| National City to Oravita | 6,478.06 mi (10,425.43 km) |
| National City to Orsova | 6,515.42 mi (10,485.55 km) |
| National City to Otelu Rosu | 6,468.43 mi (10,409.92 km) |
| National City to Otopeni | 6,621.07 mi (10,655.58 km) |
