| Indiana to Orbetello | 4,433.50 mi (7,135.04 km) |
| Indiana to Oria | 4,783.36 mi (7,698.08 km) |
| Indiana to Oristano | 4,412.29 mi (7,100.90 km) |
| Indiana to Orta Nova | 4,668.38 mi (7,513.03 km) |
| Indiana to Orte | 4,483.02 mi (7,214.72 km) |
| Indiana to Ortona | 4,572.83 mi (7,359.25 km) |
| Indiana to Orvieto | 4,461.55 mi (7,180.17 km) |
| Indiana to Orzinuovi | 4,272.20 mi (6,875.44 km) |
| Indiana to Osimo | 4,490.82 mi (7,227.28 km) |
| Indiana to Ospitaletto | 4,272.58 mi (6,876.05 km) |
| Indiana to Ostuni | 4,771.72 mi (7,679.34 km) |
| Indiana to Ottaviano | 4,634.66 mi (7,458.77 km) |
| Indiana to Ovada | 4,244.63 mi (6,831.07 km) |
| Indiana to Ozieri | 4,405.58 mi (7,090.09 km) |
| Indiana to Paceco | 4,662.94 mi (7,504.27 km) |
