| Arklow to Navodari | 1,675.08 mi (2,695.79 km) |
| Arklow to Negresti-Oas | 1,338.18 mi (2,153.60 km) |
| Arklow to Nehoiu | 1,541.40 mi (2,480.64 km) |
| Arklow to Ocna Mures | 1,403.70 mi (2,259.04 km) |
| Arklow to Odobesti | 1,558.47 mi (2,508.11 km) |
| Arklow to Odorheiu Secuiesc | 1,466.22 mi (2,359.65 km) |
| Arklow to Oltenita | 1,602.11 mi (2,578.35 km) |
| Arklow to Onesti | 1,529.21 mi (2,461.03 km) |
| Arklow to Oradea | 1,300.53 mi (2,093.00 km) |
| Arklow to Orastie | 1,395.05 mi (2,245.11 km) |
| Arklow to Oravita | 1,362.36 mi (2,192.50 km) |
| Arklow to Orsova | 1,403.39 mi (2,258.54 km) |
| Arklow to Otelu Rosu | 1,371.99 mi (2,208.01 km) |
| Arklow to Otopeni | 1,561.12 mi (2,512.38 km) |
| Arklow to Ovidiu | 1,674.79 mi (2,695.31 km) |
