| Karhula to Navodari | 1,121.07 mi (1,804.18 km) |
| Karhula to Negresti-Oas | 884.90 mi (1,424.11 km) |
| Karhula to Nehoiu | 1,047.94 mi (1,686.49 km) |
| Karhula to Ocna Mures | 983.88 mi (1,583.40 km) |
| Karhula to Odobesti | 1,019.06 mi (1,640.01 km) |
| Karhula to Odorheiu Secuiesc | 983.46 mi (1,582.73 km) |
| Karhula to Oltenita | 1,135.19 mi (1,826.91 km) |
| Karhula to Onesti | 985.08 mi (1,585.33 km) |
| Karhula to Oradea | 950.44 mi (1,529.59 km) |
| Karhula to Orastie | 1,024.61 mi (1,648.96 km) |
| Karhula to Oravita | 1,090.67 mi (1,755.26 km) |
| Karhula to Orsova | 1,106.84 mi (1,781.29 km) |
| Karhula to Otelu Rosu | 1,052.92 mi (1,694.51 km) |
| Karhula to Otopeni | 1,103.68 mi (1,776.21 km) |
| Karhula to Ovidiu | 1,124.46 mi (1,809.64 km) |
