| Halikko to Navodari | 1,134.07 mi (1,825.12 km) |
| Halikko to Negresti-Oas | 865.70 mi (1,393.21 km) |
| Halikko to Nehoiu | 1,047.81 mi (1,686.29 km) |
| Halikko to Ocna Mures | 968.32 mi (1,558.37 km) |
| Halikko to Odobesti | 1,023.87 mi (1,647.76 km) |
| Halikko to Odorheiu Secuiesc | 977.23 mi (1,572.71 km) |
| Halikko to Oltenita | 1,136.55 mi (1,829.10 km) |
| Halikko to Onesti | 988.30 mi (1,590.52 km) |
| Halikko to Oradea | 921.85 mi (1,483.57 km) |
| Halikko to Orastie | 1,005.13 mi (1,617.59 km) |
| Halikko to Oravita | 1,062.60 mi (1,710.09 km) |
| Halikko to Orsova | 1,083.19 mi (1,743.22 km) |
| Halikko to Otelu Rosu | 1,028.44 mi (1,655.11 km) |
| Halikko to Otopeni | 1,101.87 mi (1,773.29 km) |
| Halikko to Ovidiu | 1,137.11 mi (1,830.01 km) |
