| Altenburg to Navodari | 879.82 mi (1,415.93 km) |
| Altenburg to Negresti-Oas | 538.11 mi (866.00 km) |
| Altenburg to Nehoiu | 746.56 mi (1,201.47 km) |
| Altenburg to Ocna Mures | 609.29 mi (980.56 km) |
| Altenburg to Odobesti | 760.37 mi (1,223.70 km) |
| Altenburg to Odorheiu Secuiesc | 668.93 mi (1,076.53 km) |
| Altenburg to Oltenita | 813.93 mi (1,309.89 km) |
| Altenburg to Onesti | 730.00 mi (1,174.83 km) |
| Altenburg to Oradea | 507.19 mi (816.24 km) |
| Altenburg to Orastie | 607.01 mi (976.89 km) |
| Altenburg to Oravita | 592.11 mi (952.90 km) |
| Altenburg to Orsova | 631.76 mi (1,016.72 km) |
| Altenburg to Otelu Rosu | 591.50 mi (951.93 km) |
| Altenburg to Otopeni | 771.85 mi (1,242.17 km) |
| Altenburg to Ovidiu | 879.87 mi (1,416.01 km) |
