| Tatvan to Orbetello | 1,646.08 mi (2,649.11 km) |
| Tatvan to Oria | 1,316.98 mi (2,119.47 km) |
| Tatvan to Oristano | 1,795.67 mi (2,889.85 km) |
| Tatvan to Orta Nova | 1,415.88 mi (2,278.64 km) |
| Tatvan to Orte | 1,586.24 mi (2,552.80 km) |
| Tatvan to Ortona | 1,483.45 mi (2,387.38 km) |
| Tatvan to Orvieto | 1,600.28 mi (2,575.39 km) |
| Tatvan to Orzinuovi | 1,716.25 mi (2,762.03 km) |
| Tatvan to Osimo | 1,532.55 mi (2,466.40 km) |
| Tatvan to Ospitaletto | 1,710.39 mi (2,752.61 km) |
| Tatvan to Ostuni | 1,319.13 mi (2,122.93 km) |
| Tatvan to Ottaviano | 1,481.18 mi (2,383.73 km) |
| Tatvan to Ovada | 1,776.00 mi (2,858.20 km) |
| Tatvan to Ozieri | 1,768.36 mi (2,845.89 km) |
| Tatvan to Paceco | 1,606.73 mi (2,585.79 km) |
