| Terre Haute to Orbetello | 4,828.82 mi (7,771.23 km) |
| Terre Haute to Oria | 5,173.94 mi (8,326.66 km) |
| Terre Haute to Oristano | 4,818.87 mi (7,755.23 km) |
| Terre Haute to Orta Nova | 5,059.79 mi (8,142.94 km) |
| Terre Haute to Orte | 4,876.43 mi (7,847.85 km) |
| Terre Haute to Ortona | 4,963.30 mi (7,987.66 km) |
| Terre Haute to Orvieto | 4,854.59 mi (7,812.70 km) |
| Terre Haute to Orzinuovi | 4,659.77 mi (7,499.18 km) |
| Terre Haute to Osimo | 4,879.18 mi (7,852.29 km) |
| Terre Haute to Ospitaletto | 4,659.40 mi (7,498.58 km) |
| Terre Haute to Ostuni | 5,161.69 mi (8,306.93 km) |
| Terre Haute to Ottaviano | 5,029.59 mi (8,094.35 km) |
| Terre Haute to Ovada | 4,636.74 mi (7,462.12 km) |
| Terre Haute to Ozieri | 4,809.69 mi (7,740.44 km) |
| Terre Haute to Paceco | 5,068.91 mi (8,157.63 km) |
