| Tallinn to Oria | 1,344.25 mi (2,163.36 km) |
| Tallinn to Oristano | 1,521.38 mi (2,448.42 km) |
| Tallinn to Orta Nova | 1,310.02 mi (2,108.27 km) |
| Tallinn to Orte | 1,285.63 mi (2,069.02 km) |
| Tallinn to Ortona | 1,260.31 mi (2,028.28 km) |
| Tallinn to Orvieto | 1,273.76 mi (2,049.92 km) |
| Tallinn to Orzinuovi | 1,147.62 mi (1,846.91 km) |
| Tallinn to Osimo | 1,200.39 mi (1,931.84 km) |
| Tallinn to Ospitaletto | 1,134.98 mi (1,826.57 km) |
| Tallinn to Ostuni | 1,328.93 mi (2,138.70 km) |
| Tallinn to Ottaviano | 1,358.68 mi (2,186.58 km) |
| Tallinn to Ovada | 1,223.18 mi (1,968.52 km) |
| Tallinn to Ozieri | 1,469.73 mi (2,365.30 km) |
| Tallinn to Paceco | 1,577.32 mi (2,538.45 km) |
| Tallinn to Pachino | 1,627.88 mi (2,619.82 km) |
