| Derry to Nasaud | 1,460.33 mi (2,350.18 km) |
| Derry to Navodari | 1,744.10 mi (2,806.85 km) |
| Derry to Negresti-Oas | 1,399.93 mi (2,252.97 km) |
| Derry to Nehoiu | 1,610.91 mi (2,592.51 km) |
| Derry to Ocna Mures | 1,473.63 mi (2,371.58 km) |
| Derry to Odobesti | 1,623.85 mi (2,613.34 km) |
| Derry to Odorheiu Secuiesc | 1,532.92 mi (2,466.99 km) |
| Derry to Oltenita | 1,677.27 mi (2,699.31 km) |
| Derry to Onesti | 1,592.60 mi (2,563.05 km) |
| Derry to Oradea | 1,371.32 mi (2,206.93 km) |
| Derry to Orastie | 1,469.87 mi (2,365.53 km) |
| Derry to Oravita | 1,445.92 mi (2,326.99 km) |
| Derry to Orsova | 1,486.67 mi (2,392.56 km) |
| Derry to Otelu Rosu | 1,451.02 mi (2,335.19 km) |
| Derry to Otopeni | 1,635.43 mi (2,631.97 km) |
