| Holyhead to Nasaud | 1,336.88 mi (2,151.50 km) |
| Holyhead to Navodari | 1,616.80 mi (2,601.98 km) |
| Holyhead to Negresti-Oas | 1,277.37 mi (2,055.73 km) |
| Holyhead to Nehoiu | 1,483.15 mi (2,386.90 km) |
| Holyhead to Ocna Mures | 1,345.45 mi (2,165.29 km) |
| Holyhead to Odobesti | 1,498.96 mi (2,412.34 km) |
| Holyhead to Odorheiu Secuiesc | 1,407.02 mi (2,264.38 km) |
| Holyhead to Oltenita | 1,545.79 mi (2,487.71 km) |
| Holyhead to Onesti | 1,469.08 mi (2,364.26 km) |
| Holyhead to Oradea | 1,242.43 mi (1,999.50 km) |
| Holyhead to Orastie | 1,338.40 mi (2,153.95 km) |
| Holyhead to Oravita | 1,308.84 mi (2,106.38 km) |
| Holyhead to Orsova | 1,349.81 mi (2,172.31 km) |
| Holyhead to Otelu Rosu | 1,316.80 mi (2,119.18 km) |
| Holyhead to Otopeni | 1,504.47 mi (2,421.21 km) |
