| Tartu to Oria | 1,298.52 mi (2,089.76 km) |
| Tartu to Oristano | 1,506.15 mi (2,423.91 km) |
| Tartu to Orta Nova | 1,272.31 mi (2,047.58 km) |
| Tartu to Orte | 1,262.24 mi (2,031.38 km) |
| Tartu to Ortona | 1,229.15 mi (1,978.13 km) |
| Tartu to Orvieto | 1,251.95 mi (2,014.81 km) |
| Tartu to Orzinuovi | 1,140.93 mi (1,836.14 km) |
| Tartu to Osimo | 1,174.98 mi (1,890.95 km) |
| Tartu to Ospitaletto | 1,128.23 mi (1,815.72 km) |
| Tartu to Ostuni | 1,283.63 mi (2,065.80 km) |
| Tartu to Ottaviano | 1,324.75 mi (2,131.98 km) |
| Tartu to Ovada | 1,218.95 mi (1,961.71 km) |
| Tartu to Ozieri | 1,454.46 mi (2,340.73 km) |
| Tartu to Paceco | 1,545.93 mi (2,487.93 km) |
| Tartu to Pachino | 1,586.76 mi (2,553.64 km) |
