| Biloxi to Orbetello | 5,301.15 mi (8,531.37 km) |
| Biloxi to Oria | 5,654.60 mi (9,100.20 km) |
| Biloxi to Oristano | 5,266.14 mi (8,475.04 km) |
| Biloxi to Orta Nova | 5,539.16 mi (8,914.42 km) |
| Biloxi to Orte | 5,352.42 mi (8,613.90 km) |
| Biloxi to Ortona | 5,444.73 mi (8,762.44 km) |
| Biloxi to Orvieto | 5,331.38 mi (8,580.02 km) |
| Biloxi to Orzinuovi | 5,147.32 mi (8,283.81 km) |
| Biloxi to Osimo | 5,364.75 mi (8,633.73 km) |
| Biloxi to Ospitaletto | 5,148.29 mi (8,285.37 km) |
| Biloxi to Ostuni | 5,643.54 mi (9,082.40 km) |
| Biloxi to Ottaviano | 5,502.10 mi (8,854.78 km) |
| Biloxi to Ovada | 5,115.94 mi (8,233.31 km) |
| Biloxi to Ozieri | 5,262.93 mi (8,469.86 km) |
| Biloxi to Paceco | 5,516.68 mi (8,878.23 km) |
